The Bolt,machine, cataloged under National Stock Number 5306-00-637-8770, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Briggs and Stratton Corp. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-637-8770 |
| Primary Part Number | 91439 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — No Item Name Available |
| Manufacturer | Briggs and Stratton Corp |
| Status | ACTIVE |
| Nondefinitive Spec/std Data | 3 TYPE AND 1 GRADE |
| Head Height | 0.156 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Fastener Length | 0.375 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 20 |
| Hardness Rating | 93.9 ROCKWELL B NOMINAL OVERALL |
| Head Style | HEXAGON |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL OVERALL |
| Thread Length | 0.375 INCHES MAXIMUM IN |
| Features Provided | FINISHED HEAD |
| Width Between Flats | 0.425 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 91439 PRIMARY | Briggs and Stratton Corp (USA) |
| FFB575TYPE3GRADE1 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
NSN 5306-00-637-8770 is a Bolt,machine, manufactured by Briggs and Stratton Corp, classified under FSC 5306 (No Item Name Available). Status: active.
NSN 5306-00-637-8770 has 2 cross-referenced part numbers: 91439 (Briggs and Stratton Corp), FFB575TYPE3GRADE1 (Federal Specifications Promulgated by General Services Administration Washington DC).
There are 12 known substitutes for 5306-00-637-8770: 5306-00-174-9546, 5306-00-680-7219, 2915-00-024-6069 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 91439: Nondefinitive Spec/std Data: 3 TYPE AND 1 GRADE; Head Height: 0.156 INCHES NOMINAL IN; Thread Class: 2A A; Thread Direction: RIGHT-HAND. 15 total characteristics are documented in the Federal Logistics Information System.