The Washer,flat, cataloged under National Stock Number 5310-00-141-1741, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Komatsu America Corp.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-141-1741 |
| Primary Part Number | 59649D |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Komatsu America Corp. |
| Status | ACTIVE |
| Overall Diameter | 0.560 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN |
| Hardness Rating | 40.0 ROCKWELL B MINIMUM AND 65.0 ROCKWELL B MAXIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.385 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN |
| Thickness | 0.050 INCHES MINIMUM AND 0.055 INCHES MAXIMUM 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 |
|---|---|
| 59649D | Komatsu America Corp. (USA) |
| Reference | Meaning |
|---|---|
| 59649D | 5/9 Secondary reference U.S. Government activity |
| 59649D | 3/9 Design control — primary reference Komatsu American Intl Co |
NSN 5310-00-141-1741 is a Washer,flat, manufactured by Komatsu America Corp., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-141-1741 has 1 manufacturer part number on file: 59649D (Komatsu America Corp.).
Key specifications for 59649D: Overall Diameter: 0.560 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN; Hardness Rating: 40.0 ROCKWELL B MINIMUM AND 65.0 ROCKWELL B MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR; 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.