The O-Ring, cataloged under National Stock Number 5331-01-564-9571, 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 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5331-01-564-9571 |
| Primary Part Number | 136-7226 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Cross-Sectional Height | 1.8 MILLIMETERS NOMINAL MM |
| Center Hole Diameter | 15.7 MILLIMETERS NOMINAL MM |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| 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 |
|---|---|
| 23KP471 | Oshkosh Defense Llc (USA) |
| 50028855 | Rheinmetall Bae Systems Land Limited (GBR) |
| 136-7226 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 23KP471 | 5/9 Secondary reference Oshkosh Corp |
| 136-7226 | 5/9 Secondary reference Caterpillar of Australia Pty Ltd |
NSN 5331-01-564-9571 is a O-Ring, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-564-9571 has 3 manufacturer part numbers on file: 23KP471 (Oshkosh Defense Llc), 50028855 (Rheinmetall Bae Systems Land Limited), 136-7226 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 136-7226: Cross-Sectional Height: 1.8 MILLIMETERS NOMINAL MM; Center Hole Diameter: 15.7 MILLIMETERS NOMINAL MM; End Item Identification: MRAP - M-ATV; Material: RUBBER FLUOROCARBON CLASS FPM. 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.