The Washer,recessed, cataloged under National Stock Number 5310-00-757-5500, 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 14 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 | 5310-00-757-5500 |
| Primary Part Number | S6150-64044-101 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Surface Finish | 90.0 MICROINCHES ALL SURFACES |
| Surface Treatment Document and Classification | MIL-C-13924 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 6415 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.375 INCHES NOMINAL IN |
| Material Thickness | 0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN |
| Recess Diameter | 1.255 INCHES NOMINAL IN |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE FILM OVERALL |
| Test Data Document | 81349-MIL-I-6868 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 4340 OVERALL |
| Hole Diameter | 1.128 INCHES MINIMUM AND 1.131 INCHES MAXIMUM IN |
| Recess Angle | 90.0 DEGREES NOMINAL |
| 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 |
|---|---|
| S6150-64044-101 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5310-00-757-5500 is a Washer,recessed, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-757-5500 has 1 manufacturer part number on file: S6150-64044-101 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S6150-64044-101: Surface Finish: 90.0 MICROINCHES ALL SURFACES; Surface Treatment Document and Classification: MIL-C-13924 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM; Style Designator: RECESSED. 14 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.