PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AN3-4Bolt,machine

Aeronautical Standards Group Dept of Navy and Air Force · NSN 5306-00-144-3646 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-144-3646 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-144-3646. Primary manufacturer part number: AN3-4.
Features
  • Bolt,machine — FSC 5306
  • Fastener Length: 0.531 INCHES NOMINAL IN
  • Thread Direction: RIGHT-HAND
  • Thread Length: 0.406 INCHES MINIMUM IN
  • Nominal Thread Diameter: 0.190 INCHES IN
  • Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
  • Grip Length: 0.125 INCHES NOMINAL IN
  • Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 4140 or Steel Comp 8740 or Steel Comp 8630 or Steel Comp 8735 or Steel Comp 4130 or Steel Comp 4037 Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-144-3646, 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 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 8 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
NSN5306-00-144-3646
Primary Part NumberAN3-4
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerAeronautical Standards Group Dept of Navy and Air Force
StatusCANCELLED
Fastener Length0.531 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Thread Length0.406 INCHES MINIMUM IN
Nominal Thread Diameter0.190 INCHES IN
Hardness Rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
Grip Length0.125 INCHES NOMINAL IN
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
Head StyleHEXAGON
Thread Quantity Per Inch32
Distance From Head Largest Bearing Surface to Shank Hole Center0.391 INCHES NOMINAL FIRST HOLE IN
Head Height0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
Material Document and ClassificationMIL-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
Shank Unthreaded Hole Diameter0.070 INCHES MINIMUM FIRST HOLE IN
Surface TreatmentCADMIUM AND CHROMATE OVERALL
MaterialSTEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL
Features ProvidedFINISHED HEAD
Thread Series DesignatorUNF
Thread Class3A A
Minimum Tensile Strength125000 POUNDS PER SQUARE INCH LBS
Width Between Flats0.365 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5306-00-063-3268
HAZMATNo
Verified Substitutes 12
No Item Name Available
Bolt,machine
Bolt,close Tolerance
Bolt,close Tolerance
5306-00-150-9233AN5-40A SUCCESSOR
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Bolt,machine
Bolt,machine
Bolt,machine
Bolt,clevis
Bolt,machine
Cross-Reference Index
Part NumberManufacturer
AN3-4 Aeronautical Standards Group Dept of Navy and Air Force (USA)
MILB6812 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILB6812 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
2018124 Embraer S.a. (BRA)
6026-7236-3 Raytheon Technical Services Company (USA)
5306PL0809898 Jednolity Indeks Materialowy - Uniform Material Index (POL)
2018124 Embraer Empresa Brasileira De Aeronautica Sa (BRA)
6026-3000-1 Raytheon Technical Services Company (USA)
2018124 Embraer Aviation International (FRA)
Related Parts
SUCCESSOR 5306-00-063-3268 Bolt,machine
5306-00-174-4191SUCCESSOR
NO ITEM NAME AVAILABLE
5306-00-144-4058SUCCESSOR
BOLT,CLOSE TOLERANCE
5306-00-150-9097SUCCESSOR
BOLT,CLOSE TOLERANCE
5306-00-150-9233SUCCESSOR
BOLT,MACHINE
AN5-40A
5306-00-150-9866SUCCESSOR
BOLT,MACHINE
5306-00-150-9867SUCCESSOR
BOLT,MACHINE
5306-00-150-9868SUCCESSOR
BOLT,MACHINE
5306-00-151-0656SUCCESSOR
BOLT,CLEVIS
5306-00-151-0709SUCCESSOR
BOLT,MACHINE
5306-00-151-1084SUCCESSOR
BOLT,MACHINE
5306-00-151-2513SUCCESSOR
BOLT,MACHINE

Frequently Asked Questions

What is NSN 5306-00-144-3646?

NSN 5306-00-144-3646 is a Bolt,machine, 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 5306-00-144-3646?

NSN 5306-00-144-3646 has 9 cross-referenced part numbers: AN3-4 (Aeronautical Standards Group Dept of Navy and Air Force), MILB6812 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILB6812 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), 2018124 (Embraer S.a.), 6026-7236-3 (Raytheon Technical Services Company) and 4 more.

What NSN replaces 5306-00-144-3646?

There are 12 known substitutes for 5306-00-144-3646: 5306-00-174-4191, 5306-00-063-3268, 5306-00-144-4058 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AN3-4?

Key specifications for AN3-4: Fastener Length: 0.531 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND; Thread Length: 0.406 INCHES MINIMUM IN; Nominal Thread Diameter: 0.190 INCHES IN. 20 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-144-3646 still in active supply?

NSN 5306-00-144-3646 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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