PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MILB857,3/4-10UNC-2AX4-1/2LG
MILB857,3/4-10UNC-2AX4-1/2LG ✓ 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 MILB857,3/4-10UNC-2AX4-1/2LG is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-201-8867, 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
MILB857,3/4-10UNC-2AX4-1/2LG
NSN: 5305-01-201-8867
FSC: 5305
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part NumberMILB857,3/4-10UNC-2AX4-1/2LG
NSN5305-01-201-8867
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MILB857,3/4-10UNC-2AX4-1/2LG · 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
•
HEAD HEIGHT: 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
MATERIAL: NICKEL ALLOY OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
THREAD CLASS: 2A A
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
HEAD HEIGHT0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
DEPARTURE FROM CITED DOCUMENTMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
MATERIALNICKEL ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
CRITICALITY CODE JUSTIFICATIONZZZW
THREAD CLASS2A A
HEAD STYLEHEXAGON
NOMINAL THREAD DIAMETER0.750 INCHES IN
FASTENER LENGTH4.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
000.750-10UNC-2AX4.500Interchangeable
interchangeable cross-reference
interchangeable
688-1864 APPX 2Interchangeable
interchangeable cross-reference
interchangeable
MIL-S-1222Interchangeable
interchangeable cross-reference
interchangeable
MIL-S-1222G 3/4IN 10UNCX4-1/2LInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222Interchangeable
interchangeable cross-reference
interchangeable
MIL-B-857 TY 3(MOD)Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy MILB857,3/4-10UNC-2AX4-1/2LG?
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 MILB857,3/4-10UNC-2AX4-1/2LG?
MILB857,3/4-10UNC-2AX4-1/2LG is a MILB857,3/4-10UNC-2AX4-1/2LG.
What parts can replace MILB857,3/4-10UNC-2AX4-1/2LG?
There are 11 known substitutes for MILB857,3/4-10UNC-2AX4-1/2LG: 000.750-10UNC-2AX4.500, 688-1864 APPX 2, MIL-S-1222 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILB857,3/4-10UNC-2AX4-1/2LG?
MILB857,3/4-10UNC-2AX4-1/2LG is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-201-8867. 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 — MILB857,3/4-10UNC-2AX4-1/2LG

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