The O-Ring, cataloged under National Stock Number 5331-01-691-0981, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Tulsa Winch, Inc.. Government technical data includes 1 specification, 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-691-0981 |
| Primary Part Number | 25968 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Tulsa Winch, Inc. |
| Status | ACTIVE |
| Hardness Rating | 90.0 SHORE DUROMETER A MINIMUM AND 372.0 SHORE DUROMETER A MAXIMUM |
| 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 |
|---|---|
| 25968 PRIMARY | Tulsa Winch, Inc. (USA) |
NSN 5331-01-691-0981 is a O-Ring, manufactured by Tulsa Winch, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-691-0981 has 1 manufacturer part number on file: 25968 (Tulsa Winch, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 1560-01-715-8908, 1560-01-722-7891. Verify interchangeability with system specifications before substitution.
Key specifications for 25968: Hardness Rating: 90.0 SHORE DUROMETER A MINIMUM AND 372.0 SHORE DUROMETER A MAXIMUM; Special Features: INSIDE DIAMETER 8.750 NOMINAL INCHES;CROSS SECTION 0.1875 NOMINAL INCHES;; Part Name Assigned by Controlling Agency: O-RING; End Item Identification: WINCH,HYDRAULICS. 1 specification is 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.