The Bolt,square Neck, cataloged under National Stock Number 5306-00-527-3522, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-527-3522 |
| Primary Part Number | FF571 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — No Item Name Available |
| Manufacturer | Federal Specifications Promulgated by General Services Administration Washington DC |
| Status | ACTIVE |
| Thread Quantity Per Inch | 20 |
| Neck Length | 0.219 INCHES NOMINAL IN |
| Material Document and Classification | FF-B-571 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Head Diameter | 0.563 INCHES NOMINAL IN |
| Neck Width | 0.250 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Height | 0.125 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Fastener Length | 4.750 INCHES NOMINAL IN |
| Head Style | BUTTON |
| Nondefinitive Spec/std Data | C2 TYPE AND C CLASS |
| Thread Direction | RIGHT-HAND |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Material | STEEL OVERALL |
| Minimum Tensile Strength | 48000 POUNDS PER SQUARE INCH LBS |
| Features Provided | SQUARE NUT |
| Thread Length | 0.875 INCHES MINIMUM IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 5306-00-527-3522 is a Bolt,square Neck, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5306 (No Item Name Available). Status: active.
NSN 5306-00-527-3522 has 3 cross-referenced part numbers: FF571 (Federal Specifications Promulgated by General Services Administration Washington DC), 70-4-46 (Department of the Air Force), 70-4-46 (Air Force Standard).
There are 4 known substitutes for 5306-00-527-3522: 5133-00-266-9470, 5342-00-523-3196, 3110-01-375-7559 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for FF571: Thread Quantity Per Inch: 20; Neck Length: 0.219 INCHES NOMINAL IN; Material Document and Classification: FF-B-571 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Head Diameter: 0.563 INCHES NOMINAL IN. 17 total characteristics are documented in the Federal Logistics Information System.