The Bolt,square Neck, cataloged under National Stock Number 5306-01-399-3109, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is J. W. Speaker Corporation Dba Jw Speaker Corp. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-399-3109 |
| Primary Part Number | 5340940 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | J. W. Speaker Corporation Dba Jw Speaker Corp |
| Status | ACTIVE |
| Neck Length | 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Head Height | 0.188 INCHES MINIMUM AND 0.288 INCHES MAXIMUM IN |
| Fastener Length | 0.970 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN |
| Thread Length | 0.751 INCHES MINIMUM AND 0.832 INCHES MAXIMUM IN |
| Material Document and Classification | SAE J429, GRADE 2 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.368 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN |
| Color | YELLOW OVERALL |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.782 INCHES MINIMUM AND 0.844 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 |
| Part Number | Manufacturer |
|---|---|
| 5340940 PRIMARY | J. W. Speaker Corporation Dba Jw Speaker Corp (USA) |
NSN 5306-01-399-3109 is a Bolt,square Neck, manufactured by J. W. Speaker Corporation Dba Jw Speaker Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-399-3109 has 1 manufacturer part number on file: 5340940 (J. W. Speaker Corporation Dba Jw Speaker Corp).
Key specifications for 5340940: Neck Length: 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN; Head Height: 0.188 INCHES MINIMUM AND 0.288 INCHES MAXIMUM IN; Fastener Length: 0.970 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN; Thread Length: 0.751 INCHES MINIMUM AND 0.832 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.