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A51271 — STUD,PLAIN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

A51271: STUD,PLAIN.

The STUD,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 2A NUT THREAD A, thread_length: 0.440 INCHES MINIMUM AND 0.500 INCHES MAXIMUM STUD THREAD IN, overall_length: 3.750 INCHES NOMINAL IN, thread_direction: RIGHT-HAND NUT THREAD, surface_treatment: PHOSPHATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-558-1820, 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
A51271
NSN: 5307-00-558-1820
FSC: 5307 — Studs
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialSTEEL
thread_class2A NUT THREAD A
thread_length0.440 INCHES MINIMUM AND 0.500 INCHES MAXIMUM STUD THREAD IN
overall_length3.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND NUT THREAD
surface_treatmentPHOSPHATE OVERALL
nominal_thread_size0.375 INCHES STUD THREAD IN
thread_pitch_diameters+0.3372 TO 0.3397 INCHES STUD THREAD IN
thread_quantity_per_inch16 NUT THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) NUT THREAD
NSN5307-00-558-1820
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A51271 · 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: 1.500 INCHES NOMINAL NUT THREAD IN
•
THREAD PITCH DIAMETERS: +0.3372 TO 0.3397 INCHES STUD THREAD IN
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.375 INCHES STUD THREAD IN
TECHNICAL CHARACTERISTICS
THREAD LENGTH1.500 INCHES NOMINAL NUT THREAD IN
THREAD LENGTH0.440 INCHES MINIMUM AND 0.500 INCHES MAXIMUM STUD THREAD IN
THREAD PITCH DIAMETERS+0.3372 TO 0.3397 INCHES STUD THREAD IN
OVERALL LENGTH3.750 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
SURFACE TREATMENTPHOSPHATE OVERALL
THREAD CLASS2A NUT THREAD A
OTHER ITEMS IN FSC 5307 — Studs
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5307-00-000-6436 5307-00-001-1578 5307-00-001-1761 5307-00-001-2366 5307-00-001-4491 5307-00-001-4624 5307-00-001-4625
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 A51271?
A51271 is a STUD,PLAIN.
What is the NSN for A51271?
A51271 is cataloged in the U.S. Government catalog under NSN 5307-00-558-1820. 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.