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AN128437 — STUD,PLAIN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

AN128437: STUD,PLAIN.

The STUD,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740, thread_class: 3A NUT THREAD A, thread_length: 0.562 INCHES MINIMUM NUT THREAD IN, overall_length: 1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES NUT THD, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-206-7417, 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
AN128437
NSN: 5307-00-206-7417
FSC: 5307 — Studs
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL COMP 8740
thread_class3A NUT THREAD A
thread_length0.562 INCHES MINIMUM NUT THREAD IN
overall_length1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES NUT THD
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND STUD THREAD
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.250 INCHES NUT THREAD IN
thread_pitch_diameters+0.2248 TO 0.2263 INCHES STUD THREAD IN
cotter_pin_hole_diameter0.065 INCHES MINIMUM AND 0.072 INCHES MAXIMUM FIRST HOLE IN
thread_quantity_per_inch20 STUD THREAD
NSN5307-00-206-7417
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AN128437 · 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
•
SURFACE FINISH: 32.0 MICROINCHES NUT THD
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
COTTER PIN HOLE DIAMETER: 0.065 INCHES MINIMUM AND 0.072 INCHES MAXIMUM FIRST HOLE IN
•
THREAD LENGTH: 0.562 INCHES MINIMUM NUT THREAD IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES NUT THD
SURFACE FINISH63.0 MICROINCHES SHANK
SURFACE FINISH32.0 MICROINCHES STUD THD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
COTTER PIN HOLE DIAMETER0.065 INCHES MINIMUM AND 0.072 INCHES MAXIMUM FIRST HOLE IN
THREAD LENGTH0.562 INCHES MINIMUM NUT THREAD IN
THREAD LENGTH0.688 INCHES MINIMUM STUD THREAD IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
THREAD PITCH DIAMETERS+0.2248 TO 0.2263 INCHES STUD THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE
SUBSTITUTES & CROSS-REFERENCES 1
AS128363 THRU AS128686Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AN128437?
AN128437 is a STUD,PLAIN.
What parts can replace AN128437?
There is 1 known substitute for AN128437: AS128363 THRU AS128686. Substitute compatibility should be verified for your specific system.
What is the NSN for AN128437?
AN128437 is cataloged in the U.S. Government catalog under NSN 5307-00-206-7417. 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.