The O-Ring, cataloged under National Stock Number 5331-00-831-2438, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Cooper Machinery Services Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Cooper Machinery Services Llc (CAGE 14541) |
| Parameter | Value |
|---|---|
| NSN | 5331-00-831-2438 |
| Primary Part Number | CSA-337-5-64 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Cooper Machinery Services Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| CSA-337-5-64 PRIMARY | Cooper Machinery Services Llc (USA) |
| Reference | Meaning |
|---|---|
| 35704663 | 5/9 Secondary reference Energy Services Group Div of Cooper Industries Inc |
| 37704663 | 5/9 Secondary reference Energy Services Group Div of Cooper Industries Inc |
| 35704665 | 5/9 Secondary reference Energy Services Group Div of Cooper Industries Inc |
| FS52527U | 5/9 Secondary reference Energy Services Group Div of Cooper Industries Inc |
NSN 5331-00-831-2438 is a O-Ring, manufactured by Cooper Machinery Services Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-831-2438 has 1 manufacturer part number on file: CSA-337-5-64 (Cooper Machinery Services Llc).
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.