The O-Ring, cataloged under National Stock Number 5331-01-321-7201, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-321-7201 |
| Primary Part Number | 257-0076 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division |
| Status | ACTIVE |
| Cross-Sectional Height | 0.098 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN |
| Center Hole Diameter | 3.717 INCHES MINIMUM AND 3.757 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5331-01-321-7201 is a O-Ring, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-321-7201 has 3 manufacturer part numbers on file: 6283971 (Technical Wire Products, Llc Dba Twp), 257-0076 (Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division), 6283971 (Naval Sea Systems Command).
Key specifications for 257-0076: Cross-Sectional Height: 0.098 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN; Center Hole Diameter: 3.717 INCHES MINIMUM AND 3.757 INCHES MAXIMUM IN; End Item Identification: OA15686 MK26 MOD0 GMLS; Material: RUBBER FLUOROSILICONE CLASS FQ. 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.