The O-Ring, cataloged under National Stock Number 5331-01-438-0344, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is William E Williams Valve Corp. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | William E Williams Valve Corp (CAGE 79342) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-438-0344 |
| Primary Part Number | 1160F 2.50IN PIECE 7 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | William E Williams Valve Corp |
| 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 |
|---|---|
| 1160F 2.50IN PIECE 7 PRIMARY | William E Williams Valve Corp (USA) |
| Reference | Meaning |
|---|---|
| 1160F 2.50IN PC | C/1 Advisory reference — outside the item-of-supply concept William E Williams Valve Corp |
NSN 5331-01-438-0344 is a O-Ring, manufactured by William E Williams Valve Corp, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-438-0344 has 1 manufacturer part number on file: 1160F 2.50IN PIECE 7 (William E Williams Valve 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.