PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NASM3 THRU 20Bolt,machine

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5306-00-638-8397 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-638-8397 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-638-8397. Primary manufacturer part number: NASM3 THRU 20.
Features
  • Bolt,machine — FSC 5306
  • Grip Length: 1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN
  • Width Between Flats: 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
  • Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
  • Material Document and Classification: MIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL
  • Material: STEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4140 OVERALL
  • Nominal Thread Diameter: 0.500 INCHES IN
  • Features Provided: FINISHED HEAD
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 4037 or Steel Comp 4130 or Steel Comp 8630 or Steel Comp 8735 or Steel Comp 8740 or Steel Comp 4140 Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-638-8397, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5306-00-638-8397
Primary Part NumberNASM3 THRU 20
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusCANCELLED
Grip Length1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN
Width Between Flats0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
Material Document and ClassificationMIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL
MaterialSTEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4140 OVERALL
Nominal Thread Diameter0.500 INCHES IN
Features ProvidedFINISHED HEAD
Thread Class3A A
Thread Quantity Per Inch20
Fastener Length2.078 INCHES MINIMUM AND 2.125 INCHES MAXIMUM IN
Minimum Tensile Strength125000 POUNDS PER SQUARE INCH LBS
Thread DirectionRIGHT-HAND
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Head StyleHEXAGON
Head Height0.265 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN
Hardness Rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
Thread Length0.750 INCHES MINIMUM AND 0.829 INCHES MAXIMUM IN
Thread Series DesignatorUNF
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5306-00-584-7897AN7CH12A INTERCHANGEABLE
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-590-2700AN12-43A INTERCHANGEABLE
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5962-01-054-7064 INTERCHANGEABLE
Microcircuit,digital
5306-01-241-1510 INTERCHANGEABLE
Bolt,machine
Cross-Reference Index
Part NumberManufacturer
6253R300PC95 Control Flow, Inc. Dba Control Flow Inc (USA)
805136 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament (USA)
AN8-20A Aeronautical Standards Group Dept of Navy and Air Force (USA)
88-20A Department of the Air Force (USA)
6253R300PC95 Control Flow, Inc. Dba Westech Heavy Machinery Division Div Westech Heavy Machinery Division (USA)
NASM3 THRU 20 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
AN8-20A PRIMARY Mac Fasteners, Inc. Dba Mac Fasteners Inc (USA)
AN8-20A Dialogic Corp Dba Dialogic Fasteners (USA)
Related Parts
5306-00-584-7897INTERCHANGEABLE
BOLT,MACHINE
AN7CH12A
5306-00-590-2700INTERCHANGEABLE
BOLT,MACHINE
AN12-43A
5962-01-054-7064INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5306-01-241-1510INTERCHANGEABLE
BOLT,MACHINE

Frequently Asked Questions

What is NSN 5306-00-638-8397?

NSN 5306-00-638-8397 is a Bolt,machine, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5306 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5306-00-638-8397?

NSN 5306-00-638-8397 has 8 cross-referenced part numbers: 6253R300PC95 (Control Flow, Inc. Dba Control Flow Inc), 805136 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament), AN8-20A (Aeronautical Standards Group Dept of Navy and Air Force), 88-20A (Department of the Air Force), 6253R300PC95 (Control Flow, Inc. Dba Westech Heavy Machinery Division Div Westech Heavy Machinery Division) and 3 more.

What NSN replaces 5306-00-638-8397?

There are 4 known substitutes for 5306-00-638-8397: 5306-00-584-7897, 5306-00-590-2700, 5962-01-054-7064 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NASM3 THRU 20?

Key specifications for NASM3 THRU 20: Grip Length: 1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN; Width Between Flats: 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL; Material Document and Classification: MIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-638-8397 still in active supply?

NSN 5306-00-638-8397 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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