PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

255-161Bolt,machine

Hamilton Sundstrand Corporation · NSN 5306-00-145-7079 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-145-7079 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-145-7079. Primary manufacturer part number: 255-161.
Features
  • Bolt,machine — FSC 5306
  • Width Between Flats: 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
  • Thread Direction: RIGHT-HAND
  • Thread Length: 0.499 INCHES MINIMUM IN
  • Grip Length: 1.250 INCHES NOMINAL IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Minimum Tensile Strength: 125000 POUNDS PER SQUARE INCH LBS
  • Hole Type: DRILLED
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 8740 or Steel Comp 8630 or Steel Comp 8735 or Steel Comp 4037 or Steel Comp 4140 or Steel Comp 4130 Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-145-7079, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Hamilton Sundstrand Corporation. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 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
NSN5306-00-145-7079
Primary Part Number255-161
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerHamilton Sundstrand Corporation
StatusCANCELLED
Width Between Flats0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Thread Length0.499 INCHES MINIMUM IN
Grip Length1.250 INCHES NOMINAL IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Minimum Tensile Strength125000 POUNDS PER SQUARE INCH LBS
Hole TypeDRILLED
Features ProvidedFINISHED HEAD
Hole Quantity6
MaterialSTEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4037 OR STEEL COMP 4140 OR STEEL COMP 4130 OVERALL
Thread Class3A A
Hardness Rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
Hole Configuration StyleHEXAGON LONGITUDINAL HOLE
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Fastener Length1.781 INCHES NOMINAL IN
Material Document and ClassificationMIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR AMS 6300 ASSN STD 4TH MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 5TH MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 6TH MATERIAL RESPONSE OVERALL
Head Height0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
Nominal Thread Diameter0.190 INCHES IN
Hole Diameter0.070 INCHES NOMINAL IN
Thread Quantity Per Inch24
Head StyleDISHED HEXAGON
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
No Item Name Available
5120-00-520-3904255161 INTERCHANGEABLE
Wrench,open End
Valcor Engineering Corporation
2590-01-054-5203255161 INTERCHANGEABLE
Filler Neck,vehicular Components
Brinkley Technology Group Llc Dba Hercules Manufacturing
4730-01-324-270625516-1 INTERCHANGEABLE
Cap,quick Disconnect
United States Department of the Navy Dba Naval Surface Warfare Center Panama City
Cross-Reference Index
Part NumberManufacturer
255-161 Hamilton Sundstrand Corporation (USA)
MS20074-03-16 Lockheed Martin Corporation (USA)
MS20074-03-16 Lockheed Martin Corporation Div Rotary and Mission Systems (USA)
MS20074-03-16 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
3X164601 Eaton Aerospace, Llc Dba Jackson South (USA)
Related Parts
5306-00-022-1763SUCCESSOR
NO ITEM NAME AVAILABLE
5120-00-520-3904INTERCHANGEABLE
WRENCH,OPEN END
255161
2590-01-054-5203INTERCHANGEABLE
FILLER NECK,VEHICULAR COMPONENTS
255161
4730-01-324-2706INTERCHANGEABLE
CAP,QUICK DISCONNECT
25516-1

Frequently Asked Questions

What is NSN 5306-00-145-7079?

NSN 5306-00-145-7079 is a Bolt,machine, manufactured by Hamilton Sundstrand Corporation, classified under FSC 5306 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5306-00-145-7079?

NSN 5306-00-145-7079 has 5 cross-referenced part numbers: 255-161 (Hamilton Sundstrand Corporation), MS20074-03-16 (Lockheed Martin Corporation), MS20074-03-16 (Lockheed Martin Corporation Div Rotary and Mission Systems), MS20074-03-16 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 3X164601 (Eaton Aerospace, Llc Dba Jackson South).

What NSN replaces 5306-00-145-7079?

There are 4 known substitutes for 5306-00-145-7079: 5306-00-022-1763, 5120-00-520-3904, 2590-01-054-5203 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 255-161?

Key specifications for 255-161: Width Between Flats: 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN; Thread Direction: RIGHT-HAND; Thread Length: 0.499 INCHES MINIMUM IN; Grip Length: 1.250 INCHES NOMINAL IN. 22 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-145-7079 still in active supply?

NSN 5306-00-145-7079 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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