The Washer,flat, cataloged under National Stock Number 5310-00-680-1579, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fraser Optics Llc Dba Fraser Optics Llc. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-680-1579 |
| Primary Part Number | CAV10-2B |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fraser Optics Llc Dba Fraser Optics Llc |
| Status | ACTIVE |
| Overall Diameter | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Features Provided | CASEHARDENED |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE FILM AND CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 301 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.094 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Thickness | 0.018 INCHES MINIMUM AND 0.020 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 |
|---|---|
| CAV10-2B | Fraser Optics Llc Dba Fraser Optics Llc (USA) |
| Reference | Meaning |
|---|---|
| CAV10-2B | 3/9 Design control — primary reference Recon/optical, Inc. |
NSN 5310-00-680-1579 is a Washer,flat, manufactured by Fraser Optics Llc Dba Fraser Optics Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-680-1579 has 1 manufacturer part number on file: CAV10-2B (Fraser Optics Llc Dba Fraser Optics Llc).
Key specifications for CAV10-2B: Overall Diameter: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Features Provided: CASEHARDENED. 11 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.