The O-Ring, cataloged under National Stock Number 5331-01-588-1580, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Brennan Industries. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | U S Army Tank Automotive Command Amsta-Im-Mm (CAGE 19207); Brennan Industries (CAGE 5E240); Air-Way Manufacturing Company (CAGE 22031) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-588-1580 |
| Primary Part Number | F4003-12 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Brennan Industries |
| 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 |
|---|---|
| 12663079 F4003-12 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| F4003-12 PRIMARY | Brennan Industries (USA) |
| 12663079 F4003-12 PRIMARY | Air-Way Manufacturing Company (USA) |
| Reference | Meaning |
|---|---|
| 12663079 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5331-01-588-1580 is a O-Ring, manufactured by Brennan Industries, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-588-1580 has 3 manufacturer part numbers on file: 12663079 F4003-12 (U S Army Tank Automotive Command Amsta-Im-Mm), F4003-12 (Brennan Industries), 12663079 F4003-12 (Air-Way Manufacturing Company).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-620-5240, 5331-01-724-4084. 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.