The O-Ring, cataloged under National Stock Number 5331-01-287-2927, 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. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-287-2927 |
| Primary Part Number | LHD-8429 ITEM 8 1/2IN |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | William E Williams Valve Corp |
| Status | ACTIVE |
| Center Hole Diameter | 0.500 INCHES NOMINAL IN |
| 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 |
|---|---|
| LHD-8429 ITEM 8 1/2IN PRIMARY | William E Williams Valve Corp (USA) |
| Reference | Meaning |
|---|---|
| LHD8429 ITEM8 1 | C/1 Advisory reference — outside the item-of-supply concept William E Williams Valve Corp |
NSN 5331-01-287-2927 is a O-Ring, manufactured by William E Williams Valve Corp, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-287-2927 has 1 manufacturer part number on file: LHD-8429 ITEM 8 1/2IN (William E Williams Valve Corp).
Key specifications for LHD-8429 ITEM 8 1/2IN: Center Hole Diameter: 0.500 INCHES NOMINAL IN. 1 specification is 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.