The Washer,flat, cataloged under National Stock Number 5310-01-259-6358, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-259-6358 |
| Primary Part Number | 2CT408 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Overall Diameter | 0.660 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Features Provided | CASEHARDENED |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.318 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Thickness | 0.051 INCHES MINIMUM AND 0.080 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 |
|---|---|
| 2CT408 | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 7-949-000534 | 5/9 Secondary reference Minnpar, Llc Dba Minnpar |
| 7-949-000534 | 3/9 Design control — primary reference Grove U.s. Llc Dba Grove Us Llc |
| 2CT408 | 5/9 Secondary reference Oshkosh Corp |
NSN 5310-01-259-6358 is a Washer,flat, manufactured by Oshkosh Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-259-6358 has 1 manufacturer part number on file: 2CT408 (Oshkosh Defense Llc).
Key specifications for 2CT408: Overall Diameter: 0.660 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Features Provided: CASEHARDENED; 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.