The O-Ring, cataloged under National Stock Number 5331-01-072-1665, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corp Div O-Ring Division. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-072-1665 |
| Primary Part Number | E1157 2-012 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Cross-Sectional Height | 0.070 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Color | NATURAL |
| Center Hole Diameter | 0.359 INCHES MINIMUM AND 0.369 INCHES MAXIMUM IN |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 2231510 | Oshkosh Defense Llc (USA) |
| E1157 2-012 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 1N141200012 | Wass Srl (ITA) |
| Reference | Meaning |
|---|---|
| 2231510 | 5/9 Secondary reference Oshkosh Corp |
| 048140-1 | 5/1 Secondary reference L3 Technologies, Inc. Div L3 Keo |
| 12266940-1 | 7/2 Vendor item drawing reference U S Army Tank Automotive Command Amsta-Im-Mm |
| E0798 2-012 | 3/9 Design control — primary reference Parker-Hannifin Corp Div O-Ring Division |
| MILR1149-012ES | 5/9 Secondary reference Eriks B.v. |
| 2-012 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 957C048140-1 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 5331-01-072-1665 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-072-1665 has 3 manufacturer part numbers on file: 2231510 (Oshkosh Defense Llc), E1157 2-012 (Parker-Hannifin Corp Div O-Ring Division), 1N141200012 (Wass Srl).
Key specifications for E1157 2-012: Cross-Sectional Height: 0.070 INCHES NOMINAL IN; Criticality Code Justification: FEAT; Color: NATURAL; Special Features: WEAPON SYSTEM ESSENTIAL. 5 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.