A W Chesterton Co

A W Chesterton Co, Sealing Device Division, doing business as Chesterton, is a for-profit Subchapter S Corporation manufacturer of industrial fluid sealing systems based in Groveland, Massachusetts, that sells original equipment manufacturer shaft seal assemblies, rebuild kits, inflatable seals, packing gland kits, and related maritime sealing components to federal agencies almost exclusively as a prime contractor (99% of recent awards). The vendor competes under full-and-open procurement with no set-aside designations on the vast majority of work; a small fraction of awards carry Total Small Business set-aside tags. Chesterton operates as a sole-source supplier for proprietary sealing solutions, particularly to the U.S. Coast Guard, where it holds a single-award Indefinite Delivery Contract valued at $3,702,457.28 running through February 4, 2029.

Chesterton's federal customer concentration is maritime-heavy and heavily skewed toward the Department of Homeland Security. The top five funding agencies by combined potential value account for 98% of all awards. The Department of Homeland Security U.S. Coast Guard dominates both volume and dollars — 70 awards worth $12.6 million combined potential value — reflecting Chesterton's core role as the original equipment manufacturer for Coast Guard fleet maintenance. The Defense Logistics Agency Land and Maritime contributes 77 awards ($2.5 million), and the Department of the Navy Naval Sea Systems Command places 84 awards ($811 thousand), with Naval Supply Systems Command adding 158 awards ($800 thousand). Recent representative work includes a $488,935.20 firm fixed-price delivery order from the Coast Guard (September 11, 2025) for seal shaft assemblies under the Coast Guard IDC; a $172,855.85 Coast Guard delivery order (April 20, 2026) for seal shaft assemblies; a $244,092.00 Coast Guard purchase order (July 26, 2021) for dry dock rebuild kits, installation kits, and seal assembly rebuild kits; and a $63,490.00 Naval Sea Systems Command purchase order (February 6, 2025) for plain encased seals.

The single-award Coast Guard IDC at $3.7 million ceiling (awarded February 5, 2024) is Chesterton's largest vehicle and underpins the majority of recent work volume. Under this IDC, the vendor has issued numerous delivery orders totaling over $4.7 million. Beyond the Coast Guard IDC, Chesterton holds position on Navy Indefinite Delivery Contract N0010401DZD08 (128 task orders, $328 thousand combined potential value) and Defense Logistics Agency IDC 70Z08024D13001B00 (10 task orders, $5.3 million combined potential value). Across all vehicles, activity has remained flat to slightly declining — 12 awards in 2024, 10 in 2025, and 6 year-to-date in 2026 — and the recompete cliff is minimal: only three awards (combined potential value $267 thousand) face ultimate completion inside the next twenty-four months. Chesterton's subcontract footprint is negligible (1% of awards); the source names three sub-awards to Rolls-Royce Marine North America Inc. and Bird-Johnson Propeller Company, LLC awarded in early 2024 for propeller-related production stock, which do not reflect the vendor's primary sealing-device business.

By NAICS and PSC framing, Chesterton's award portfolio aligns tightly with industrial sealing and maritime propulsion support: 134 awards fall under Gasket, Packing, and Sealing Device Manufacturing (NAICS 332912), 195 under Pump and Pumping Equipment Manufacturing, and the remainder distributed across miscellaneous manufacturing categories. The top PSC codes are Power and Hand Pumps (284 awards) and Packing and Gasket Materials (102 awards), confirming the vendor's role as a specialized OEM sealing-component supplier rather than a systems integrator or service provider. Federal awards span sixteen customer agencies, but the concentration with maritime customers — Coast Guard, Naval Sea Systems Command, Naval Supply Systems Command, and Defense Logistics Agency Land and Maritime — is the dominant signal: these four agencies account for the bulk of the combined $17.2 million potential value across 470 awards dating back to 1985.