The Bolt,square Neck, cataloged under National Stock Number 5306-00-042-7114, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-042-7114 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Neck Length | 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Fastener Length | 2.500 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | 24617 4252-M ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.875 INCHES MINIMUM IN |
| Hardness Rating | 79.0 ROCKWELL B MINIMUM AND 90.0 ROCKWELL B MAXIMUM OVERALL |
| Material Document and Classification | GM 255M,GENERAL MOTORS CORP MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.307 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND ZINC OVERALL |
| Minimum Tensile Strength | 48000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 40000 POUNDS PER SQUARE INCH LBS |
| Countersink Angle | 114.0 DEGREES NOMINAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.750 INCHES MINIMUM AND 0.770 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 427114 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 427114 | 3/9 Design control — primary reference General Motors Corp |
NSN 5306-00-042-7114 is a Bolt,square Neck, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-042-7114: Neck Length: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Fastener Length: 2.500 INCHES NOMINAL IN; Surface Treatment Document and Classification: 24617 4252-M ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.875 INCHES MINIMUM IN. 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.