PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MILB45912
MILB45912 ✓ 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: 0.500 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 2.000 INCHES NOMINAL IN, fastener_length: 2.500 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 5306-00-021-4259, 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
MILB45912
NSN: 5306-00-021-4259
FSC: 5306
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.500 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
thread_class2A A
thread_length2.000 INCHES NOMINAL IN
fastener_length2.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_between_flats1.106 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
nominal_thread_diameter0.875 INCHES IN
thread_quantity_per_inch14
thread_series_designatorUNF
NSN5306-00-021-4259
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MILB45912 · 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
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OR ZINC OVERALL
•
SPECIFICATION/STANDARD DATA: 81349-MIL-B-45912 GOVERNMENT SPECIFICATION AND 96906-MS35764 REV D/INACTIVE/ GOVERNMENT STANDARD
•
THREAD DIRECTION: RIGHT-HAND
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY OPTIONAL ZINC COATED SURF. TREAT.
•
THREAD SERIES DESIGNATOR: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A449,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR SAE J429,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR GM 300-M MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
LOCKING FEATURE: DISTORTIONS BEARING SURFACE OF HEAD
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OR ZINC OVERALL
SPECIFICATION/STANDARD DATA81349-MIL-B-45912 GOVERNMENT SPECIFICATION AND 96906-MS35764 REV D/INACTIVE/ GOVERNMENT STANDARD
THREAD DIRECTIONRIGHT-HAND
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY OPTIONAL ZINC COATED SURF. TREAT.
THREAD SERIES DESIGNATORUNF
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A449,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR SAE J429,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR GM 300-M MFR REF SINGLE MATERIAL RESPONSE OVERALL
LOCKING FEATUREDISTORTIONS BEARING SURFACE OF HEAD
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER0.750 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
MS35764-1017Upgraded Successor
successor cross-reference
successor
MILB45912Upgraded Successor
successor cross-reference
successor
MS35763-1017Upgraded Successor
successor cross-reference
successor
MS35764-1048Upgraded Successor
successor cross-reference
successor
5306008165991Upgraded Successor
successor cross-reference
successor
MS35763-1048Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy MILB45912?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MILB45912?
MILB45912 is a BOLT,MACHINE.
What parts can replace MILB45912?
There are 19 known substitutes for MILB45912: MS35764-1017, MILB45912, MS35763-1017 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILB45912?
MILB45912 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-021-4259. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MILB45912

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026