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B486331 — STUD,STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

B486331: STUD,STEPPED.

The STUD,STEPPED is a the manufacturer industrial component. Key specifications include thread_class: 3A NUT THREAD A, thread_length: 0.650 INCHES NOMINAL STUD THREAD IN, overall_length: 1.530 INCHES NOMINAL IN, shank_diameter: 0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN, style_designator: STEPPED, thread_direction: RIGHT-HAND NUT THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-157-8414, 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
B486331
NSN: 5307-01-157-8414
FSC: 5307 — Studs
CAGE: K0378 — ROLLS-ROYCE PLC DIV DEFENSE (EUROPE) (GBR)
SPECIFICATIONS
thread_class3A NUT THREAD A
thread_length0.650 INCHES NOMINAL STUD THREAD IN
overall_length1.530 INCHES NOMINAL IN
shank_diameter0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN
style_designatorSTEPPED
thread_directionRIGHT-HAND NUT THREAD
nominal_thread_size0.250 INCHES NUT THREAD IN
thread_quantity_per_inch24 STUD THREAD
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) STUD THREAD
NSN5307-01-157-8414
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: B486331 · 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
•
SHANK DIAMETER: 0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.650 INCHES NOMINAL STUD THREAD IN
•
STYLE DESIGNATOR: STEPPED
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.375 INCHES STUD THREAD IN
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN
THREAD LENGTH0.650 INCHES NOMINAL STUD THREAD IN
THREAD LENGTH0.565 INCHES NOMINAL NUT THREAD IN
STYLE DESIGNATORSTEPPED
OVERALL LENGTH1.530 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.375 INCHES STUD THREAD IN
NOMINAL THREAD SIZE0.250 INCHES NUT THREAD IN
THREAD CLASS3A NUT THREAD A
SUBSTITUTES & CROSS-REFERENCES 1
99-535-5388Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B486331?
B486331 is a STUD,STEPPED.
What parts can replace B486331?
There is 1 known substitute for B486331: 99-535-5388. Substitute compatibility should be verified for your specific system.
What is the NSN for B486331?
B486331 is cataloged in the U.S. Government catalog under NSN 5307-01-157-8414. 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.