The O-Ring, cataloged under National Stock Number 5331-00-313-0485, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 5 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 | 5331-00-313-0485 |
| Primary Part Number | S8171B20 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Temp Rating | -85.0 FAHRENHEIT AND 401.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Hardness Rating | 50.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 3.969 INCHES MINIMUM AND 3.999 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 |
NSN 5331-00-313-0485 is a O-Ring, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-313-0485 has 2 manufacturer part numbers on file: S8171B20 (Proponent, Inc. Dba Proponent), S8171B20 (Honeywell International Inc. Div Aerospace - Torrance).
Key specifications for S8171B20: Temp Rating: -85.0 FAHRENHEIT AND 401.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Hardness Rating: 50.0 SHORE DUROMETER A NOMINAL; Center Hole Diameter: 3.969 INCHES MINIMUM AND 3.999 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.
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.