The Bolt,square Neck, cataloged under National Stock Number 5306-00-012-8439, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Army Weapons Command Attn Amswe-Ree-S. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-012-8439 |
| Primary Part Number | 128439 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — No Item Name Available |
| Manufacturer | Army Weapons Command Attn Amswe-Ree-S |
| Status | ACTIVE |
| Material | STEEL COMP 1010 OVERALL |
| Thread Class | 2A A |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Minimum Yield Strength | 40000 POUNDS PER SQUARE INCH LBS |
| Head Height | 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Hardness Rating | 79.0 ROCKWELL B MINIMUM AND 90.0 ROCKWELL B MAXIMUM OVERALL |
| Neck Width | 0.307 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN |
| Head Style | OVAL |
| Minimum Tensile Strength | 48000 POUNDS PER SQUARE INCH LBS |
| Thread Length | 0.875 INCHES MINIMUM IN |
| Thread Quantity Per Inch | 18 |
| Fastener Length | 1.469 INCHES MINIMUM AND 1.531 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.000 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN |
| Neck Length | 0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 128439 | Army Weapons Command Attn Amswe-Ree-S (USA) |
NSN 5306-00-012-8439 is a Bolt,square Neck, manufactured by Army Weapons Command Attn Amswe-Ree-S, classified under FSC 5306 (No Item Name Available). Status: active.
NSN 5306-00-012-8439 has 1 cross-referenced part number: 128439 (Army Weapons Command Attn Amswe-Ree-S).
There is 1 known substitute for 5306-00-012-8439: 5999-00-033-5512. Verify interchangeability with system specifications before substitution.
Key specifications for 128439: Material: STEEL COMP 1010 OVERALL; Thread Class: 2A A; Nominal Thread Diameter: 0.312 INCHES IN; Thread Direction: RIGHT-HAND. 18 total characteristics are documented in the Federal Logistics Information System.