The O-Ring, cataloged under National Stock Number 5331-01-522-2231, 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 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. 3 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 | 5331-01-522-2231 |
| Primary Part Number | 4000-24 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Brennan Industries |
| Status | ACTIVE |
| Cross-Sectional Height | 0.118 INCHES NOMINAL IN |
| Hardness Rating | 90.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 1.720 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 |
|---|---|
| HI-721-3100 IT 128 | Hhe Services, Inc. (USA) |
| 4000-24 PRIMARY | Brennan Industries (USA) |
NSN 5331-01-522-2231 is a O-Ring, manufactured by Brennan Industries, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-522-2231 has 2 manufacturer part numbers on file: HI-721-3100 IT 128 (Hhe Services, Inc.), 4000-24 (Brennan Industries).
3 possible matches (shared part number, not a government interchangeability claim): 5120-01-546-6148, 6140-01-550-2719, 5935-01-673-5865. Verify interchangeability with system specifications before substitution.
Key specifications for 4000-24: Cross-Sectional Height: 0.118 INCHES NOMINAL IN; Hardness Rating: 90.0 SHORE DUROMETER A NOMINAL; Center Hole Diameter: 1.720 INCHES NOMINAL IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.