The Washer,recessed, cataloged under National Stock Number 5310-00-274-9613, 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 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-274-9613 |
| Primary Part Number | 8028365 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc |
| Status | ACTIVE |
| Top Recess Diameter | 1.609 INCHES NOMINAL IN |
| Bottom Recess Diameter | 1.609 INCHES NOMINAL IN |
| Hardness Rating | 40.0 ROCKWELL C NOMINAL |
| Top Recess Angle | 90.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.500 INCHES NOMINAL IN |
| Bottom Recess Angle | 90.0 DEGREES NOMINAL |
| Material | STEEL COMP 1045 OVERALL |
| Hole Diameter | 1.578 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 |
|---|---|
| 8028365 PRIMARY | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc (USA) |
| Reference | Meaning |
|---|---|
| 8028365 | 5/9 Secondary reference General Motors Corp |
| 8028365 | 3/9 Design control — primary reference General Motors Corp Electro-Motive Div |
| 8075245PC8028365 | 5/9 Secondary reference General Motors Corp |
NSN 5310-00-274-9613 is a Washer,recessed, manufactured by Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-274-9613 has 1 manufacturer part number on file: 8028365 (Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc).
Key specifications for 8028365: Top Recess Diameter: 1.609 INCHES NOMINAL IN; Bottom Recess Diameter: 1.609 INCHES NOMINAL IN; Hardness Rating: 40.0 ROCKWELL C NOMINAL; Top Recess Angle: 90.0 DEGREES NOMINAL. 10 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.