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Technical Data Sheet
PartsTable / COMPONENT / 120S42
120S42 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, grip_length: 4.047 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN, head_height: 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.500 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN, fastener_length: 4.578 INCHES MINIMUM AND 4.625 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-150-9394, 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
120S42
NSN: 5306-00-150-9394
FSC: 5306
CAGE: 06840 — BENDIX CORP THE (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL
head_styleHEXAGON
grip_length4.047 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN
head_height0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN
thread_class3A A
thread_length0.500 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN
fastener_length4.578 INCHES MINIMUM AND 4.625 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_between_flats0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
NSN5306-00-150-9394
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 120S42 · 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
•
WIDTH BETWEEN FLATS: 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.500 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN
•
GRIP LENGTH: 4.047 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN
•
THREAD CLASS: 3A A
•
MATERIAL: STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL
•
HEAD STYLE: HEXAGON
•
MINIMUM TENSILE STRENGTH: 125000 POUNDS PER SQUARE INCH LBS
•
THREAD QUANTITY PER INCH: 24
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
THREAD LENGTH0.500 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN
GRIP LENGTH4.047 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN
THREAD CLASS3A A
MATERIALSTEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL
HEAD STYLEHEXAGON
MINIMUM TENSILE STRENGTH125000 POUNDS PER SQUARE INCH LBS
THREAD QUANTITY PER INCH24
SHANK UNTHREADED HOLE DIAMETER0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN
FEATURES PROVIDEDFINISHED HEAD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
397-4Upgraded Successor
successor cross-reference
successor
520918Interchangeable
interchangeable cross-reference
interchangeable
TRJ1175Interchangeable
interchangeable cross-reference
interchangeable
994425-9Interchangeable
interchangeable cross-reference
interchangeable
62A0010-500Interchangeable
interchangeable cross-reference
interchangeable
416434-83Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 120S42?
120S42 is a BOLT,MACHINE.
What parts can replace 120S42?
There are 13 known substitutes for 120S42: 397-4, 520918, TRJ1175 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 120S42?
120S42 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-150-9394. 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