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3SH51 ✓ 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 SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.359 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 1.264 INCHES MINIMUM AND 1.375 INCHES MAXIMUM IN, fastener_length: 1.375 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-156-9458, 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
3SH51
NSN: 5305-01-156-9458
FSC: 5305
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.359 INCHES NOMINAL IN
thread_class3A A
thread_length1.264 INCHES MINIMUM AND 1.375 INCHES MAXIMUM IN
fastener_length1.375 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.798 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN
end_item_identificationFAMILY OF HEMTT VEHICLES (HEAVY EXPANDED MOBILITY TACTICAL TRUCKS)
nominal_thread_diameter0.562 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNF
NSN5305-01-156-9458
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3SH51 · 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 SERIES DESIGNATOR: UNF
•
MATERIAL: STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL
•
HEAD HEIGHT: 0.359 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.375 INCHES NOMINAL IN
•
THREAD LENGTH: 1.264 INCHES MINIMUM AND 1.375 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.798 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.562 INCHES IN
•
THREAD QUANTITY PER INCH: 18
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNF
MATERIALSTEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL
HEAD HEIGHT0.359 INCHES NOMINAL IN
FASTENER LENGTH1.375 INCHES NOMINAL IN
THREAD LENGTH1.264 INCHES MINIMUM AND 1.375 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.798 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.562 INCHES IN
THREAD QUANTITY PER INCH18
THREAD CLASS3A A
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
18-1454Interchangeable
interchangeable cross-reference
interchangeable
MILI7231Interchangeable
interchangeable cross-reference
interchangeable
N1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3SH51?
3SH51 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 3SH51?
There are 3 known substitutes for 3SH51: 18-1454, MILI7231, N1. Substitute compatibility should be verified for your specific system.
What is the NSN for 3SH51?
3SH51 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-156-9458. 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