The O-Ring, cataloged under National Stock Number 5331-01-391-1080, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-391-1080 |
| Primary Part Number | 5-156L1223-60 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Temp Rating | -73.0 CELSIUS AND 175.0 CELSIUS DEGC |
| Cross-Sectional Height | 0.056 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN |
| Hardness Rating | 55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | MIL-R-25988, TY 1, CL 1, GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 0.564 INCHES MINIMUM AND 0.580 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 |
| Part Number | Manufacturer |
|---|---|
| 5-156L1223-60 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| Reference | Meaning |
|---|---|
| ES9625-11 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| ES9625-11 | 7/9 Vendor item drawing reference Drs Sustainment Systems, Inc. |
| 5-156L0946-60 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
NSN 5331-01-391-1080 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-391-1080 has 1 manufacturer part number on file: 5-156L1223-60 (Parker-Hannifin Corp Div O-Ring Division).
Key specifications for 5-156L1223-60: Temp Rating: -73.0 CELSIUS AND 175.0 CELSIUS DEGC; Cross-Sectional Height: 0.056 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN; Hardness Rating: 55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: MIL-R-25988, TY 1, CL 1, GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE. 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.