PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40031Bolt,internally Relieved Body

Hunt Valve Company, Inc. · NSN 5306-01-125-3572 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-01-125-3572 — this item is cataloged by the U.S. Government under National Stock Number 5306-01-125-3572. Primary manufacturer part number: 40031.
Features
  • Bolt,internally Relieved Body — FSC 5306
  • Head Style: HEXAGON
  • Material: COPPER ALLOY 655 OR COPPER ALLOY 675 OVERALL
  • Thread Class: 2A A
  • Fastener Length: 0.719 INCHES NOMINAL IN
  • Thread Series: ACME CONCENTRIC HOLE
  • Nominal Thread Diameter: 1.125 INCHES IN
  • Internal Thread Length: 0.875 INCHES NOMINAL CONCENTRIC HOLE IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy 655 or Copper Alloy 675 Overall construction
General Description

The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-125-3572, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-01-125-3572
Primary Part Number40031
Item NameBolt,internally Relieved Body
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerHunt Valve Company, Inc.
StatusACTIVE
Head StyleHEXAGON
MaterialCOPPER ALLOY 655 OR COPPER ALLOY 675 OVERALL
Thread Class2A A
Fastener Length0.719 INCHES NOMINAL IN
Thread SeriesACME CONCENTRIC HOLE
Nominal Thread Diameter1.125 INCHES IN
Internal Thread Length0.875 INCHES NOMINAL CONCENTRIC HOLE IN
Nominal Thread Size0.500 INCHES CONCENTRIC HOLE IN
Threads Per Inch10 CONCENTRIC HOLE
Thread Series DesignatorUNF
Thread Quantity Per Inch12
Head Height0.156 INCHES NOMINAL IN
Width Between Flats1.250 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Material Document and ClassificationASTM B98 ASSN STD 1ST MATERIAL RESPONSE OR ASTM B138 ASSN STD 2ND MATERIAL RESPONSE OVERALL
Style DesignatorCONCENTRIC HOLE THREADED
Thread Length0.552 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
Power Supply
6250-00-042-88026003-45 INTERCHANGEABLE
Shell,lamp
Raytheon Company Div Rmd Strategic
3110-00-114-9628 INTERCHANGEABLE
Bearing,ball,annular
3110-00-293-9166124735 INTERCHANGEABLE
Bearing,ball,annular
Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling
5930-00-518-4790S1630-62219 INTERCHANGEABLE
Switch,pressure
Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp
5935-00-727-7862UG61EU INTERCHANGEABLE
Connector,receptacle,electrical
Joint Electronics Type Designation System
5915-00-837-280310548812 INTERCHANGEABLE
Filter,radio Frequency Interfere
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
5970-01-093-2421 INTERCHANGEABLE
Insulator,plate
3040-01-181-572340031 INTERCHANGEABLE
Shaft,straight
Republic Machinery Co Inc Dba Republic Lagun Machine Tool Co
5315-01-215-018940031 INTERCHANGEABLE
Pin,straight,headless
Wilshire Corp
Cross-Reference Index
Part NumberManufacturer
B212-0-B PIECE 14 Hunt Valve Company, Inc. (USA)
40031 PRIMARY Hunt Valve Company, Inc. (USA)
Related Parts
6130-01-432-6300SUCCESSOR
POWER SUPPLY
6250-00-042-8802INTERCHANGEABLE
SHELL,LAMP
6003-45
3110-00-114-9628INTERCHANGEABLE
BEARING,BALL,ANNULAR
3110-00-293-9166INTERCHANGEABLE
BEARING,BALL,ANNULAR
124735
5930-00-518-4790INTERCHANGEABLE
SWITCH,PRESSURE
S1630-62219
5935-00-727-7862INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
UG61EU
5915-00-837-2803INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
10548812
5970-01-093-2421INTERCHANGEABLE
INSULATOR,PLATE
3040-01-181-5723INTERCHANGEABLE
SHAFT,STRAIGHT
40031
5315-01-215-0189INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
40031
3110-01-266-8450INTERCHANGEABLE
BEARING,BALL,ANNULAR
40031
5340-01-424-3380INTERCHANGEABLE
STOP,MECHANICAL
400-31

Frequently Asked Questions

What is NSN 5306-01-125-3572?

NSN 5306-01-125-3572 is a Bolt,internally Relieved Body, manufactured by Hunt Valve Company, Inc., classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-01-125-3572?

NSN 5306-01-125-3572 has 2 cross-referenced part numbers: B212-0-B PIECE 14 (Hunt Valve Company, Inc.), 40031 (Hunt Valve Company, Inc.).

What NSN replaces 5306-01-125-3572?

There are 12 known substitutes for 5306-01-125-3572: 6130-01-432-6300, 6250-00-042-8802, 3110-00-114-9628 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40031?

Key specifications for 40031: Head Style: HEXAGON; Material: COPPER ALLOY 655 OR COPPER ALLOY 675 OVERALL; Thread Class: 2A A; Fastener Length: 0.719 INCHES NOMINAL 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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