The O-Ring, cataloged under National Stock Number 5331-01-305-4229, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Clarkson Industries Inc Hoffman Air and Filtration Systems Div. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | Clarkson Industries Inc Hoffman Air and Filtration Systems Div (CAGE 28951) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-305-4229 |
| Primary Part Number | 054203 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Clarkson Industries Inc Hoffman Air and Filtration Systems Div |
| 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 |
|---|---|
| 054203 PRIMARY | Clarkson Industries Inc Hoffman Air and Filtration Systems Div (USA) |
| Reference | Meaning |
|---|---|
| 34377-1 ITEM 34 | 5/9 Secondary reference Clarkson Industries Inc Hoffman Air and Filtration Systems Div |
NSN 5331-01-305-4229 is a O-Ring, manufactured by Clarkson Industries Inc Hoffman Air and Filtration Systems Div, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-305-4229 has 1 manufacturer part number on file: 054203 (Clarkson Industries Inc Hoffman Air and Filtration Systems Div).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-425-7843, 4820-01-550-3716. 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.