The O-Ring, cataloged under National Stock Number 5331-01-521-8979, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corporation Div O-Ring Division. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-521-8979 |
| Primary Part Number | 41582N |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corporation Div O-Ring Division |
| Status | ACTIVE |
| Cross-Sectional Height | 0.134 INCHES MINIMUM AND 0.144 INCHES MAXIMUM IN |
| Hardness Rating | 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | PARKER (60363) MATERIAL N7021 MFR REF SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 19.500 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| 41582N PRIMARY | Parker-Hannifin Corporation Div O-Ring Division (USA) |
NSN 5331-01-521-8979 is a O-Ring, manufactured by Parker-Hannifin Corporation Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-521-8979 has 1 manufacturer part number on file: 41582N (Parker-Hannifin Corporation Div O-Ring Division).
Key specifications for 41582N: Cross-Sectional Height: 0.134 INCHES MINIMUM AND 0.144 INCHES MAXIMUM IN; Hardness Rating: 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: PARKER (60363) MATERIAL N7021 MFR REF SINGLE MATERIAL RESPONSE; Special Features: SLPICED O-CORD 0.139 + OR - 0.005 INCHES C/S CUT TO 61.696 + OR - 0125 INCHES LONG -- A SOLID PIECE WITH A NOMIAL 19.500 IN MADE FROM N7021 NITRILE 70 + OR - 5 DUROMETER IN. 5 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.