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X21-11 — STUD,PLAIN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

X21-11: STUD,PLAIN.

The STUD,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1137, thread_class: 5A STUD THREAD A, thread_length: 0.625 INCHES MINIMUM NUT THREAD IN, overall_length: 2.062 INCHES NOMINAL IN, thread_direction: RIGHT-HAND STUD THREAD, nominal_thread_size: 0.375 INCHES STUD THREAD IN. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-423-7998, 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
X21-11
NSN: 5307-00-423-7998
FSC: 5307 — Studs
CAGE: 36479 — LIPE CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 1137
thread_class5A STUD THREAD A
thread_length0.625 INCHES MINIMUM NUT THREAD IN
overall_length2.062 INCHES NOMINAL IN
thread_directionRIGHT-HAND STUD THREAD
nominal_thread_size0.375 INCHES STUD THREAD IN
cotter_pin_hole_diameter0.120 INCHES NOMINAL FIRST HOLE IN
thread_quantity_per_inch16 STUD THREAD
thread_series_designatorUNF NUT THREAD
distance_from_cotter_pin_hole_centerline_to_nut_end0.125 INCHES NOMINAL FIRST HOLE IN
NSN5307-00-423-7998
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: X21-11 · 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
•
COTTER PIN HOLE DIAMETER: 0.120 INCHES NOMINAL FIRST HOLE IN
•
THREAD LENGTH: 0.438 INCHES MINIMUM STUD THREAD IN
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.375 INCHES STUD THREAD IN
TECHNICAL CHARACTERISTICS
COTTER PIN HOLE DIAMETER0.120 INCHES NOMINAL FIRST HOLE IN
THREAD LENGTH0.438 INCHES MINIMUM STUD THREAD IN
THREAD LENGTH0.625 INCHES MINIMUM NUT THREAD IN
OVERALL LENGTH2.062 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.375 INCHES STUD THREAD IN
NOMINAL THREAD SIZE0.375 INCHES NUT THREAD IN
THREAD CLASS2A NUT THREAD A
THREAD CLASS5A STUD THREAD A
SUBSTITUTES & CROSS-REFERENCES 1
233571Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is X21-11?
X21-11 is a STUD,PLAIN.
What parts can replace X21-11?
There is 1 known substitute for X21-11: 233571. Substitute compatibility should be verified for your specific system.
What is the NSN for X21-11?
X21-11 is cataloged in the U.S. Government catalog under NSN 5307-00-423-7998. 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.