The O-Ring, cataloged under National Stock Number 5331-01-503-6512, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-503-6512 |
| Primary Part Number | 040204 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.059 INCHES NOMINAL IN |
| Hardness Rating | 80.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 0.275 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 040204 PRIMARY | Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc (USA) |
| 7326195 FIND 3 | Naval Sea Systems Command (USA) |
NSN 5331-01-503-6512 is a O-Ring, manufactured by Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-503-6512 has 2 manufacturer part numbers on file: 040204 (Bridgeport-Piedmont Mfg Co Div of Bridge Products Inc), 7326195 FIND 3 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-586-2292. Verify interchangeability with system specifications before substitution.
Key specifications for 040204: Cross-Sectional Height: 0.059 INCHES NOMINAL IN; Hardness Rating: 80.0 SHORE DUROMETER A NOMINAL; Special Features: MATERIAL HNBR; Center Hole Diameter: 0.275 INCHES NOMINAL IN. 4 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.