The O-Ring, cataloged under National Stock Number 5331-01-435-0751, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Kirkhill Inc Div Kirkhill Inc, Haskon Division. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-435-0751 |
| Primary Part Number | 55-144 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Kirkhill Inc Div Kirkhill Inc, Haskon Division |
| Status | ACTIVE |
| Specification/standard Data | 11960-55-144 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| 55-144 PRIMARY | Kirkhill Inc Div Kirkhill Inc, Haskon Division (USA) |
| Reference | Meaning |
|---|---|
| 55-144 | 5/9 Secondary reference Kirkhill Ta Haskon Div |
NSN 5331-01-435-0751 is a O-Ring, manufactured by Kirkhill Inc Div Kirkhill Inc, Haskon Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-435-0751 has 1 manufacturer part number on file: 55-144 (Kirkhill Inc Div Kirkhill Inc, Haskon Division).
Key specifications for 55-144: Specification/standard Data: 11960-55-144 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION; Material: RUBBER SYNTHETIC. 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.