The Washer,flat, cataloged under National Stock Number 5310-01-609-4645, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-609-4645 |
| Primary Part Number | J2655FAN0375G1Z |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Overall Diameter | 0.812 INCHES NOMINAL IN |
| Hardness Rating | 90.0 ROCKWELL B MINIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.406 INCHES NOMINAL IN |
| Thickness | 0.065 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 |
|---|---|
| 302-8278673ITEM37 | Naval Sea Systems Command (USA) |
| J2655FAN0375G1Z PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| J2655FAN0375G1Z | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-01-609-4645 is a Washer,flat, manufactured by Sae International Dba Sae International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-609-4645 has 2 manufacturer part numbers on file: 302-8278673ITEM37 (Naval Sea Systems Command), J2655FAN0375G1Z (Sae International Dba Sae International).
Key specifications for J2655FAN0375G1Z: Overall Diameter: 0.812 INCHES NOMINAL IN; Hardness Rating: 90.0 ROCKWELL B MINIMUM; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: ZINC OVERALL. 9 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.