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Technical Data Sheet
PartsTable / COMPONENT / 4HR831
4HR831 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8630 OVERALL, head_style: HEXAGON, grip_length: 0.312 INCHES NOMINAL IN, head_height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.657 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-550-9129, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
4HR831
NSN: 5306-00-550-9129
FSC: 5306
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 8630 OVERALL
head_styleHEXAGON
grip_length0.312 INCHES NOMINAL IN
head_height0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
thread_class2A A
thread_length0.657 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN
fastener_length0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentDICHROMATE ZINC OVERALL
width_between_flats0.428 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
NSN5306-00-550-9129
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4HR831 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH BETWEEN FLATS: 0.428 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
FASTENER LENGTH: 0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD LENGTH: 0.657 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS0.428 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES IN
FASTENER LENGTH0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.657 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
THREAD CLASS2A A
HEAD HEIGHT0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
WE 2146Interchangeable
interchangeable cross-reference
interchangeable
367Interchangeable
interchangeable cross-reference
interchangeable
72056Interchangeable
interchangeable cross-reference
interchangeable
1914869Interchangeable
Same NIIN cross-reference
interchangeable
D32484Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4HR831?
4HR831 is a BOLT,MACHINE.
What parts can replace 4HR831?
There are 5 known substitutes for 4HR831: WE 2146, 367, 72056 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4HR831?
4HR831 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-550-9129. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026