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ST3M497-4-5 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DOUBLE HEXAGON, head_height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-044-2964, 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
ST3M497-4-5
NSN: 5306-01-044-2964
FSC: 5306
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDOUBLE HEXAGON
head_height0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN
thread_class3A A
thread_length0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.693 INCHES MINIMUM AND 0.740 INCHES MAXIMUM IN
shoulder_length0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN
width_between_flats0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_diameter0.250 INCHES IN
NSN5306-01-044-2964
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M497-4-5 · 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
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
FASTENER LENGTH: 0.693 INCHES MINIMUM AND 0.740 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN
•
SPECIFICATION/STANDARD DATA: 76301-ST3-497 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF)
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SHOULDER SHAPEROUND FIRST SHOULDER
FASTENER LENGTH0.693 INCHES MINIMUM AND 0.740 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
SHOULDER DIAMETER0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN
SPECIFICATION/STANDARD DATA76301-ST3-497 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
NOMINAL THREAD DIAMETER0.250 INCHES IN
MATERIALSTEEL OVERALL
THREAD DIRECTIONRIGHT-HAND
SHOULDER LENGTH0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM FIRST SHOULDER IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
B-6100-THInterchangeable
interchangeable cross-reference
interchangeable
67A219C41Interchangeable
interchangeable cross-reference
interchangeable
A-13668Interchangeable
interchangeable cross-reference
interchangeable
BM17019-4-5XInterchangeable
Same NIIN cross-reference
interchangeable
MA5497-4-5Interchangeable
Same NIIN cross-reference
interchangeable
109453-4-5XInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST3M497-4-5?
ST3M497-4-5 is a BOLT,SHOULDER.
What parts can replace ST3M497-4-5?
There are 7 known substitutes for ST3M497-4-5: B-6100-TH, 67A219C41, A-13668 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M497-4-5?
ST3M497-4-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-044-2964. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026