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B493567 — STUD,RECESSED AND STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

B493567: STUD,RECESSED AND STEPPED.

The STUD,RECESSED AND STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, thread_class: 3A STUD THREAD A, thread_length: 0.650 INCHES NOMINAL STUD THREAD IN, overall_length: 2.180 INCHES NOMINAL IN, style_designator: RECESSED AND STEPPED, thread_direction: RIGHT-HAND NUT THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-157-8409, 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
B493567
NSN: 5307-01-157-8409
FSC: 5307 — Studs
CAGE: K0378 — ROLLS-ROYCE PLC DIV DEFENSE (EUROPE) (GBR)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
thread_class3A STUD THREAD A
thread_length0.650 INCHES NOMINAL STUD THREAD IN
overall_length2.180 INCHES NOMINAL IN
style_designatorRECESSED AND STEPPED
thread_directionRIGHT-HAND NUT THREAD
nominal_thread_size0.250 INCHES NUT THREAD IN
thread_quantity_per_inch28 NUT THREAD
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) STUD THREAD
length_of_recessed_portion_of_shank0.300 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
diameter_of_recessed_portion_of_shank0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN
NSN5307-01-157-8409
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: B493567 · 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: 0.650 INCHES NOMINAL STUD THREAD IN
•
STYLE DESIGNATOR: RECESSED AND STEPPED
•
DIAMETER OF RECESSED PORTION OF SHANK: 0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.375 INCHES STUD THREAD IN
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.650 INCHES NOMINAL STUD THREAD IN
THREAD LENGTH0.880 INCHES NOMINAL NUT THREAD IN
STYLE DESIGNATORRECESSED AND STEPPED
OVERALL LENGTH2.180 INCHES NOMINAL IN
DIAMETER OF RECESSED PORTION OF SHANK0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM 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
LENGTH OF RECESSED PORTION OF SHANK0.300 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
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 1
99-971-5634Reference 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 B493567?
B493567 is a STUD,RECESSED AND STEPPED.
What parts can replace B493567?
There is 1 known substitute for B493567: 99-971-5634. Substitute compatibility should be verified for your specific system.
What is the NSN for B493567?
B493567 is cataloged in the U.S. Government catalog under NSN 5307-01-157-8409. 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.