The Washer,key, cataloged under National Stock Number 5310-00-558-7542, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Westinghouse Electric Corp. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-558-7542 |
| Primary Part Number | 1JH5097PC21 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Overall Distance Including Keys | 2.000 INCHES NOMINAL IN |
| Third Hole Diameter | 0.875 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 1.250 INCHES NOMINAL IN |
| Material Thickness | 0.062 INCHES NOMINAL IN |
| Tapered Key Minor Width | 0.875 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Tapered Key Major Width | 1.125 INCHES NOMINAL IN |
| Hole Diameter | 0.656 INCHES NOMINAL IN |
| 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 |
|---|---|
| 1JH5097PC21 PRIMARY | Westinghouse Electric Corp (USA) |
| 317088B PRIMARY | Westinghouse Electric Corp (USA) |
| 909D158PC6 PRIMARY | Westinghouse Electric Corp (USA) |
| 1JA5626REVBPC3 PRIMARY | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 3183564REVBPC3 | 3/2 Design control — primary reference U.S. Government activity |
| 1JA5626REVBPC3 | 3/2 Design control — primary reference U.S. Government activity |
| 317088B | 3/2 Design control — primary reference U.S. Government activity |
| 317088-B | C/1 Advisory reference — outside the item-of-supply concept Westinghouse Electric Corp Power Generation-Generator Div |
NSN 5310-00-558-7542 is a Washer,key, manufactured by Westinghouse Electric Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-558-7542 has 4 manufacturer part numbers on file: 1JH5097PC21 (Westinghouse Electric Corp), 317088B (Westinghouse Electric Corp), 909D158PC6 (Westinghouse Electric Corp), 1JA5626REVBPC3 (Westinghouse Electric Corp).
Key specifications for 1JH5097PC21: Overall Distance Including Keys: 2.000 INCHES NOMINAL IN; Third Hole Diameter: 0.875 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 1.250 INCHES NOMINAL IN. 9 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.