The O-Ring, cataloged under National Stock Number 5331-01-400-1056, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Coffin Turbo Pump Inc. The record lists 2 manufacturer part numbers 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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Coffin Turbo Pump Inc (CAGE 0APJ5) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-400-1056 |
| Primary Part Number | SKB-296 ITEM X56 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Coffin Turbo Pump Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 18323 | Coffin Turbo Pump Inc (USA) |
| SKB-296 ITEM X56 PRIMARY | Coffin Turbo Pump Inc (USA) |
NSN 5331-01-400-1056 is a O-Ring, manufactured by Coffin Turbo Pump Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-400-1056 has 2 manufacturer part numbers on file: 18323 (Coffin Turbo Pump Inc), SKB-296 ITEM X56 (Coffin Turbo Pump Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5133-01-438-7754, 6240-01-480-2166. Verify interchangeability with system specifications before substitution.
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.