The Washer,flat, cataloged under National Stock Number 5310-00-138-4535, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-138-4535 |
| Primary Part Number | 8412532 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc |
| Status | ACTIVE |
| Overall Diameter | 2.250 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | BLACK OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.281 INCHES NOMINAL IN |
| Thickness | 0.219 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 |
|---|---|
| 8412532 PRIMARY | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc (USA) |
| Reference | Meaning |
|---|---|
| 8412532 | 3/9 Design control — primary reference General Motors Corp Electro-Motive Div |
NSN 5310-00-138-4535 is a Washer,flat, manufactured by Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-138-4535 has 1 manufacturer part number on file: 8412532 (Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc).
Key specifications for 8412532: Overall Diameter: 2.250 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Color: BLACK OVERALL; Peripheral Shape Style: ROUND. 8 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.