The O-Ring, cataloged under National Stock Number 5331-01-439-2610, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Caterpillar Inc Div Caterpillar Defense (CAGE 11083); Westrac Equipment Pty Ltd (CAGE Z02C9); Hastings Deering (aust) Pty Ltd (CAGE ZF912); William Adams Pty Ltd (CAGE Z8Q46) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-439-2610 |
| Primary Part Number | 9X-7378 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| 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 |
|---|---|
| 9X-7378 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 9X-7378 | Westrac Equipment Pty Ltd (AUS) |
| 9X-7378 | Hastings Deering (aust) Pty Ltd (AUS) |
| 9X-7378 | William Adams Pty Ltd (AUS) |
| Reference | Meaning |
|---|---|
| 10076105 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5331-01-439-2610 is a O-Ring, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-439-2610 has 4 manufacturer part numbers on file: 9X-7378 (Caterpillar Inc Div Caterpillar Defense), 9X-7378 (Westrac Equipment Pty Ltd), 9X-7378 (Hastings Deering (aust) Pty Ltd), 9X-7378 (William Adams Pty Ltd).
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.