The O-Ring, cataloged under National Stock Number 5331-01-271-0982, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is W S Darley & Co. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | W S Darley & Co (CAGE 15852); Kovatch Corp. (CAGE 59556) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-271-0982 |
| Primary Part Number | 2154500 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | W S Darley & Co |
| 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 |
|---|---|
| 2154500 PRIMARY | W S Darley & Co (USA) |
| 051-00007-39 | Kovatch Corp. (USA) |
| Reference | Meaning |
|---|---|
| S439 | 5/9 Secondary reference W S Darley & Co |
NSN 5331-01-271-0982 is a O-Ring, manufactured by W S Darley & Co, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-271-0982 has 2 manufacturer part numbers on file: 2154500 (W S Darley & Co), 051-00007-39 (Kovatch Corp.).
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.