The O-Ring, cataloged under National Stock Number 5331-00-591-7543, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corp Div O-Ring Division. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5331-00-591-7543 |
| Primary Part Number | 2-116 N0951-75 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Temp Rating | -25.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Outside Diameter | 0.928 INCHES MINIMUM AND 0.958 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Elongation Percentage | 125 MAXIMUM |
| Center Hole Diameter | 0.728 INCHES MINIMUM AND 0.746 INCHES MAXIMUM 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 |
|---|---|
| 2-116 N0951-75 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 7F8607 | Hastings Deering (aust) Pty Ltd (AUS) |
| 7F8607 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 7F8607 | William Adams Pty Ltd (AUS) |
| 7F8607 | Westrac Pty Ltd (AUS) |
| Reference | Meaning |
|---|---|
| 2-116N951-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 2-116N951-75 | 3/9 Design control — primary reference Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
NSN 5331-00-591-7543 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-591-7543 has 5 manufacturer part numbers on file: 2-116 N0951-75 (Parker-Hannifin Corp Div O-Ring Division), 7F8607 (Hastings Deering (aust) Pty Ltd), 7F8607 (Caterpillar Inc Div Caterpillar Defense), 7F8607 (William Adams Pty Ltd), 7F8607 (Westrac Pty Ltd).
Key specifications for 2-116 N0951-75: Temp Rating: -25.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Outside Diameter: 0.928 INCHES MINIMUM AND 0.958 INCHES MAXIMUM IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL. 7 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.