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Technical Data Sheet
PartsTable / COMPONENT / 56631F
56631F ✓ 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,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 3A STUD THREAD A, thread_length: 0.750 INCHES MINIMUM NUT THREAD IN, overall_length: 2.000 INCHES NOMINAL IN, thread_direction: RIGHT-HAND NUT THREAD, nominal_thread_size: 0.500 INCHES NUT THREAD IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-206-2523, 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
56631F
NSN: 5307-00-206-2523
FSC: 5307
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL
thread_class3A STUD THREAD A
thread_length0.750 INCHES MINIMUM NUT THREAD IN
overall_length2.000 INCHES NOMINAL IN
thread_directionRIGHT-HAND NUT THREAD
nominal_thread_size0.500 INCHES NUT THREAD IN
thread_quantity_per_inch13 STUD THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) STUD THREAD
NSN5307-00-206-2523
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 56631F · 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 CLASS: 3A STUD THREAD A
•
THREAD QUANTITY PER INCH: 20 NUT THREAD
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) STUD THREAD
•
NOMINAL THREAD SIZE: 0.500 INCHES STUD THREAD IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3A STUD THREAD A
THREAD QUANTITY PER INCH20 NUT THREAD
OVERALL LENGTH2.000 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) STUD THREAD
THREAD CLASS3A NUT THREAD A
NOMINAL THREAD SIZE0.500 INCHES STUD THREAD IN
NOMINAL THREAD SIZE0.500 INCHES NUT THREAD IN
THREAD SERIES DESIGNATORUNF NUT THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
THREAD QUANTITY PER INCH13 STUD THREAD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
MS38338-135Interchangeable
interchangeable cross-reference
interchangeable
68700Interchangeable
interchangeable cross-reference
interchangeable
FS1072Interchangeable
interchangeable cross-reference
interchangeable
245072Interchangeable
interchangeable cross-reference
interchangeable
1HUC5Interchangeable
interchangeable cross-reference
interchangeable
4X397Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 56631F?
56631F is a STUD,PLAIN.
What parts can replace 56631F?
There are 9 known substitutes for 56631F: MS38338-135, 68700, FS1072 and 6 more. Substitute compatibility should be verified for your specific system.
Is 56631F still available?
56631F is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026