The Washer,flat, cataloged under National Stock Number 5310-01-666-4975, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-666-4975 |
| Primary Part Number | 94708A313 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Overall Diameter | 0.625 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | BLACK OVERALL |
| Surface Treatment | RUBBER OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.275 INCHES NOMINAL IN |
| Thickness | 0.086 INCHES MINIMUM AND 0.116 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 |
|---|---|
| 94708A313 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5310-01-666-4975 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-666-4975 has 1 manufacturer part number on file: 94708A313 (Mcmaster-Carr Supply Co).
Key specifications for 94708A313: Overall Diameter: 0.625 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Color: BLACK OVERALL; Special Features: MATERIAL HOT-DIPPED GALVANIZED STEEL;SEAL MATERIAL NEOPRENE RUBBER;FOR SCREW SIZE 1/4IN;METAL BONDED WASHER;TEMPERATURE RANGE -40 TO 250 DEGREES FARENHEIT;SEAL HARDNESS DUROMETER 65A;ROHS COMPLIANT;STRONGER SEAL THAN METAL OR RUBBER ALONE;GOOD OIL AND ABRASION RESISTANCE;REUSABLE;CORROSION RESISTANT IN WET ENVIRONMENTS A. 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.