The O-Ring, cataloged under National Stock Number 5331-01-526-6254, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Kalrez Usa, Llc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-526-6254 |
| Primary Part Number | K90300 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Kalrez Usa, Llc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.058 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Criticality Code Justification | AGAV |
| Center Hole Diameter | 0.261 INCHES MINIMUM AND 0.271 INCHES MAXIMUM IN |
| Material | RUBBER SILICONE CLASS Q |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| A9A01002-00616 | Greene Tweed & Co Inc (USA) |
| K90300 PRIMARY | Kalrez Usa, Llc (USA) |
| Reference | Meaning |
|---|---|
| 4074T58P56 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5331-01-526-6254 is a O-Ring, manufactured by Kalrez Usa, Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-526-6254 has 2 manufacturer part numbers on file: A9A01002-00616 (Greene Tweed & Co Inc), K90300 (Kalrez Usa, Llc).
Key specifications for K90300: Cross-Sectional Height: 0.058 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL; Criticality Code Justification: AGAV; Special Features: NEXT HIGHER ASSY IS NSN 2840-01-526-5791; POWER TURBINE ASSY. 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.