The O-Ring, cataloged under National Stock Number 5331-01-380-2781, 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 2 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. 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 | 5331-01-380-2781 |
| Primary Part Number | 32566 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Tulsa Winch, Inc. |
| Status | ACTIVE |
| Center Hole Diameter | 3.250 INCHES NOMINAL IN |
| Material | RUBBER |
| 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 |
|---|---|
| 32566 PRIMARY | Tulsa Winch, Inc. (USA) |
NSN 5331-01-380-2781 is a O-Ring, manufactured by Tulsa Winch, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-380-2781 has 1 manufacturer part number on file: 32566 (Tulsa Winch, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-473-2045. Verify interchangeability with system specifications before substitution.
Key specifications for 32566: Center Hole Diameter: 3.250 INCHES NOMINAL IN; Material: RUBBER. 2 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.