The O-Ring, cataloged under National Stock Number 5331-01-109-7499, 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 6 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-109-7499 |
| Primary Part Number | C0557 2-240 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Temp Rating | -35.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Outside Diameter | 3.976 INCHES MINIMUM AND 4.048 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 3.706 INCHES MINIMUM AND 3.762 INCHES MAXIMUM IN |
| Material | RUBBER CHLOROPRENE CLASS CR |
| 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 |
|---|---|
| C0557 2-240 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| Reference | Meaning |
|---|---|
| 364-48946-000 ITEM 35 | C/1 Advisory reference — outside the item-of-supply concept Johnson Controls Navy Systems, Llc |
| 028-12925-000 | C/1 Advisory reference — outside the item-of-supply concept Johnson Controls Navy Systems, Llc |
| 2-240C557-70 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 290096 | C/1 Advisory reference — outside the item-of-supply concept Grove U.s. Llc Dba Grove Us Llc |
| AS568-240 NEOPR ENE-1 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 2-240C944-70 | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corp Div O-Ring Division |
NSN 5331-01-109-7499 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-109-7499 has 1 manufacturer part number on file: C0557 2-240 (Parker-Hannifin Corp Div O-Ring Division).
Key specifications for C0557 2-240: Temp Rating: -35.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Outside Diameter: 3.976 INCHES MINIMUM AND 4.048 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL. 6 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.