PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4191ABolt,machine

Brinkley Technology Group Llc Dba Hercules Manufacturing · NSN 5306-00-225-8504 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-225-8504 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-225-8504. Primary manufacturer part number: 4191A.
Features
  • Bolt,machine — FSC 5306
  • Head Style: HEXAGON
  • Features Provided: FINISHED HEAD
  • Nominal Thread Diameter: 0.312 INCHES IN
  • Thread Class: 2A A
  • Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Grip Length: 0.938 INCHES MINIMUM AND 1.063 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-225-8504, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 14 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
NSN5306-00-225-8504
Primary Part Number4191A
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerBrinkley Technology Group Llc Dba Hercules Manufacturing
StatusCANCELLED
Head StyleHEXAGON
Features ProvidedFINISHED HEAD
Nominal Thread Diameter0.312 INCHES IN
Thread Class2A A
Hardness Rating25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Grip Length0.938 INCHES MINIMUM AND 1.063 INCHES MAXIMUM IN
MaterialSTEEL OVERALL
Surface Treatment Document and ClassificationQQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Fastener Length1.938 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
Thread Quantity Per Inch18
Thread DirectionRIGHT-HAND
Material Document and ClassificationSAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Thread Length0.875 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN
Width Between Flats0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Nondefinitive Spec/std Data2 TYPE AND 10P STYLE AND 5 GRADE
Surface Finish63.0 MICROINCHES THREADS
Head Height0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
Minimum Tensile Strength120000 POUNDS PER SQUARE INCH LBS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5306-00-225-8516MS90725-52 SUCCESSOR
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-225-9095MS90726-40 SUCCESSOR
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-226-4824AEB02C312625WA6AA1 SUCCESSOR
Bolt,machine
The American Society of Mechanical Engineers
5306-00-226-4838AEB02C312C25AW9A91 SUCCESSOR
Bolt,machine
The American Society of Mechanical Engineers
5306-00-226-4840B1821BH031C375N SUCCESSOR
Bolt,machine
American National Standards Institute Incorporated Dba American National Standards Institute
Bolt,machine
5306-00-469-0516000-14671PC60 SUCCESSOR
Bolt,machine
Sparling Instruments, Incorporated
5306-00-050-1237AEB02F312625AW9A91 SUCCESSOR
Bolt,machine
The American Society of Mechanical Engineers
5306-00-051-4086B1821BH031F300N SUCCESSOR
Bolt,machine
American National Standards Institute Incorporated Dba American National Standards Institute
5306-00-051-4087AEB02F312C25AW9A91 SUCCESSOR
Bolt,machine
The American Society of Mechanical Engineers
Cross-Reference Index
Part NumberManufacturer
4191A PRIMARY Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
0251398 Daf Trucks N.v. (NLD)
179826 Zf Industrieantriebe Witten Gmbh (DEU)
35A2D64 PRIMARY Clark Equipment Co Div Doosan Infracore Portable Power (USA)
MS90725-40 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MS90725-40 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
FFS85 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
800-1033 Cummins Power Generation Inc. (USA)
70009-40 Little Giant Crane and Shovel Inc (USA)
4191A Hercules Engine Co Inc (USA)
179826 General Motors Corp (USA)
11228 PRIMARY Schwitzer Engine Components a Household Intl Co (USA)
95105300 Clark Equipment Co Div Doosan Infracore Portable Power (USA)
69126 Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA)
179826 General Motors Llc Dba General Motors Llc (USA)
Related Parts
5306-00-225-8516SUCCESSOR
BOLT,MACHINE
MS90725-52
5306-00-225-9095SUCCESSOR
BOLT,MACHINE
MS90726-40
5306-00-226-4824SUCCESSOR
BOLT,MACHINE
AEB02C312625WA6AA1
5306-00-226-4838SUCCESSOR
BOLT,MACHINE
AEB02C312C25AW9A91
5306-00-226-4840SUCCESSOR
BOLT,MACHINE
B1821BH031C375N
5306-00-270-8275SUCCESSOR
BOLT,MACHINE
5306-00-469-0516SUCCESSOR
BOLT,MACHINE
000-14671PC60
5306-00-050-1237SUCCESSOR
BOLT,MACHINE
AEB02F312625AW9A91
5306-00-051-4086SUCCESSOR
BOLT,MACHINE
B1821BH031F300N
5306-00-051-4087SUCCESSOR
BOLT,MACHINE
AEB02F312C25AW9A91
5306-00-051-4091SUCCESSOR
BOLT,MACHINE
B1821BH031F425N
5306-00-051-4092SUCCESSOR
BOLT,MACHINE
B1821BH031F450N

Frequently Asked Questions

What is NSN 5306-00-225-8504?

NSN 5306-00-225-8504 is a Bolt,machine, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 5306 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5306-00-225-8504?

NSN 5306-00-225-8504 has 15 cross-referenced part numbers: 4191A (Brinkley Technology Group Llc Dba Hercules Manufacturing), 0251398 (Daf Trucks N.v.), 179826 (Zf Industrieantriebe Witten Gmbh), 35A2D64 (Clark Equipment Co Div Doosan Infracore Portable Power), MS90725-40 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M) and 10 more.

What NSN replaces 5306-00-225-8504?

There are 12 known substitutes for 5306-00-225-8504: 5306-00-225-8516, 5306-00-225-9095, 5306-00-226-4824 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4191A?

Key specifications for 4191A: Head Style: HEXAGON; Features Provided: FINISHED HEAD; Nominal Thread Diameter: 0.312 INCHES IN; Thread Class: 2A A. 20 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-225-8504 still in active supply?

NSN 5306-00-225-8504 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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