The Bolt,square Neck, cataloged under National Stock Number 5306-00-059-1225, 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 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-059-1225 |
| Primary Part Number | FFB571 |
| 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 Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Thread Quantity Per Inch | 20 |
| Nondefinitive Spec/std Data | C2 TYPE |
| Material | STEEL OVERALL |
| Material Document and Classification | FF-B-571 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Head Height | 0.125 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Minimum Tensile Strength | 48000 POUNDS PER SQUARE INCH LBS |
| Features Provided | SQUARE NUT |
| Head Diameter | 0.563 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Fastener Length | 1.500 INCHES NOMINAL IN |
| Neck Length | 0.219 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES MINIMUM IN |
| Head Style | BUTTON |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Neck Width | 0.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| FFB571 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
NSN 5306-00-059-1225 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 5306-00-059-1225 has 1 cross-referenced part number: FFB571 (Federal Specifications Promulgated by General Services Administration Washington DC).
There is 1 known substitute for 5306-00-059-1225: 5306-00-582-5952. Verify interchangeability with system specifications before substitution.
Key specifications for FFB571: Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Thread Quantity Per Inch: 20; Nondefinitive Spec/std Data: C2 TYPE; Material: STEEL OVERALL. 17 total characteristics are documented in the Federal Logistics Information System.