The Bolt,square Neck, cataloged under National Stock Number 5306-00-012-6657, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 16 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5306-00-012-6657 |
| Primary Part Number | 126657 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — No Item Name Available |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | CANCELLED |
| Head Diameter | 0.688 INCHES NOMINAL IN |
| Neck Width | 0.307 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Thread Class | 2A A |
| Neck Length | 0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Fastener Length | 2.750 INCHES NOMINAL IN |
| Thread Length | 0.875 INCHES MINIMUM IN |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Thread Direction | RIGHT-HAND |
| Head Style | BUTTON |
| Hardness Rating | 95.0 ROCKWELL B MAXIMUM OVERALL |
| Thread Quantity Per Inch | 18 |
| Head Height | 0.156 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 126657 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5306-00-012-6657 is a Bolt,square Neck, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5306 (No Item Name Available). Status: cancelled.
NSN 5306-00-012-6657 has 1 cross-referenced part number: 126657 (U S Army Tank Automotive Command Amsta-Im-Mm).
There are 5 known substitutes for 5306-00-012-6657: 4320-00-308-8020, 5355-00-322-0268, 5985-00-479-3431 and 2 more. Verify interchangeability with system specifications before substitution.
Key specifications for 126657: Head Diameter: 0.688 INCHES NOMINAL IN; Neck Width: 0.307 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN; Material: STEEL OVERALL; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC). 16 total characteristics are documented in the Federal Logistics Information System.
NSN 5306-00-012-6657 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.