The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-148-3687, 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 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-148-3687 |
| Primary Part Number | 371603 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.070 INCHES MINIMUM IN |
| Head Height | 0.505 INCHES MAXIMUM IN |
| Fastener Length | 12.312 INCHES MINIMUM AND 12.500 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | GM 4435-M CODE A,FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 1.000 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN |
| Thread Length | 3.312 INCHES MINIMUM AND 3.885 INCHES MAXIMUM IN |
| Hardness Rating | 85.0 ROCKWELL B MINIMUM AND 100.0 ROCKWELL B MAXIMUM OVERALL |
| Material Document and Classification | GM 260-M,FSCM 11862 MFR REF ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Minimum Tensile Strength | 69000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL 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 |
|---|---|
| 371603 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 14061300 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 371603 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
NSN 5305-01-148-3687 is a Screw,cap,hexagon Head, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-148-3687 has 1 manufacturer part number on file: 371603 (General Motors Llc Dba General Motors Llc).
2 possible matches (shared part number, not a government interchangeability claim): 6530-01-318-0485, 5330-01-364-0424. Verify interchangeability with system specifications before substitution.
Key specifications for 371603: Extended Washer Thickness: 0.070 INCHES MINIMUM IN; Head Height: 0.505 INCHES MAXIMUM IN; Fastener Length: 12.312 INCHES MINIMUM AND 12.500 INCHES MAXIMUM IN; Surface Treatment Document and Classification: GM 4435-M CODE A,FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 18 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.