The Bolt,ribbed Shoulder, cataloged under National Stock Number 5306-00-237-8296, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Saginaw Products Corporation Dba Cignys. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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 | 5306-00-237-8296 |
| Primary Part Number | 6440 |
| Item Name | Bolt,ribbed Shoulder |
| FSC / FSG | 5306 / 53 — No Item Name Available |
| Manufacturer | Saginaw Products Corporation Dba Cignys |
| Status | CANCELLED |
| Head Style | FLAT CHAMFER |
| Head Height | 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | STEEL COMP 4140 OVERALL |
| Shoulder Diameter | 0.534 INCHES MINIMUM AND 0.539 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Length | 0.495 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 1.109 INCHES MINIMUM AND 1.141 INCHES MAXIMUM IN |
| Thread Series Designator | UNF |
| Thread Quantity Per Inch | 20 |
| Shoulder Shape | RIBBED FIRST SHOULDER |
| Thread Class | 2A A |
| Fastener Length | 1.859 INCHES MINIMUM AND 1.891 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Head Diameter | 0.812 INCHES MINIMUM AND 0.874 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
NSN 5306-00-237-8296 is a Bolt,ribbed Shoulder, manufactured by Saginaw Products Corporation Dba Cignys, classified under FSC 5306 (No Item Name Available). Status: cancelled.
NSN 5306-00-237-8296 has 2 cross-referenced part numbers: 6440 (Saginaw Products Corporation Dba Cignys), 03-006440 (Saginaw Products Corporation Dba Cignys).
There are 12 known substitutes for 5306-00-237-8296: 5306-00-673-3295, 3020-00-239-3000, 4730-00-277-7133 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 6440: Head Style: FLAT CHAMFER; Head Height: 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN; Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL; Surface Treatment: CADMIUM AND CHROMATE OVERALL. 17 total characteristics are documented in the Federal Logistics Information System.
NSN 5306-00-237-8296 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.