The O-Ring, cataloged under National Stock Number 5331-01-129-2007, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5331-01-129-2007 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | CANCELLED |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Hardness Rating | 60.0 SHORE DUROMETER A NOMINAL |
| Elongation Percentage | 125 MAXIMUM |
| Center Hole Diameter | 2.082 INCHES MINIMUM AND 2.118 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 |
|---|---|
| MIL-DTL-25988 | 5/9 Secondary reference U.S. Government activity |
| MIL-R-25988/3 | 5/9 Secondary reference U.S. Government activity |
| 2-330L1223-60 | 5/1 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| MIL-DTL-25988/3 | 4/1 Identification reference U.S. Government activity |
| M25988/3-330 | 2/2 Government specification standardization U.S. Government activity |
NSN 5331-01-129-2007 is a O-Ring, classified under FSC 5331, O-ring. Status: cancelled.
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-189-8269, 5331-01-598-4744. Verify interchangeability with system specifications before substitution.
Key specifications for 5331-01-129-2007: Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Hardness Rating: 60.0 SHORE DUROMETER A NOMINAL; Elongation Percentage: 125 MAXIMUM; Center Hole Diameter: 2.082 INCHES MINIMUM AND 2.118 INCHES MAXIMUM IN. 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.
NSN 5331-01-129-2007 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.