The O-Ring, cataloged under National Stock Number 5331-01-304-7791, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Wilkes & Mc Lean Ltd Div Wilkes and Mclean Ltd. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Wilkes & Mc Lean Ltd Div Wilkes and Mclean Ltd (CAGE 62834) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-304-7791 |
| Primary Part Number | R210-4/7 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Wilkes & Mc Lean Ltd Div Wilkes and Mclean Ltd |
| 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 |
|---|---|
| R210-4/7 PRIMARY | Wilkes & Mc Lean Ltd Div Wilkes and Mclean Ltd (USA) |
NSN 5331-01-304-7791 is a O-Ring, manufactured by Wilkes & Mc Lean Ltd Div Wilkes and Mclean Ltd, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-304-7791 has 1 manufacturer part number on file: R210-4/7 (Wilkes & Mc Lean Ltd Div Wilkes and Mclean 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.