The O-Ring, cataloged under National Stock Number 5331-01-321-4127, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Apple Rubber Products, Inc. Dba Apple Rubber Products Inc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-321-4127 |
| Primary Part Number | 0.126X0.036 70BN |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Apple Rubber Products, Inc. Dba Apple Rubber Products Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.033 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.121 INCHES MINIMUM AND 0.131 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| 19559-001 | Astronautics Corporation of America (USA) |
| 0.126X0.036 70BN PRIMARY | Apple Rubber Products, Inc. Dba Apple Rubber Products Inc (USA) |
| Reference | Meaning |
|---|---|
| 19559-001 | C/1 Advisory reference — outside the item-of-supply concept Apple Rubber Products, Inc. Dba Apple Rubber Products Inc |
NSN 5331-01-321-4127 is a O-Ring, manufactured by Apple Rubber Products, Inc. Dba Apple Rubber Products Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-321-4127 has 2 manufacturer part numbers on file: 19559-001 (Astronautics Corporation of America), 0.126X0.036 70BN (Apple Rubber Products, Inc. Dba Apple Rubber Products Inc).
Key specifications for 0.126X0.036 70BN: Cross-Sectional Height: 0.033 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN; Center Hole Diameter: 0.121 INCHES MINIMUM AND 0.131 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 3 specifications are 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.