The Bolt,square Neck, cataloged under National Stock Number 5306-00-638-6658, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Joslyn Corp. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 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 | 5306-00-638-6658 |
| Primary Part Number | J8636 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — No Item Name Available |
| Manufacturer | Joslyn Corp |
| Status | CANCELLED |
| Head Style | BUTTON |
| Features Provided | SQUARE NUT |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Surface Treatment | ZINC OVERALL |
| Surface Treatment Document and Classification | ASTM A153 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Head Diameter | 0.782 INCHES MINIMUM AND 0.844 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Neck Length | 0.188 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Quantity Per Inch | 16 |
| Fastener Length | 6.000 INCHES NOMINAL IN |
| Neck Width | 0.368 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN |
| Thread Length | 3.000 INCHES MINIMUM IN |
| Material | STEEL OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Height | 0.188 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| Successor | 6530-01-591-9636 (2221030) |
| HAZMAT | No |
NSN 5306-00-638-6658 is a Bolt,square Neck, manufactured by Joslyn Corp, classified under FSC 5306 (No Item Name Available). Status: cancelled.
NSN 5306-00-638-6658 has 4 cross-referenced part numbers: 9636 (Hubbard and Company), 8636 (General Electric Company), DF1C6 (Cooper Power Systems Inc), J8636 (Joslyn Corp).
There are 12 known substitutes for 5306-00-638-6658: 5306-00-004-3137, 6530-01-591-9636, 2530-00-026-0255 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for J8636: Head Style: BUTTON; Features Provided: SQUARE NUT; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Surface Treatment: ZINC OVERALL. 16 total characteristics are documented in the Federal Logistics Information System.
NSN 5306-00-638-6658 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.