PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILB857TYPE2GRADE2Bolt,machine

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5306-00-174-9463 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-174-9463 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-174-9463. Primary manufacturer part number: MILB857TYPE2GRADE2.
Features
  • Bolt,machine — FSC 5306
  • Head Style: HEXAGON
  • Fastener Length: 1.750 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 13
  • Thread Class: 2A A
  • Minimum Tensile Strength: 75000 POUNDS PER SQUARE INCH LBS
  • Hardness Rating: 100.0 ROCKWELL B NOMINAL OVERALL
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
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 5306-00-174-9463, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 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
NSN5306-00-174-9463
Primary Part NumberMILB857TYPE2GRADE2
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Head StyleHEXAGON
Fastener Length1.750 INCHES NOMINAL IN
Thread Quantity Per Inch13
Thread Class2A A
Minimum Tensile Strength75000 POUNDS PER SQUARE INCH LBS
Hardness Rating100.0 ROCKWELL B NOMINAL OVERALL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Width Between Flats0.725 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
MaterialSTEEL OVERALL
Thread Length1.250 INCHES MINIMUM IN
Surface TreatmentCHROMATE ZINC OVERALL
Head Height0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
Features ProvidedFINISHED HEAD
Thread DirectionRIGHT-HAND
Nominal Thread Diameter0.500 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5306-00-270-9422
HAZMATNo
Verified Substitutes 12
No Item Name Available
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
Bolt,machine
Bolt,machine
5306-00-275-9800280450PC252 SUCCESSOR
Bolt,machine
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5306-00-281-51641D4703 SUCCESSOR
Bolt,machine
Caterpillar Inc Div Caterpillar Defense
Bolt,machine
Bolt,machine
Bolt,machine
Cross-Reference Index
Part NumberManufacturer
MILB857TYPE2GRADE2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
SL-8504 PIECE 28 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
MIL-DTL-1222 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-S-1222 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
SUCCESSOR 5306-00-270-9422 Bolt,machine
5306-00-270-9592SUCCESSOR
NO ITEM NAME AVAILABLE
5306-00-227-0582SUCCESSOR
BOLT,MACHINE
0.75010UNC2A1.750T1G5BAC
5306-00-227-0601SUCCESSOR
BOLT,MACHINE
306-40172
5306-00-272-5104SUCCESSOR
BOLT,MACHINE
5306-00-275-9800SUCCESSOR
BOLT,MACHINE
280450PC252
5306-00-281-5164SUCCESSOR
BOLT,MACHINE
1D4703
5306-00-299-2342SUCCESSOR
BOLT,MACHINE
5306-00-299-2343SUCCESSOR
BOLT,MACHINE
5306-00-299-2368SUCCESSOR
BOLT,MACHINE
5306-00-299-2369SUCCESSOR
BOLT,MACHINE
5306-00-299-2378SUCCESSOR
BOLT,MACHINE

Frequently Asked Questions

What is NSN 5306-00-174-9463?

NSN 5306-00-174-9463 is a Bolt,machine, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5306 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5306-00-174-9463?

NSN 5306-00-174-9463 has 4 cross-referenced part numbers: MILB857TYPE2GRADE2 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), SL-8504 PIECE 28 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), MIL-DTL-1222 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-S-1222 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5306-00-174-9463?

There are 12 known substitutes for 5306-00-174-9463: 5306-00-270-9592, 5306-00-227-0582, 5306-00-227-0601 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILB857TYPE2GRADE2?

Key specifications for MILB857TYPE2GRADE2: Head Style: HEXAGON; Fastener Length: 1.750 INCHES NOMINAL IN; Thread Quantity Per Inch: 13; Thread Class: 2A A. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-174-9463 still in active supply?

NSN 5306-00-174-9463 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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