The O-Ring, cataloged under National Stock Number 5331-01-528-8368, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hader-Seitz Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-528-8368 |
| Primary Part Number | 2190030 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Hader-Seitz Inc |
| Status | ACTIVE |
| Temp Rating | -20.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF |
| Outside Diameter | 7.025 INCHES NOMINAL IN |
| Supplementary Features | DUROMETER 70A (MEDIUM), ASTM D2000, SAE AS568, SAE J200 A |
| Material Document and Classification | STM D2000 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE |
| Color | BLACK |
| Center Hole Diameter | 6.475 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE NITRILE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5331-01-528-8368 is a O-Ring, manufactured by Hader-Seitz Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-528-8368 has 2 manufacturer part numbers on file: 9452K425 (Mcmaster-Carr Supply Co), 2190030 (Hader-Seitz Inc).
Key specifications for 2190030: Temp Rating: -20.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF; Outside Diameter: 7.025 INCHES NOMINAL IN; Supplementary Features: DUROMETER 70A (MEDIUM), ASTM D2000, SAE AS568, SAE J200 A; Material Document and Classification: STM D2000 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE. 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.