The Screw,assembled Washer, cataloged under National Stock Number 5305-01-159-2781, 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 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-159-2781 |
| Primary Part Number | 11500999 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Nonmachine Nominal Thread Diameter | 6.3 MILLIMETERS MM |
| Head Height | 4.37 MILLIMETERS MINIMUM AND 4.83 MILLIMETERS MAXIMUM MM |
| Fastener Length | 38.70 MILLIMETERS MINIMUM AND 41.30 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 | 1.81 |
| Primary Washer Outside Diameter | 16.57 MILLIMETERS MINIMUM AND 17.00 MILLIMETERS MAXIMUM MM |
| Thread Length | 36.44 MILLIMETERS MAXIMUM MM |
| Nonmachine Thread Style | GIMLET POINT (TYPE A, AB OR BA) |
| Material Document and Classification | GM 6010-M FMSC11862 MFR REF SINGLE MATERIAL RESPONSE FASTENER |
| Head Style | HEXAGON |
| Primary Washer Style | FLAT |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 1.20 MILLIMETERS MINIMUM AND 1.75 MILLIMETERS MAXIMUM MM |
| Width Between Flats | 9.78 MILLIMETERS MINIMUM AND 10.00 MILLIMETERS MAXIMUM MM |
| Surface Treatment | PHOSPHATE OVERALL |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Material | STEEL PRIMARY WASHER |
| Material | STEEL FASTENER |
| 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 |
|---|---|
| 11500085 | General Motors Llc Dba General Motors Llc (USA) |
| 11500999 PRIMARY | General Motors Corp (USA) |
| 11500999 | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 11500085 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 11500999 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
NSN 5305-01-159-2781 is a Screw,assembled Washer, manufactured by General Motors Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-159-2781 has 3 manufacturer part numbers on file: 11500085 (General Motors Llc Dba General Motors Llc), 11500999 (General Motors Corp), 11500999 (General Motors Llc Dba General Motors Llc).
Key specifications for 11500999: Nonmachine Nominal Thread Diameter: 6.3 MILLIMETERS MM; Head Height: 4.37 MILLIMETERS MINIMUM AND 4.83 MILLIMETERS MAXIMUM MM; Fastener Length: 38.70 MILLIMETERS MINIMUM AND 41.30 MILLIMETERS MAXIMUM MM; Surface Treatment Document and Classification: GM 4435-M CODE A FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 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.