The O-Ring, cataloged under National Stock Number 5331-00-257-7396, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Corporation. Government technical data includes 3 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-257-7396 |
| Primary Part Number | 6871091-20 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Cross-Sectional Height | 0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.465 INCHES MINIMUM AND 1.485 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| 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 |
|---|---|
| 6871091-20 PRIMARY | Rolls-Royce Corporation (USA) |
| 6871091-20 | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
NSN 5331-00-257-7396 is a O-Ring, manufactured by Rolls-Royce Corporation, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-257-7396 has 2 manufacturer part numbers on file: 6871091-20 (Rolls-Royce Corporation), 6871091-20 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 6871091-20: Cross-Sectional Height: 0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN; Center Hole Diameter: 1.465 INCHES MINIMUM AND 1.485 INCHES MAXIMUM IN; Material: RUBBER FLUOROSILICONE CLASS FQ. 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.