PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

43B21912-136Bolt,machine

Naval Sea Systems Command · NSN 5306-00-227-0869 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-227-0869 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-227-0869. Primary manufacturer part number: 43B21912-136.
Features
  • Bolt,machine — FSC 5306
  • Fastener Length: 1.250 INCHES NOMINAL IN
  • Thread Length: 0.875 INCHES MINIMUM IN
  • Thread Quantity Per Inch: 18
  • Width Between Flats: 0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
  • Test Data Document: MIL-DTL-1222 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Material: STEEL COMP 410 OR STEEL COMP 416 OVERALL
  • Head Style: HEXAGON
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 410 or Steel Comp 416 Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-227-0869, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-00-227-0869
Primary Part Number43B21912-136
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
Fastener Length1.250 INCHES NOMINAL IN
Thread Length0.875 INCHES MINIMUM IN
Thread Quantity Per Inch18
Width Between Flats0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
Test Data DocumentMIL-DTL-1222 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
MaterialSTEEL COMP 410 OR STEEL COMP 416 OVERALL
Head StyleHEXAGON
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Nominal Thread Diameter0.312 INCHES IN
Thread Class2A A
Nondefinitive Spec/std Data2 TYPE
Surface TreatmentPASSIVATE OVERALL
Departure From Cited DesignatorAS MOD BY MATERIAL SPEC
Specification/standard Data81349 - MIL-DTL-1222 GOVERNMENT SPECIFICATION
Features ProvidedFINISHED HEAD
Material Document and ClassificationQQ-S-763 COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
Head Height0.203 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5306-00-227-05820.75010UNC2A1.750T1G5BAC SUCCESSOR
Bolt,machine
Nucor Fastener
5306-00-227-0601306-40172 SUCCESSOR
Bolt,machine
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division
5306-00-281-51641D4703 SUCCESSOR
Bolt,machine
Caterpillar Inc Div Caterpillar Defense
Bolt,machine
Bolt,machine
5306-00-426-34021D4608 SUCCESSOR
Bolt,machine
Caterpillar Inc Div Caterpillar Defense
5306-00-637-9674MS35307-336 SUCCESSOR
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-732-77146C-3210 SUCCESSOR
Bolt,machine
Caterpillar Inc Div Caterpillar Defense
Bolt,machine
Bolt,machine
Cross-Reference Index
Part NumberManufacturer
43B21912-136 PRIMARY Naval Sea Systems Command (USA)
MIL-DTL-1222 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5306-00-227-0582SUCCESSOR
BOLT,MACHINE
0.75010UNC2A1.750T1G5BAC
5306-00-227-0601SUCCESSOR
BOLT,MACHINE
306-40172
5306-00-281-5164SUCCESSOR
BOLT,MACHINE
1D4703
5306-00-299-2342SUCCESSOR
BOLT,MACHINE
5306-00-299-2378SUCCESSOR
BOLT,MACHINE
5306-00-426-3402SUCCESSOR
BOLT,MACHINE
1D4608
5306-00-637-9674SUCCESSOR
BOLT,MACHINE
MS35307-336
5306-00-732-7714SUCCESSOR
BOLT,MACHINE
6C-3210
5306-01-282-7489SUCCESSOR
BOLT,MACHINE
5306-01-323-5536SUCCESSOR
BOLT,MACHINE
5306-01-327-3526SUCCESSOR
BOLT,MACHINE

Frequently Asked Questions

What is NSN 5306-00-227-0869?

NSN 5306-00-227-0869 is a Bolt,machine, manufactured by Naval Sea Systems Command, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-00-227-0869?

NSN 5306-00-227-0869 has 2 cross-referenced part numbers: 43B21912-136 (Naval Sea Systems Command), MIL-DTL-1222 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5306-00-227-0869?

There are 11 known substitutes for 5306-00-227-0869: 5306-00-227-0582, 5306-00-227-0601, 5306-00-281-5164 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 43B21912-136?

Key specifications for 43B21912-136: Fastener Length: 1.250 INCHES NOMINAL IN; Thread Length: 0.875 INCHES MINIMUM IN; Thread Quantity Per Inch: 18; Width Between Flats: 0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN. 18 total characteristics are documented in the Federal Logistics Information System.

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