The O-Ring, cataloged under National Stock Number 5331-01-476-4302, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hale Hamilton (valves) Ltd Div Cad Uxbridge. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-476-4302 |
| Primary Part Number | PL7498 ITEM 43 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Hale Hamilton (valves) Ltd Div Cad Uxbridge |
| Status | ACTIVE |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Criticality Code Justification | ZZZW |
| Material Document and Classification | MIL-R-83248/1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Departure From Cited Document | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Center Hole Diameter | 1.659 INCHES MINIMUM AND 1.689 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| PL7498 ITEM 43 | Hale Hamilton (valves) Ltd Div Cad Uxbridge (GBR) |
| PL7497 ITEM 43 | Hale Hamilton (valves) Ltd Div Cad Uxbridge (GBR) |
| BS1806-131 | Hale Hamilton (valves) Ltd Div Cad Uxbridge (GBR) |
| Reference | Meaning |
|---|---|
| AMS7276 | 5/9 Secondary reference U.S. Government activity |
| M83248/1-131CP | 5/9 Secondary reference U.S. Government activity |
| AS568-131CP | 3/9 Design control — primary reference U.S. Government activity |
| M83248 | 5/9 Secondary reference U.S. Government activity |
| AMS7276 | 5/1 Secondary reference Sae International Dba Sae International |
| AS568-131CP | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 5331-01-476-4302 is a O-Ring, manufactured by Hale Hamilton (valves) Ltd Div Cad Uxbridge, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-476-4302 has 3 manufacturer part numbers on file: PL7498 ITEM 43 (Hale Hamilton (valves) Ltd Div Cad Uxbridge), PL7497 ITEM 43 (Hale Hamilton (valves) Ltd Div Cad Uxbridge), BS1806-131 (Hale Hamilton (valves) Ltd Div Cad Uxbridge).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-476-4321. Verify interchangeability with system specifications before substitution.
Key specifications for PL7498 ITEM 43: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL; Criticality Code Justification: ZZZW; Material Document and Classification: MIL-R-83248/1 MIL SPEC SINGLE MATERIAL RESPONSE. 7 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.