The O-Ring, cataloged under National Stock Number 5331-01-439-4276, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Neptune Chemical Pump Co Div of R a Industries Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | Neptune Chemical Pump Co Div of R a Industries Inc (CAGE 28625) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-439-4276 |
| Primary Part Number | 100627 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Neptune Chemical Pump Co Div of R a Industries Inc |
| 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 |
|---|---|
| 100627 PRIMARY | Neptune Chemical Pump Co Div of R a Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| DWG 300 FIG NO 344 | 5/9 Secondary reference Neptune Chemical Pump Co Div of R a Industries Inc |
NSN 5331-01-439-4276 is a O-Ring, manufactured by Neptune Chemical Pump Co Div of R a Industries Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-439-4276 has 1 manufacturer part number on file: 100627 (Neptune Chemical Pump Co Div of R a Industries Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5915-01-628-0890, 6515-01-670-3651. 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.