The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-149-1936, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-149-1936 |
| Primary Part Number | 343178 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| Head Height | 0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN |
| Fastener Length | 2.080 INCHES MINIMUM AND 2.120 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | GM 4435-M CODE A FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.080 INCHES MINIMUM AND 1.480 INCHES MAXIMUM IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | GM 300-M FSCM 11862 MFR REF ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL |
| Thread Series Designator | UNRC |
| 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 |
|---|---|
| 343178 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 343178 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
NSN 5305-01-149-1936 is a Screw,cap,hexagon Head, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-149-1936 has 1 manufacturer part number on file: 343178 (General Motors Llc Dba General Motors Llc).
Key specifications for 343178: Head Height: 0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN; Fastener Length: 2.080 INCHES MINIMUM AND 2.120 INCHES MAXIMUM IN; Surface Treatment Document and Classification: GM 4435-M CODE A FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 1.080 INCHES MINIMUM AND 1.480 INCHES MAXIMUM IN. 16 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.