The O-Ring, cataloged under National Stock Number 5331-01-528-1457, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Ampco Pumps Company Llc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-528-1457 |
| Primary Part Number | GX5099300 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Ampco Pumps Company Llc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.062 INCHES NOMINAL IN |
| Center Hole Diameter | 1.375 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| RCH2 3X3X10 DETAIL 21 | Ampco Pumps Company Llc (USA) |
| GX5099300 PRIMARY | Ampco Pumps Company Llc (USA) |
| Reference | Meaning |
|---|---|
| GX099300 | 5/9 Secondary reference Ampco Pumps Company Llc |
NSN 5331-01-528-1457 is a O-Ring, manufactured by Ampco Pumps Company Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-528-1457 has 2 manufacturer part numbers on file: RCH2 3X3X10 DETAIL 21 (Ampco Pumps Company Llc), GX5099300 (Ampco Pumps Company Llc).
Key specifications for GX5099300: Cross-Sectional Height: 0.062 INCHES NOMINAL IN; Special Features: OUTSIDE DIAMETER IS 1.500 IN IN; Center Hole Diameter: 1.375 INCHES NOMINAL IN; End Item Identification: IMPELLER / SLEEVE FOR A RCH2 3X3 PUMP. 3 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.