The O-Ring, cataloged under National Stock Number 5331-00-105-8679, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Grimes Aerospace Company. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-105-8679 |
| Primary Part Number | P25C85 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Cross-Sectional Height | 0.485 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Material | RUBBER SILICONE CLASS Q |
| 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 |
|---|---|
| P25C85 | Aero International, Llc Dba Ams Engineered Solutions (USA) |
| P25C85 PRIMARY | Grimes Aerospace Company (USA) |
| 25C85-15 | Sikorsky Helitech Sikorsky Aircraft Australia Ltd Div Sikorsky Australia (AUS) |
| Reference | Meaning |
|---|---|
| 25C85-15 | 5/9 Secondary reference Helitech Div of Sikorsky Aircraft Ltd. Div Helitech |
NSN 5331-00-105-8679 is a O-Ring, manufactured by Grimes Aerospace Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-105-8679 has 3 manufacturer part numbers on file: P25C85 (Aero International, Llc Dba Ams Engineered Solutions), P25C85 (Grimes Aerospace Company), 25C85-15 (Sikorsky Helitech Sikorsky Aircraft Australia Ltd Div Sikorsky Australia).
1 possible match (shared part number, not a government interchangeability claim): 5330-00-626-7731. Verify interchangeability with system specifications before substitution.
Key specifications for P25C85: Cross-Sectional Height: 0.485 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN; Center Hole Diameter: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Material: RUBBER SILICONE CLASS Q. 3 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.