The Washer,flat, cataloged under National Stock Number 5310-01-062-1531, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Heil Trailer International Llc. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-062-1531 |
| Primary Part Number | M10HN135 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Heil Trailer International Llc |
| Status | ACTIVE |
| Overall Diameter | 1.750 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.275 INCHES MINIMUM AND 1.285 INCHES MAXIMUM IN |
| Thickness | 0.030 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 |
|---|---|
| M10HN135 PRIMARY | Heil Trailer International Llc (USA) |
| Reference | Meaning |
|---|---|
| 403145 | 5/9 Secondary reference Standard Forge and Axle Co Inc |
| M10HH135 | 5/9 Secondary reference Dana Corp Spicer Trailer Axle Plant |
| M10HN135 | 5/9 Secondary reference Dana Corp Spicer Trailer Axle Plant |
NSN 5310-01-062-1531 is a Washer,flat, manufactured by Heil Trailer International Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-062-1531 has 1 manufacturer part number on file: M10HN135 (Heil Trailer International Llc).
1 possible match (shared part number, not a government interchangeability claim): 1680-01-554-9504. Verify interchangeability with system specifications before substitution.
Key specifications for M10HN135: Overall Diameter: 1.750 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: STEEL OVERALL. 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.