The O-Ring, cataloged under National Stock Number 5331-01-181-4953, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Fairbanks Morse, Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Fairbanks Morse, Llc (CAGE 7PZX0) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-181-4953 |
| Primary Part Number | 16101261 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Fairbanks Morse, Llc |
| 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 |
|---|---|
| 16400561 PIECE 28 | Fairbanks Morse, Llc (USA) |
| 16101261 PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| 16410261 | 5/9 Secondary reference Fairbanks Morse, Llc |
| 16400561 PIECE 28 | 3/9 Design control — primary reference U.S. Government activity |
| 37307507 | 5/9 Secondary reference Kuehn N L Co |
| 16410261 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-01-181-4953 is a O-Ring, manufactured by Fairbanks Morse, Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-181-4953 has 2 manufacturer part numbers on file: 16400561 PIECE 28 (Fairbanks Morse, Llc), 16101261 (Fairbanks Morse, Llc).
1 possible match (shared part number, not a government interchangeability claim): 6695-01-333-4009. 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.