The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-141-4519, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 24 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5306-00-141-4519 |
| Primary Part Number | B6812 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — No Item Name Available |
| Manufacturer | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| Status | CANCELLED |
| Grip Length | 5.188 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 28 |
| Fastener Length | 5.656 INCHES NOMINAL IN |
| Grip Diameter | 0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN |
| Head Style | HEXAGON |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Hole Quantity | 1 |
| Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL |
| Head Height | 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Series Designator | UNF |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Hole Type | DRILLED |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OVERALL |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Hole Diameter | 0.046 INCHES NOMINAL IN |
| Material | STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL |
| Thread Length | 0.468 INCHES MINIMUM IN |
| Hole Configuration Style | HEXAGON FLATS |
| Thread Class | 3A A |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| B6812 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| AN174H55A | Aeronautical Standards Group Dept of Navy and Air Force (USA) |
| AN174-55A | Air Force-Navy Aeronautical Specifications Promulgated by Aeronautical Standards Group |
NSN 5306-00-141-4519 is a Bolt,close Tolerance, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5306 (No Item Name Available). Status: cancelled.
NSN 5306-00-141-4519 has 3 cross-referenced part numbers: B6812 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), AN174H55A (Aeronautical Standards Group Dept of Navy and Air Force), AN174-55A (Air Force-Navy Aeronautical Specifications Promulgated by Aeronautical Standards Group).
There are 12 known substitutes for 5306-00-141-4519: 5306-00-141-4507, 5306-00-151-1062, 5306-00-151-1063 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for B6812: Grip Length: 5.188 INCHES NOMINAL IN; Thread Quantity Per Inch: 28; Fastener Length: 5.656 INCHES NOMINAL IN; Grip Diameter: 0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN. 24 total characteristics are documented in the Federal Logistics Information System.
NSN 5306-00-141-4519 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.