The O-Ring, cataloged under National Stock Number 5331-01-284-3726, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Api Heat Transfer Inc. Dba Api Heat Transfer 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Api Heat Transfer Inc. Dba Api Heat Transfer Inc (CAGE 4DKY8) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-284-3726 |
| Primary Part Number | 4018-00-0005-00-05 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Api Heat Transfer Inc. Dba Api Heat Transfer 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 |
|---|---|
| 4018-00-0005-00-05 PRIMARY | Api Heat Transfer Inc. Dba Api Heat Transfer Inc (USA) |
| Reference | Meaning |
|---|---|
| B-080G01R-5 | 3/9 Design control — primary reference American Precision Industries Inc Basco Div |
NSN 5331-01-284-3726 is a O-Ring, manufactured by Api Heat Transfer Inc. Dba Api Heat Transfer Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-284-3726 has 1 manufacturer part number on file: 4018-00-0005-00-05 (Api Heat Transfer Inc. Dba Api Heat Transfer Inc).
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.