The Screw,assembled Washer, cataloged under National Stock Number 5305-01-159-2777, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is General Motors Corp. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-159-2777 |
| Primary Part Number | 11509024 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Head Height | 4.1 MILLIMETERS MINIMUM AND 4.7 MILLIMETERS MAXIMUM MM |
| Fastener Length | 19.20 MILLIMETERS MINIMUM AND 20.00 MILLIMETERS MAXIMUM MM |
| Surface Treatment Document and Classification | GM 4435-M CODE A FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Pitch in Millimeters | 1.0 |
| Primary Washer Outside Diameter | 12.07 MILLIMETERS MINIMUM AND 12.50 MILLIMETERS MAXIMUM MM |
| Thread Length | 16.2 MILLIMETERS MAXIMUM MM |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM PRIMARY WASHER |
| Material Document and Classification | SAE ASSN STD ALL MATERIAL RESPONSES PRIMARY WASHER |
| Material Document and Classification | GM 500-M 9.8 FSCM 11862 MFR REF SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 6.0 MILLIMETERS MM |
| Head Style | HEXAGON |
| Primary Washer Style | SPRING TENSION |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 1.5 MILLIMETERS MINIMUM AND 1.8 MILLIMETERS MAXIMUM MM |
| Width Between Flats | 9.78 MILLIMETERS MINIMUM AND 10.00 MILLIMETERS MAXIMUM MM |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL OVERALL |
| Thread Series Designator | M |
| Washer Quantity | 1 |
| 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 |
|---|---|
| 11509024 PRIMARY | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 11508247 | 5/9 Secondary reference General Motors Corp |
| 11508247 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
NSN 5305-01-159-2777 is a Screw,assembled Washer, manufactured by General Motors Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-159-2777 has 1 manufacturer part number on file: 11509024 (General Motors Corp).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-580-0432. Verify interchangeability with system specifications before substitution.
Key specifications for 11509024: Head Height: 4.1 MILLIMETERS MINIMUM AND 4.7 MILLIMETERS MAXIMUM MM; Fastener Length: 19.20 MILLIMETERS MINIMUM AND 20.00 MILLIMETERS MAXIMUM MM; Surface Treatment Document and Classification: GM 4435-M CODE A FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Pitch in Millimeters: 1.0. 19 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.