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520A424 — STUD,PLAIN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

520A424: STUD,PLAIN.

The STUD,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 3135 OR STEEL COMP 4140, thread_class: 2A STUD THREAD A, thread_length: 0.562 INCHES MINIMUM NUT THREAD IN, overall_length: 2.312 INCHES NOMINAL IN, hardness_rating: 36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM, thread_direction: RIGHT-HAND NUT THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-358-3634, 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
520A424
NSN: 5307-00-358-3634
FSC: 5307 — Studs
CAGE: 44940 — CUMMINS POWER GENERATION INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 3135 OR STEEL COMP 4140
thread_class2A STUD THREAD A
thread_length0.562 INCHES MINIMUM NUT THREAD IN
overall_length2.312 INCHES NOMINAL IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND NUT THREAD
nominal_thread_size0.312 INCHES NUT THREAD IN
thread_quantity_per_inch18 STUD THREAD
thread_series_designatorUNF NUT THREAD
NSN5307-00-358-3634
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 520A424 · 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 LENGTH: 0.562 INCHES MINIMUM NUT THREAD IN
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.312 INCHES NUT THREAD IN
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.562 INCHES MINIMUM NUT THREAD IN
THREAD LENGTH0.938 INCHES MINIMUM STUD THREAD IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM
OVERALL LENGTH2.312 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.312 INCHES NUT THREAD IN
NOMINAL THREAD SIZE0.312 INCHES STUD THREAD IN
THREAD CLASS2A STUD THREAD A
THREAD CLASS2A NUT THREAD A
SUBSTITUTES & CROSS-REFERENCES 1
8409683Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 520A424?
520A424 is a STUD,PLAIN.
What parts can replace 520A424?
There is 1 known substitute for 520A424: 8409683. Substitute compatibility should be verified for your specific system.
What is the NSN for 520A424?
520A424 is cataloged in the U.S. Government catalog under NSN 5307-00-358-3634. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.