The O-Ring, cataloged under National Stock Number 5331-01-573-6442, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-573-6442 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | ACTIVE |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Hardness Rating | 60.0 SHORE DUROMETER A NOMINAL |
| Material Document and Classification | MIL-R-25988 TYPE I CLASS 1.GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 0.530 INCHES MINIMUM AND 0.544 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-DTL-25988/3 | 4/1 Identification reference U.S. Government activity |
| M25988/3-311 | 2/2 Government specification standardization U.S. Government activity |
NSN 5331-01-573-6442 is a O-Ring, classified under FSC 5331, O-ring. Status: active.
Key specifications for 5331-01-573-6442: Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Hardness Rating: 60.0 SHORE DUROMETER A NOMINAL; Material Document and Classification: MIL-R-25988 TYPE I CLASS 1.GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE; Center Hole Diameter: 0.530 INCHES MINIMUM AND 0.544 INCHES MAXIMUM 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.
NSN 5331-01-573-6442 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.