PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AN174H37Bolt,close Tolerance

Aeronautical Standards Group Dept of Navy and Air Force · NSN 5306-00-151-1063 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-151-1063 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-151-1063. Primary manufacturer part number: AN174H37.
Features
  • Bolt,close Tolerance — FSC 5306
  • Hole Type: DRILLED
  • Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD
  • Grip Diameter: 0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN
  • Thread Class: 3A A
  • Minimum Tensile Strength: 125000 POUNDS PER SQUARE INCH LBS
  • Hole Diameter: 0.046 INCHES NOMINAL IN
  • Material: STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 8740 or Steel Comp 8630 or Steel Comp 8735 or Steel Comp 4037 or Steel Comp 4130 or Steel Comp 4140 Overall construction
General Description

The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-151-1063, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Aeronautical Standards Group Dept of Navy and Air Force. Government technical data includes 26 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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: Cancelled.

Technical Specifications
ParameterValue
NSN5306-00-151-1063
Primary Part NumberAN174H37
Item NameBolt,close Tolerance
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerAeronautical Standards Group Dept of Navy and Air Force
StatusCANCELLED
Hole TypeDRILLED
Surface Finish63.0 MICROINCHES BEARING SURFACE OF HEAD
Grip Diameter0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN
Thread Class3A A
Minimum Tensile Strength125000 POUNDS PER SQUARE INCH LBS
Hole Diameter0.046 INCHES NOMINAL IN
MaterialSTEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL
Thread DirectionRIGHT-HAND
Thread Length0.436 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
Material Document and ClassificationMIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR AMS 6300 ASSN STD 4TH MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 6TH MATERIAL RESPONSE OVERALL
Hardness Rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
Head StyleHEXAGON
Thread Series DesignatorUNF
Thread Quantity Per Inch28
Hole Configuration StyleHEXAGON FLATS
Width Between Flats0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationQQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Shank Unthreaded Hole Diameter0.076 INCHES NOMINAL FIRST HOLE IN
Fastener Length3.890 INCHES MINIMUM AND 3.937 INCHES MAXIMUM IN
Surface Finish63.0 MICROINCHES GRIP
Grip Length3.422 INCHES MINIMUM AND 3.454 INCHES MAXIMUM IN
Head Height0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Hole Quantity1
Distance From Head Largest Bearing Surface to Shank Hole Center3.734 INCHES MINIMUM AND 3.766 INCHES MAXIMUM FIRST HOLE IN
Nominal Thread Diameter0.250 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5306-00-051-2338
HAZMATNo
Verified Substitutes 12
No Item Name Available
Bolt,machine
Bolt,machine
5306-00-051-2344NASM20074-05-40 SUCCESSOR
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Bolt,machine
Bolt,close Tolerance
Bolt,machine
Bolt,machine
5306-00-144-3686AN3-55 SUCCESSOR
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Bolt,machine
Cross-Reference Index
Part NumberManufacturer
AN174H37 Aeronautical Standards Group Dept of Navy and Air Force (USA)
AN174-37 Aeronautical Standards Group Dept of Navy and Air Force (USA)
B6812 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
SUCCESSOR 5306-00-051-2338 Bolt,machine
5306-00-180-0457SUCCESSOR
NO ITEM NAME AVAILABLE
5306-00-051-2343SUCCESSOR
BOLT,MACHINE
5306-00-051-2344SUCCESSOR
BOLT,MACHINE
NASM20074-05-40
5306-00-051-2349SUCCESSOR
BOLT,MACHINE
5306-00-141-4519SUCCESSOR
BOLT,CLOSE TOLERANCE
5306-00-141-4712SUCCESSOR
BOLT,MACHINE
5306-00-141-4716SUCCESSOR
BOLT,MACHINE
5306-00-144-3686SUCCESSOR
BOLT,MACHINE
AN3-55
5306-00-144-3692SUCCESSOR
BOLT,MACHINE
5306-00-144-3700SUCCESSOR
BOLT,MACHINE
5306-00-144-3711SUCCESSOR
BOLT,CLOSE TOLERANCE

Frequently Asked Questions

What is NSN 5306-00-151-1063?

NSN 5306-00-151-1063 is a Bolt,close Tolerance, manufactured by Aeronautical Standards Group Dept of Navy and Air Force, classified under FSC 5306 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5306-00-151-1063?

NSN 5306-00-151-1063 has 3 cross-referenced part numbers: AN174H37 (Aeronautical Standards Group Dept of Navy and Air Force), AN174-37 (Aeronautical Standards Group Dept of Navy and Air Force), B6812 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5306-00-151-1063?

There are 12 known substitutes for 5306-00-151-1063: 5306-00-180-0457, 5306-00-051-2338, 5306-00-051-2343 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AN174H37?

Key specifications for AN174H37: Hole Type: DRILLED; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Grip Diameter: 0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN; Thread Class: 3A A. 26 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-151-1063 still in active supply?

NSN 5306-00-151-1063 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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