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B490230 — STUD,STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

B490230: 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: 1.810 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 5307-01-157-8415, 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
B490230
NSN: 5307-01-157-8415
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_length1.810 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) NUT THREAD
NSN5307-01-157-8415
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: B490230 · 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 LENGTH0.845 INCHES NOMINAL NUT THREAD IN
STYLE DESIGNATORSTEPPED
OVERALL LENGTH1.810 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
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 B490230?
B490230 is a STUD,STEPPED.
What is the NSN for B490230?
B490230 is cataloged in the U.S. Government catalog under NSN 5307-01-157-8415. 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.