The Bolt,square Neck, cataloged under National Stock Number 5306-00-044-5623, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5306-00-044-5623 |
| Primary Part Number | ASME-B18.5 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — No Item Name Available |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | CANCELLED |
| Fastener Length | 3.500 INCHES NOMINAL IN |
| Head Diameter | 0.563 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Surface Treatment | ZINC OVERALL |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Minimum Yield Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Hardness Rating | 95.0 ROCKWELL B NOMINAL OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Height | 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Head Style | ROUND |
| Thread Length | 0.750 INCHES MINIMUM IN |
| Thread Quantity Per Inch | 20 |
| Surface Treatment Document and Classification | ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Neck Length | 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| ASME-B18.5 | The American Society of Mechanical Engineers (USA) |
| FF-B-584 TY1CL1STAGR1 | General Services Administration Federal Supply Service (USA) |
| FF-B-584 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| MS35751-26 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| B18.5 | American National Standards Institute Incorporated Dba American National Standards Institute (USA) |
NSN 5306-00-044-5623 is a Bolt,square Neck, manufactured by The American Society of Mechanical Engineers, classified under FSC 5306 (No Item Name Available). Status: cancelled.
NSN 5306-00-044-5623 has 5 cross-referenced part numbers: ASME-B18.5 (The American Society of Mechanical Engineers), FF-B-584 TY1CL1STAGR1 (General Services Administration Federal Supply Service), FF-B-584 (Federal Specifications Promulgated by General Services Administration Washington DC), MS35751-26 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), B18.5 (American National Standards Institute Incorporated Dba American National Standards Institute).
There are 12 known substitutes for 5306-00-044-5623: 5306-00-010-9115, 5306-00-012-0955, 5306-00-012-6227 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for ASME-B18.5: Fastener Length: 3.500 INCHES NOMINAL IN; Head Diameter: 0.563 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN; Material: STEEL OVERALL; Surface Treatment: ZINC OVERALL. 17 total characteristics are documented in the Federal Logistics Information System.
NSN 5306-00-044-5623 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.