The O-Ring, cataloged under National Stock Number 5331-01-437-0082, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5331-01-437-0082 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | CANCELLED |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Hardness Rating | 55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE |
| Color | BLUE |
| Center Hole Diameter | 4.204 INCHES MINIMUM AND 4.264 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 8244-70116 | E/8 Replaced / superseded reference Minnesota Rubber Co |
| MIL-R-25988/3 | 5/9 Secondary reference U.S. Government activity |
| M25988/3-244 | 2/2 Government specification standardization U.S. Government activity |
| AMS-R-25988 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-25988/3 | 4/1 Identification reference U.S. Government activity |
| 2-244L1223-60 | 5/1 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
NSN 5331-01-437-0082 is a O-Ring, classified under FSC 5331, O-ring. Status: cancelled.
6 possible matches (shared part number, not a government interchangeability claim): 5331-01-473-1584, 5331-01-492-7052, 5331-01-494-4559. Verify interchangeability with system specifications before substitution.
Key specifications for 5331-01-437-0082: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Hardness Rating: 55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE; Color: BLUE. 6 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.
NSN 5331-01-437-0082 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.