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Technical Data Sheet
PartsTable / COMPONENT / 355578S
355578S ✓ 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 material: STEEL COMP 1035 OR STEEL COMP 1040 OVERALL, head_style: HEXAGON, grip_length: 0.250 INCHES NOMINAL IN, head_height: 0.281 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.563 INCHES MINIMUM 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 5306-00-737-3178, 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
355578S
NSN: 5306-00-737-3178
FSC: 5306
CAGE: 23040 — FORD MOTOR CO FORD PARTS AND SERVICE DIV GOVERNMENT PART SALES (USA)
SPECIFICATIONS
materialSTEEL COMP 1035 OR STEEL COMP 1040 OVERALL
head_styleHEXAGON
grip_length0.250 INCHES NOMINAL IN
head_height0.281 INCHES NOMINAL IN
thread_class3A A
thread_length0.563 INCHES MINIMUM IN
fastener_length0.813 INCHES NOMINAL IN
hardness_rating21.0 ROCKWELL C MINIMUM AND 27.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedCASEHARDENED AND UNFINISHED HEAD
width_between_flats0.563 INCHES NOMINAL IN
nominal_thread_diameter0.375 INCHES IN
NSN5306-00-737-3178
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 355578S · 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: 0.563 INCHES MINIMUM IN
•
HEAD STYLE: HEXAGON
•
THREAD SERIES DESIGNATOR: UNF
•
GRIP LENGTH: 0.250 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
THREAD CLASS: 3A A
•
HARDNESS RATING: 21.0 ROCKWELL C MINIMUM AND 27.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 95019 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.563 INCHES MINIMUM IN
HEAD STYLEHEXAGON
THREAD SERIES DESIGNATORUNF
GRIP LENGTH0.250 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
THREAD CLASS3A A
HARDNESS RATING21.0 ROCKWELL C MINIMUM AND 27.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION95019 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HEAD HEIGHT0.281 INCHES NOMINAL IN
FEATURES PROVIDEDCASEHARDENED AND UNFINISHED HEAD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
V773Interchangeable
interchangeable cross-reference
interchangeable
A903Interchangeable
interchangeable cross-reference
interchangeable
S758Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 355578S?
355578S is a BOLT,MACHINE.
What parts can replace 355578S?
There are 3 known substitutes for 355578S: V773, A903, S758. Substitute compatibility should be verified for your specific system.
What is the NSN for 355578S?
355578S is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-737-3178. 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