The Washer,flat, cataloged under National Stock Number 5310-01-646-0579, 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 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-646-0579 |
| Primary Part Number | J2655FBR0375S1P |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Overall Diameter | 1.000 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | BLANK RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OR STEEL COMP 304L OR STEEL COMP 316L OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.406 INCHES NOMINAL IN |
| Thickness | 0.063 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 |
|---|---|
| 588-7666799 ITEM 8 | Naval Sea Systems Command (USA) |
| J2655FBR0375S1P PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| J2655 | 5/9 Secondary reference U.S. Government activity |
| J2655FBR0375S1P | 5/9 Secondary reference U.S. Government activity |
| J2655 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 5310-01-646-0579 is a Washer,flat, manufactured by Sae International Dba Sae International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-646-0579 has 2 manufacturer part numbers on file: 588-7666799 ITEM 8 (Naval Sea Systems Command), J2655FBR0375S1P (Sae International Dba Sae International).
Key specifications for J2655FBR0375S1P: Overall Diameter: 1.000 INCHES NOMINAL IN; Cross-Sectional Shape Style: BLANK RECTANGULAR; Surface Treatment: PASSIVATE OVERALL; 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.