The O-Ring, cataloged under National Stock Number 5331-01-138-2484, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Alfa Laval Inc. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-138-2484 |
| Primary Part Number | 99139272 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Alfa Laval Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 5.3 MILLIMETERS MINIMUM AND 5.7 MILLIMETERS MAXIMUM MM |
| Center Hole Diameter | 49.2 MILLIMETERS MINIMUM AND 50.8 MILLIMETERS MAXIMUM MM |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| 99139272 PRIMARY | Alfa Laval Inc (USA) |
| Reference | Meaning |
|---|---|
| 39272 | 5/9 Secondary reference Alfa Laval Inc |
NSN 5331-01-138-2484 is a O-Ring, manufactured by Alfa Laval Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-138-2484 has 1 manufacturer part number on file: 99139272 (Alfa Laval Inc).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-470-5174. Verify interchangeability with system specifications before substitution.
Key specifications for 99139272: Cross-Sectional Height: 5.3 MILLIMETERS MINIMUM AND 5.7 MILLIMETERS MAXIMUM MM; Center Hole Diameter: 49.2 MILLIMETERS MINIMUM AND 50.8 MILLIMETERS MAXIMUM MM; Material: RUBBER SYNTHETIC. 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.