The O-Ring, cataloged under National Stock Number 5331-00-542-0440, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Bms Services Corp.. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-542-0440 |
| Primary Part Number | M25988/1-147 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Bms Services Corp. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Center Hole Diameter | 2.653 INCHES MINIMUM AND 2.697 INCHES MAXIMUM IN |
| 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 |
|---|---|
| M25988/1-147 PRIMARY | Bms Services Corp. (USA) |
| Reference | Meaning |
|---|---|
| 2661058AY147 | 3/9 Design control — primary reference U.S. Government activity |
| 5331PL2129386 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5331-00-542-0440 is a O-Ring, manufactured by Bms Services Corp., classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-542-0440 has 1 manufacturer part number on file: M25988/1-147 (Bms Services Corp.).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-446-4878. Verify interchangeability with system specifications before substitution.
Key specifications for M25988/1-147: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Center Hole Diameter: 2.653 INCHES MINIMUM AND 2.697 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 3 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.