The Washer,flat, cataloged under National Stock Number 5310-01-305-2587, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 15 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 | 5310-01-305-2587 |
| Primary Part Number | 65651-06114-102 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES ALL SURFACES |
| Outside Left Corner Chamfer Angle | 45.0 DEGREES NOMINAL |
| Surface Treatment Document and Classification | SS8435,CAGE CODE 78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN |
| Hardness Rating | 331.0 BRINELL MINIMUM AND 401.0 BRINELL MAXIMUM |
| Material Document and Classification | AMS 5622 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Right Corner Chamfer Angle | 45.0 DEGREES NOMINAL |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Test Data Document | 78286-SS8805 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | STEEL COMP 630 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.156 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Thickness | 0.115 INCHES MINIMUM AND 0.135 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 |
|---|---|
| 65651-06114-102 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5310-01-305-2587 is a Washer,flat, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-305-2587 has 1 manufacturer part number on file: 65651-06114-102 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 65651-06114-102: Surface Finish: 63.0 MICROINCHES ALL SURFACES; Outside Left Corner Chamfer Angle: 45.0 DEGREES NOMINAL; Surface Treatment Document and Classification: SS8435,CAGE CODE 78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN. 15 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.