Top 100 Contractors in PSC 6685: Pressure, Temperature, and Humidity Measuring and Controlling Instruments, FY2021

Name: Top 100 Contractors in PSC 6685: Pressure, Temperature, and Humidity Measuring and Controlling Instruments, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 60% of FY2021 PSC 6685 contract dollars

Contract obligations: $155,996,413 Net of deobligations, by contracts coded PSC 6685
Contractors: 585 Parent companies with an obligation
Largest contractor: Northrop Grumman Corporation $58.6 million, 36.6% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Northrop Grumman Corporation 3 awardees, including Northrop Grumman Systems Corp Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$58,576,521	36.6%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and not on the FY2025 list; unchanged since FY2020.
2	King Nutronics Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$11,486,374	7.2%	Rank history: #3 in FY2022, #3 in FY2023, #22 in FY2024 and #31 in FY2025; up 6 since FY2020.
3	RTX Corporation 8 awardees, including Rosemount Aerospace Inc., Hornet Acquisitionco, LLC and Hamilton Sundstrand Corporation Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$6,308,400	3.9%	Rank history: #2 in FY2022, #2 in FY2023, #3 in FY2024 and #15 in FY2025; unchanged since FY2020.
4	Rolls-Royce Military Aero Engines Ltd 3 awardees, including Rolls-Royce Corporation and Rolls-Royce Solutions America Inc. Top agencies DLA (Defense Logistics Agency)	$5,278,913	3.3%	Rank history: #4 in FY2022, #51 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
5	Testvonics Inc. Top agencies Navy (Department of the Navy)	$3,286,855	2.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
6	R. S. Means Company LLC 3 awardees, including Fluke Electronics Corp and Setra Systems, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$2,639,492	1.6%	Rank history: #5 in FY2022, #5 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
7	Westbase Inc Through Phaostron Instrument and Electronic Company Top agencies DLA (Defense Logistics Agency)	$2,441,228	1.5%	Rank history: #15 in FY2022, #8 in FY2023, #29 in FY2024 and not on the FY2025 list; up 26 since FY2020.
8	MMC Metrology Lab, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,089,626	1.3%	Rank history: #8 in FY2022, #7 in FY2023, #9 in FY2024 and #5 in FY2025; up 1 since FY2020.
9	Daily Instruments Corporation Through Thermocontrol Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$1,730,681	1.1%	Rank history: #9 in FY2022, #13 in FY2023, #15 in FY2024 and not on the FY2025 list; up 4 since FY2020.
10	Kulite Semiconductor Products Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DHS (Department of Homeland Security)	$1,659,781	1.0%	Rank history: #7 in FY2022, #17 in FY2023, #8 in FY2024 and #11 in FY2025; up 11 since FY2020.
11	ABB Inc. Top agencies USAF (Department of the Air Force)	$1,617,065	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	Cameron Technologies US Inc. 2 awardees, including Cameron Energy Services Corp. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,555,100	1.0%	Rank history: #46 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
13	Paragon Robotics LLC Top agencies HHS (Department of Health and Human Services)	$1,519,815	0.9%	Rank history: #18 in FY2022, #14 in FY2023, #27 in FY2024 and #49 in FY2025; down 3 since FY2020.
14	Moeller Instrument Company, Inc. Top agencies DLA (Defense Logistics Agency)	$1,516,991	0.9%	Rank history: #29 in FY2022, #22 in FY2023, #42 in FY2024 and #21 in FY2025; up 13 since FY2020.
15	Trillamed LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$1,475,140	0.9%	Rank history: #89 in FY2022, #89 in FY2023, not on the FY2024 list and #52 in FY2025; up 136 since FY2020.
16	Danaher Corporation 3 awardees, including Pall Aeropower Corporation, Sea-Bird Electronics, Inc. and OTT Hydromet Corp Top agencies DLA (Defense Logistics Agency) Commerce (Department of Commerce) Army (Department of the Army)	$1,440,899	0.9%	Rank history: #23 in FY2022, #10 in FY2023, #2 in FY2024 and #19 in FY2025; unchanged since FY2020.
17	L3Harris Technologies, Inc. 3 awardees, including CAE USA Inc. and L3 Technologies, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,393,433	0.9%	Rank history: #11 in FY2022, #32 in FY2023, not on the FY2024 list and #20 in FY2025; new, not ranked in FY2020.
18	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$1,370,890	0.9%	Rank history: #13 in FY2022, #11 in FY2023, #14 in FY2024 and #7 in FY2025; up 5 since FY2020.
19	S I T Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,237,209	0.8%	Rank history: #63 in FY2022, not on the FY2023 list, #12 in FY2024 and #27 in FY2025; up 24 since FY2020.
20	Honeywell International Inc. 5 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,190,605	0.7%	Rank history: #16 in FY2022, #39 in FY2023, #13 in FY2024 and #2 in FY2025; up 20 since FY2020.
21	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,135,137	0.7%	Rank history: #20 in FY2022, #26 in FY2023, #45 in FY2024 and not on the FY2025 list; up 30 since FY2020.
22	Chase Supply, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,057,352	0.7%	Rank history: #35 in FY2022, #19 in FY2023, #53 in FY2024 and #38 in FY2025; down 5 since FY2020.
23	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,013,292	0.6%	Rank history: #22 in FY2022, #18 in FY2023, #36 in FY2024 and #13 in FY2025; down 9 since FY2020.
24	Daughtridge Sales Company, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$966,815	0.6%	Rank history: #26 in FY2022, #20 in FY2023, #34 in FY2024 and #37 in FY2025; up 5 since FY2020.
25	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$876,530	0.5%	Rank history: #30 in FY2022, #15 in FY2023, #59 in FY2024 and #47 in FY2025; up 12 since FY2020.
26	RDF Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$728,191	0.5%	Rank history: #83 in FY2022, #62 in FY2023, #48 in FY2024 and #68 in FY2025; up 5 since FY2020.
27	The Churchill Companies Through TSI Incorporated Top agencies DLA (Defense Logistics Agency)	$712,315	0.4%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
28	Tavis Corp Top agencies Navy (Department of the Navy)	$693,140	0.4%	Rank history: not on the FY2022 list, #98 in FY2023, #35 in FY2024 and not on the FY2025 list; up 92 since FY2020.
29	Northrop Grumman Systems Corp Top agencies USAF (Department of the Air Force)	$692,724	0.4%	Rank history: not on the FY2022–FY2025 lists; down 25 since FY2020.
30	Standard Communications Inc. Top agencies VA (Department of Veterans Affairs)	$646,651	0.4%	Rank history: not on the FY2022–FY2025 lists; down 15 since FY2020.
31	Thunder Scientific Corp Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOI (Department of the Interior)	$640,191	0.4%	Rank history: not on the FY2022 list, #50 in FY2023, #56 in FY2024 and not on the FY2025 list; up 273 since FY2020.
32	Transdigm Group Incorporated 6 awardees, including Semco Instruments, Inc., Tactair Fluid Controls Inc. and Harcosemco LLC Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$625,259	0.4%	Rank history: #10 in FY2022, #25 in FY2023, #82 in FY2024 and not on the FY2025 list; up 86 since FY2020.
33	Advanced Products Services Inc. Top agencies DLA (Defense Logistics Agency)	$604,438	0.4%	Rank history: #36 in FY2022, #75 in FY2023, #33 in FY2024 and #60 in FY2025; up 12 since FY2020.
34	Lockheed Martin Corporation 4 awardees, including Derco Aerospace, Inc. and Sikorsky Aircraft Corporation Top agencies DLA (Defense Logistics Agency)	$597,309	0.4%	Rank history: #52 in FY2022, #46 in FY2023, #7 in FY2024 and not on the FY2025 list; up 34 since FY2020.
35	Rolls-Royce Marine North America Inc. Top agencies DLA (Defense Logistics Agency)	$584,871	0.4%	Rank history: not on the FY2022 list, #69 in FY2023, #44 in FY2024 and #84 in FY2025; up 262 since FY2020.
36	Bollinger Shipyards Inc Through Chand, L.L.C. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$565,206	0.4%	Rank history: #19 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; up 143 since FY2020.
37	AGM Container Controls Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$563,348	0.4%	Rank history: #27 in FY2022, #27 in FY2023, #24 in FY2024 and #32 in FY2025; down 13 since FY2020.
38	Allied Defense Industries Inc. 3 awardees, including Aero International, LLC and Allied Marine Services LLC Top agencies DLA (Defense Logistics Agency)	$548,967	0.3%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; up 210 since FY2020.
39	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$548,131	0.3%	Rank history: #55 in FY2022, #42 in FY2023, #78 in FY2024 and #44 in FY2025; up 7 since FY2020.
40	Stealth Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$535,172	0.3%	Rank history: #69 in FY2022, not on the FY2023 list, #31 in FY2024 and #63 in FY2025; up 14 since FY2020.
41	E-Control Systems Inc. Top agencies HHS (Department of Health and Human Services)	$531,852	0.3%	Rank history: #56 in FY2022, not on the FY2023 list, #85 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
42	Statz Corp Top agencies DLA (Defense Logistics Agency)	$514,998	0.3%	Rank history: #78 in FY2022 and not on the FY2023–FY2025 lists; up 172 since FY2020.
43	Curtiss-Wright Corporation Through Peerless Instrument Co., Inc. Top agencies Navy (Department of the Navy)	$499,906	0.3%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
44	QED Inc. Top agencies DLA (Defense Logistics Agency)	$480,935	0.3%	Rank history: #62 in FY2022, #56 in FY2023, #64 in FY2024 and #70 in FY2025; down 12 since FY2020.
45	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency)	$472,742	0.3%	Rank history: #41 in FY2022, #28 in FY2023, #50 in FY2024 and #6 in FY2025; down 19 since FY2020.
46	Noresco LLC 4 awardees, including Sensitech Inc. and Kidde Technologies Inc. Top agencies DLA (Defense Logistics Agency) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$460,233	0.3%	Rank history: not on the FY2022 list, #23 in FY2023 and not on the FY2024–FY2025 lists; up 92 since FY2020.
47	Perma-Cal Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$455,941	0.3%	Rank history: #33 in FY2022, #24 in FY2023, #30 in FY2024 and #23 in FY2025; unchanged since FY2020.
48	Aarcorp Through AAR Supply Chain, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$450,516	0.3%	Rank history: #44 in FY2022, #49 in FY2023, #67 in FY2024 and not on the FY2025 list; down 30 since FY2020.
49	Rees Scientific Corporation Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$445,938	0.3%	Rank history: #28 in FY2022, #83 in FY2023, not on the FY2024 list and #54 in FY2025; up 15 since FY2020.
50	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$429,195	0.3%	Rank history: #65 in FY2022, #68 in FY2023, not on the FY2024 list and #62 in FY2025; up 8 since FY2020.
51	Nagano Keiki Co. Ltd. 2 awardees, including Ashcroft Inc. Top agencies Navy (Department of the Navy)	$422,395	0.3%	Rank history: #75 in FY2022, #41 in FY2023, not on the FY2024 list and #85 in FY2025; up 55 since FY2020.
52	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$421,007	0.3%	Rank history: not on the FY2022 list, #48 in FY2023, #11 in FY2024 and #26 in FY2025; down 13 since FY2020.
53	Standard Calibrations Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$407,182	0.3%	Rank history: #40 in FY2022, #31 in FY2023, #37 in FY2024 and #40 in FY2025; down 17 since FY2020.
54	Integrated Procurement Technologies Top agencies DLA (Defense Logistics Agency)	$386,993	0.2%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
55	Ideal Aerosmith Inc. Top agencies USAF (Department of the Air Force)	$338,400	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	Aircraft Instruments Co Top agencies DLA (Defense Logistics Agency)	$331,670	0.2%	Rank history: #58 in FY2022, not on the FY2023 list, #68 in FY2024 and not on the FY2025 list; unchanged since FY2020.
57	Government Acquisitions LLC Top agencies HHS (Department of Health and Human Services)	$313,159	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Sensor Systems, L.L.C. Top agencies DLA (Defense Logistics Agency)	$305,164	0.2%	Rank history: not on the FY2022–FY2023 lists, #16 in FY2024 and #18 in FY2025; down 8 since FY2020.
59	Garrison Walker Group Inc. Top agencies DLA (Defense Logistics Agency)	$296,495	0.2%	Rank history: not on the FY2022–FY2025 lists; up 60 since FY2020.
60	Prime Technology LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$293,300	0.2%	Rank history: #39 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; up 217 since FY2020.
61	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$282,617	0.2%	Rank history: #72 in FY2022, not on the FY2023 list, #95 in FY2024 and #55 in FY2025; up 123 since FY2020.
62	EOI Inc. Top agencies VA (Department of Veterans Affairs)	$271,929	0.2%	Rank history: #24 in FY2022, not on the FY2023–FY2024 lists and #25 in FY2025; up 54 since FY2020.
63	The Boeing Company 5 awardees, including Boeing Distribution, Inc. and Boeing Distribution Services X, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$269,041	0.2%	Rank history: not on the FY2022 list, #72 in FY2023, #23 in FY2024 and #16 in FY2025; up 48 since FY2020.
64	Faro Technologies Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$260,476	0.2%	Rank history: not on the FY2022 list, #71 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
65	Schneider Electric Buildings Americas Inc. 2 awardees, including Schneider Electric Systems Usa, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$258,229	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	J & S Instruments Inc. Top agencies DLA (Defense Logistics Agency)	$256,975	0.2%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
67	Sogen Company, Inc. Top agencies DLA (Defense Logistics Agency)	$254,565	0.2%	Rank history: not on the FY2022–FY2025 lists; up 64 since FY2020.
68	Aantilia LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$247,817	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Hydraulics International, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$246,812	0.2%	Rank history: not on the FY2022–FY2025 lists; up 103 since FY2020.
70	International Television Corporation Top agencies DLA (Defense Logistics Agency) DOI (Department of the Interior)	$246,311	0.2%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; up 19 since FY2020.
71	Marine Canada Acquisition Inc Top agencies DLA (Defense Logistics Agency)	$245,133	0.2%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
72	Eaton Corporation Through Eaton Aerospace LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$241,341	0.2%	Rank history: #51 in FY2022, not on the FY2023 list, #52 in FY2024 and not on the FY2025 list; up 52 since FY2020.
73	Safepoint Scientific LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$240,434	0.2%	Rank history: not on the FY2022–FY2025 lists; up 22 since FY2020.
74	Rev-Cap Company, Inc. Top agencies DLA (Defense Logistics Agency)	$240,146	0.2%	Rank history: #49 in FY2022 and not on the FY2023–FY2025 lists; up 104 since FY2020.
75	General Dynamics Corporation Through Electric Boat Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$231,771	0.1%	Rank history: #81 in FY2022, #95 in FY2023, #26 in FY2024 and not on the FY2025 list; up 392 since FY2020.
76	Fairbanks Morse LLC Top agencies Navy (Department of the Navy)	$219,367	0.1%	Rank history: not on the FY2022 list, #53 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
77	Thermo Electron Corporation 3 awardees, including Thermo Electron North America LLC and Fisher Scientific Company L.L.C. Top agencies Commerce (Department of Commerce) EPA (Environmental Protection Agency) DLA (Defense Logistics Agency)	$216,495	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$214,512	0.1%	Rank history: not on the FY2022 list, #84 in FY2023, not on the FY2024 list and #73 in FY2025; up 216 since FY2020.
79	Greene Machine & Manufacturing Inc. Top agencies USAF (Department of the Air Force)	$213,572	0.1%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
80	Nortekusa, Inc. Top agencies Commerce (Department of Commerce)	$212,870	0.1%	Rank history: #87 in FY2022 and not on the FY2023–FY2025 lists; up 17 since FY2020.
81	Johnson Controls Security Solutions LLC 3 awardees, including Johnson Controls, Inc. and Johnson Controls Navy Systems, LLC Top agencies DHA (Defense Health Agency) DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$212,811	0.1%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; up 265 since FY2020.
82	Westsim Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$206,788	0.1%	Rank history: #42 in FY2022, not on the FY2023 list, #62 in FY2024 and #65 in FY2025; down 2 since FY2020.
83	RH Systems LLC Top agencies USAF (Department of the Air Force)	$203,925	0.1%	Rank history: #25 in FY2022, #12 in FY2023, #58 in FY2024 and not on the FY2025 list; down 72 since FY2020.
84	NGB Corp Top agencies DLA (Defense Logistics Agency)	$202,813	0.1%	Rank history: not on the FY2022–FY2024 lists and #81 in FY2025; up 59 since FY2020.
85	GMS International Corporation Top agencies DLA (Defense Logistics Agency)	$202,813	0.1%	Rank history: #66 in FY2022, #57 in FY2023, #38 in FY2024 and #76 in FY2025; up 27 since FY2020.
86	Outdoor Venture Corp Through Ovc-Engineered Solutions LLC Top agencies DLA (Defense Logistics Agency)	$202,704	0.1%	Rank history: #90 in FY2022, not on the FY2023 list, #71 in FY2024 and not on the FY2025 list; down 15 since FY2020.
87	D7, LLC Top agencies Commerce (Department of Commerce)	$197,669	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Measurements International Inc. Top agencies Commerce (Department of Commerce) Navy (Department of the Navy)	$194,440	0.1%	Rank history: not on the FY2022–FY2024 lists and #97 in FY2025; up 252 since FY2020.
89	Hydro-Fitting Manufacturing Corporation Top agencies DLA (Defense Logistics Agency)	$192,415	0.1%	Rank history: #88 in FY2022, #96 in FY2023, not on the FY2024 list and #79 in FY2025; up 103 since FY2020.
90	Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency)	$191,802	0.1%	Rank history: not on the FY2022–FY2025 lists; up 13 since FY2020.
91	The Airflo Instrument Company Top agencies DLA (Defense Logistics Agency)	$189,422	0.1%	Rank history: not on the FY2022–FY2025 lists; up 116 since FY2020.
92	Suco Technologies, Inc. Top agencies DLA (Defense Logistics Agency)	$187,442	0.1%	Rank history: #96 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; up 66 since FY2020.
93	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$179,700	0.1%	Rank history: #73 in FY2022, #37 in FY2023, #72 in FY2024 and #45 in FY2025; down 20 since FY2020.
94	Kearflex Engineering Company Top agencies USAF (Department of the Air Force)	$179,100	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Nasco Aerospace and Electronics LLC Top agencies Navy (Department of the Navy)	$176,302	0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
96	Clariant AG Top agencies DLA (Defense Logistics Agency)	$167,370	0.1%	Rank history: not on the FY2022 list, #80 in FY2023 and not on the FY2024–FY2025 lists; up 72 since FY2020.
97	Pro-Line Procurement Services LLC Top agencies Navy (Department of the Navy)	$166,545	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Parker-Hannifin Corporation Top agencies DLA (Defense Logistics Agency)	$166,309	0.1%	Rank history: not on the FY2022–FY2023 lists, #61 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
99	Bhayana Brothers LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DOI (Department of the Interior)	$159,226	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Phoenix Systems Engineering Inc. Top agencies DLA (Defense Logistics Agency)	$152,058	0.1%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.

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100 of 585 contractors listed here. See the rest on GovTribe.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $160 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC 6685 contractors in FY2021?

1. Northrop Grumman Corporation ($58.6M), 2. King Nutronics Corporation ($11.5M), 3. RTX Corporation ($6.31M), 4. Rolls-Royce Military Aero Engines Ltd ($5.28M), 5. Testvonics Inc. ($3.29M), 6. R. S. Means Company LLC ($2.64M), 7. Westbase Inc ($2.44M), 8. MMC Metrology Lab, Inc. ($2.09M), 9. Daily Instruments Corporation ($1.73M), 10. Kulite Semiconductor Products Inc. ($1.66M).

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