The O-Ring, cataloged under National Stock Number 5331-01-277-6590, 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 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-277-6590 |
| Primary Part Number | AS3085-21 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Temp Rating | -5.0 CELSIUS AND 205.0 CELSIUS DEGC |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | AMS7280 ASSN STD SINGLE MATERIAL RESPONSE OR ASTMD2000/SAE J200 ASSN STD SINGLE MATERIAL RESPONSE |
| Color | BROWN |
| Center Hole Diameter | 0.917 INCHES MINIMUM AND 0.935 INCHES MAXIMUM IN |
| Material | RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM |
| Reference Number Differentiating Characteristics | AS DIFF BY SPEC K2617 HTE7300 PERFORMANCE RQMT TORNADO ACFT ENGINE MODEL RB199 |
| 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 |
|---|---|
| AS3085-21 | Rolls-Royce Corporation (USA) |
| Reference | Meaning |
|---|---|
| V0747 2-021 | 3/1 Design control — primary reference Parker-Hannifin Corp Div O-Ring Division |
| AS3085-021 | 5/9 Secondary reference U.S. Government activity |
| 2-021 V747-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| AS3085-021 | 5/1 Secondary reference Sae International Dba Sae International |
| 6823354-21 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 2-021 V747-75 | 5/9 Secondary reference Parker Hannifin Gmbh O-Ring Division |
NSN 5331-01-277-6590 is a O-Ring, manufactured by Rolls-Royce Corporation, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-277-6590 has 1 manufacturer part number on file: AS3085-21 (Rolls-Royce Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-464-0552. Verify interchangeability with system specifications before substitution.
Key specifications for AS3085-21: Temp Rating: -5.0 CELSIUS AND 205.0 CELSIUS DEGC; Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: AMS7280 ASSN STD SINGLE MATERIAL RESPONSE OR ASTMD2000/SAE J200 ASSN STD SINGLE MATERIAL RESPONSE. 8 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.