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Technical Data Sheet
PartsTable / COMPONENT / 1D4538
1D4538 ✓ 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 OVERALL, head_style: HEXAGON, head_height: 0.234 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.875 INCHES MAXIMUM IN, fastener_length: 2.250 INCHES NOMINAL 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 5306-00-226-4834, 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
1D4538
NSN: 5306-00-226-4834
FSC: 5306
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.234 INCHES NOMINAL IN
thread_class2A A
thread_length0.875 INCHES MAXIMUM IN
fastener_length2.250 INCHES NOMINAL IN
hardness_rating30.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats0.500 INCHES NOMINAL IN
minimum_yield_strength145000 POUNDS PER SQUARE INCH LBS
nominal_thread_diameter0.312 INCHES IN
NSN5306-00-226-4834
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1D4538 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
1363HX1Upgraded Successor
successor cross-reference
successor
MS90727-38Upgraded Successor
successor cross-reference
successor
ASME B18.2.1Upgraded Successor
successor cross-reference
successor
13207E5500FN87Upgraded Successor
successor cross-reference
successor
MS90725-41Upgraded Successor
successor cross-reference
successor
AEB02F312E00AW9A91Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1D4538?
1D4538 is a BOLT,MACHINE.
What parts can replace 1D4538?
There are 27 known substitutes for 1D4538: 1363HX1, MS90727-38, ASME B18.2.1 and 24 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1D4538?
1D4538 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-226-4834. 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