PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-S-1222Bolt,machine

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5306-00-299-2369 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-299-2369 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-299-2369. Primary manufacturer part number: MIL-S-1222.
Features
  • Bolt,machine — FSC 5306
  • Material Document and Classification: SAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Material: STEEL OVERALL
  • Features Provided: FINISHED HEAD
  • Thread Length: 1.000 INCHES MINIMUM IN
  • Width Between Flats: 0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
  • Minimum Tensile Strength: 69000 POUNDS PER SQUARE INCH LBS
  • Head Style: HEXAGON
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 5306-00-299-2369, 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 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 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
NSN5306-00-299-2369
Primary Part NumberMIL-S-1222
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
Material Document and ClassificationSAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL OVERALL
Features ProvidedFINISHED HEAD
Thread Length1.000 INCHES MINIMUM IN
Width Between Flats0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
Minimum Tensile Strength69000 POUNDS PER SQUARE INCH LBS
Head StyleHEXAGON
Head Height0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
Nominal Thread Diameter0.375 INCHES IN
Nondefinitive Spec/std Data2 TYPE AND 2 GRADE
Thread Class2A A
Thread DirectionRIGHT-HAND
Fastener Length1.750 INCHES NOMINAL IN
Surface TreatmentZINC OVERALL
Surface Treatment Document and ClassificationQQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Hardness Rating23.0 ROCKWELL C MAXIMUM OVERALL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Thread Quantity Per Inch16
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5306-00-010-2484 (102484)
HAZMATNo
Verified Substitutes 12
5306-00-010-2484102484 SUCCESSOR
Bolt,machine
General Motors Llc Dba General Motors Llc
Bolt,machine
5306-00-010-9177109177 SUCCESSOR
Bolt,machine
General Motors Llc Dba General Motors Llc
Bolt,machine
Bolt,machine
Bolt,machine
5306-00-019-0882190882 SUCCESSOR
Bolt,machine
General Motors Llc Dba General Motors Llc
Bolt,machine
Bolt,machine
5306-00-042-6921426921 SUCCESSOR
Bolt,machine
General Motors Llc Dba General Motors Llc
Cross-Reference Index
Part NumberManufacturer
MIL-S-1222 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
FFB575 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
M1222B2N6C228GCNZE Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
SL-8504 PIECE 3 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
Related Parts
SUCCESSOR 5306-00-010-2484 Bolt,machine · 102484
5306-00-010-2495SUCCESSOR
BOLT,MACHINE
5306-00-010-9177SUCCESSOR
BOLT,MACHINE
109177
5306-00-010-9191SUCCESSOR
BOLT,MACHINE
5306-00-013-1286SUCCESSOR
BOLT,MACHINE
5306-00-018-7532SUCCESSOR
BOLT,MACHINE
5306-00-019-0882SUCCESSOR
BOLT,MACHINE
190882
5306-00-021-7840SUCCESSOR
BOLT,MACHINE
5306-00-021-8057SUCCESSOR
BOLT,MACHINE
5306-00-042-6921SUCCESSOR
BOLT,MACHINE
426921
5306-00-042-6924SUCCESSOR
BOLT,MACHINE
5306-00-042-6926SUCCESSOR
BOLT,MACHINE

Frequently Asked Questions

What is NSN 5306-00-299-2369?

NSN 5306-00-299-2369 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 5306-00-299-2369?

NSN 5306-00-299-2369 has 4 cross-referenced part numbers: MIL-S-1222 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), FFB575 (Federal Specifications Promulgated by General Services Administration Washington DC), M1222B2N6C228GCNZE (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), SL-8504 PIECE 3 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging).

What NSN replaces 5306-00-299-2369?

There are 12 known substitutes for 5306-00-299-2369: 5306-00-010-2484, 5306-00-010-2495, 5306-00-010-9177 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-S-1222?

Key specifications for MIL-S-1222: Material Document and Classification: SAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Material: STEEL OVERALL; Features Provided: FINISHED HEAD; Thread Length: 1.000 INCHES MINIMUM IN. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-299-2369 still in active supply?

NSN 5306-00-299-2369 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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