The O-Ring, cataloged under National Stock Number 5331-00-148-1065, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Freudenberg-Nok General Partnership Automotive Aftermarket Div. Government technical data includes 4 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-148-1065 |
| Primary Part Number | 2637511-238 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Freudenberg-Nok General Partnership Automotive Aftermarket Div |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Outside Diameter | 3.762 INCHES NOMINAL IN |
| Center Hole Diameter | 3.469 INCHES MINIMUM AND 3.499 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 2637511-238 PRIMARY | Freudenberg-Nok General Partnership Automotive Aftermarket Div (USA) |
| Reference | Meaning |
|---|---|
| ARP568-238IDSA6865 | 5/9 Secondary reference Freudenberg-Nok General Partnership Automotive Aftermarket Div |
| 2637511-238 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| ARP238-6865 | 5/9 Secondary reference Freudenberg-Nok General Partnership |
| ARP568-238IDSA6865 | 5/9 Secondary reference Freudenberg-Nok General Partnership |
| ARP238-6865 | 5/9 Secondary reference Freudenberg-Nok General Partnership Automotive Aftermarket Div |
NSN 5331-00-148-1065 is a O-Ring, manufactured by Freudenberg-Nok General Partnership Automotive Aftermarket Div, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-148-1065 has 1 manufacturer part number on file: 2637511-238 (Freudenberg-Nok General Partnership Automotive Aftermarket Div).
Key specifications for 2637511-238: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Outside Diameter: 3.762 INCHES NOMINAL IN; Center Hole Diameter: 3.469 INCHES MINIMUM AND 3.499 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 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.