The Washer,flat, cataloged under National Stock Number 5310-01-646-6710, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Comsaco, Llc Dba Comsaco Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-646-6710 |
| Primary Part Number | X-FLW-BRS-10 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Comsaco, Llc Dba Comsaco Inc |
| Status | ACTIVE |
| Overall Diameter | 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | BLANK RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY AND ZINC ALLOY OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.214 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN |
| Thickness | 0.036 INCHES MINIMUM AND 0.065 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 |
|---|---|
| X-FLW-BRS-10 PRIMARY | Comsaco, Llc Dba Comsaco Inc (USA) |
| Reference | Meaning |
|---|---|
| 404-416 | D/9 Drawing number reference only Comsaco, Llc Dba Comsaco Inc |
NSN 5310-01-646-6710 is a Washer,flat, manufactured by Comsaco, Llc Dba Comsaco Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-646-6710 has 1 manufacturer part number on file: X-FLW-BRS-10 (Comsaco, Llc Dba Comsaco Inc).
2 possible matches (shared part number, not a government interchangeability claim): 6350-01-650-9956, 4130-01-730-4227. Verify interchangeability with system specifications before substitution.
Key specifications for X-FLW-BRS-10: Overall Diameter: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN; Cross-Sectional Shape Style: BLANK RECTANGULAR; Special Features: OEM COMSACO INC;3737 E.VIRGINIA BEACH BLVD;NORFOLK, VA;PHONE: 757-466-9188; Peripheral Shape Style: ROUND. 7 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.