The O-Ring, cataloged under National Stock Number 5331-01-536-6215, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-536-6215 |
| Primary Part Number | 167-4407 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 2.710 INCHES MINIMUM AND 2.758 INCHES MAXIMUM IN |
| Material | RUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM |
| 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 |
|---|---|
| 12KP653 | Oshkosh Defense Llc (USA) |
| 50028659 | Rheinmetall Bae Systems Land Limited (GBR) |
| 167-4407 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 10076356 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 12KP653 | 5/9 Secondary reference Oshkosh Corp |
NSN 5331-01-536-6215 is a O-Ring, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-536-6215 has 3 manufacturer part numbers on file: 12KP653 (Oshkosh Defense Llc), 50028659 (Rheinmetall Bae Systems Land Limited), 167-4407 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 167-4407: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL; Center Hole Diameter: 2.710 INCHES MINIMUM AND 2.758 INCHES MAXIMUM IN; Material: RUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM. 4 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.