The O-Ring, cataloged under National Stock Number 5331-01-673-4337, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Brennan Industries. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-673-4337 |
| Primary Part Number | 4008-04 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Brennan Industries |
| Status | ACTIVE |
| Cross-Sectional Height | 0.351 INCHES NOMINAL IN |
| Hardness Rating | 80.0 SHORE DUROMETER A NOMINAL |
| Color | BLACK |
| Center Hole Diameter | 0.072 MILLIMETERS NOMINAL MM |
| Material | RUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM |
| 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 |
|---|---|
| 4008-04 PRIMARY | Brennan Industries (USA) |
| Reference | Meaning |
|---|---|
| 4370144 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 5331-01-673-4337 is a O-Ring, manufactured by Brennan Industries, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-673-4337 has 1 manufacturer part number on file: 4008-04 (Brennan Industries).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-706-6084, 2510-01-717-6730. Verify interchangeability with system specifications before substitution.
Key specifications for 4008-04: Cross-Sectional Height: 0.351 INCHES NOMINAL IN; Hardness Rating: 80.0 SHORE DUROMETER A NOMINAL; Color: BLACK; Center Hole Diameter: 0.072 MILLIMETERS NOMINAL MM. 5 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.