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Technical Data Sheet
PartsTable / COMPONENT / SMB148612
SMB148612 ✓ 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 STUD,SHOULDERED AND STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303, thread_class: 2A NUT THREAD A, thread_length: 0.188 INCHES MINIMUM NUT THREAD IN, overall_length: 0.625 INCHES NOMINAL IN, hardness_rating: 85.0 ROCKWELL C NOMINAL, shoulder_length: 0.062 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 5307-00-639-3317, 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
SMB148612
NSN: 5307-00-639-3317
FSC: 5307
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL COMP 303
thread_class2A NUT THREAD A
thread_length0.188 INCHES MINIMUM NUT THREAD IN
overall_length0.625 INCHES NOMINAL IN
hardness_rating85.0 ROCKWELL C NOMINAL
shoulder_length0.062 INCHES NOMINAL IN
style_designatorSHOULDERED AND STEPPED
thread_directionRIGHT-HAND STUD THREAD
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.164 INCHES STUD THREAD IN
nut_end_shank_length0.125 INCHES NOMINAL IN
distance_across_flats0.312 INCHES NOMINAL IN
NSN5307-00-639-3317
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SMB148612 · 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
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.164 INCHES STUD THREAD IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) STUD THREAD
•
THREAD CLASS: 2A NUT THREAD A
•
DISTANCE ACROSS FLATS: 0.312 INCHES NOMINAL IN
•
THREAD LENGTH: 0.188 INCHES MINIMUM NUT THREAD IN
•
MATERIAL: STEEL COMP 303
•
HARDNESS RATING: 85.0 ROCKWELL C NOMINAL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND STUD THREAD
NOMINAL THREAD SIZE0.164 INCHES STUD THREAD IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) STUD THREAD
THREAD CLASS2A NUT THREAD A
DISTANCE ACROSS FLATS0.312 INCHES NOMINAL IN
THREAD LENGTH0.188 INCHES MINIMUM NUT THREAD IN
MATERIALSTEEL COMP 303
HARDNESS RATING85.0 ROCKWELL C NOMINAL
NOMINAL THREAD SIZE0.138 INCHES NUT THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATIONAISI303 ASSN STD SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
5311-1Interchangeable
interchangeable cross-reference
interchangeable
C12058Interchangeable
interchangeable cross-reference
interchangeable
GGG-D-751 TYEInterchangeable
interchangeable cross-reference
interchangeable
717-021612Interchangeable
interchangeable cross-reference
interchangeable
CC112Interchangeable
interchangeable cross-reference
interchangeable
624 1INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB148612?
SMB148612 is a STUD,SHOULDERED AND STEPPED.
What parts can replace SMB148612?
There are 8 known substitutes for SMB148612: 5311-1, C12058, GGG-D-751 TYE and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SMB148612?
SMB148612 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-639-3317. 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