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PartsTable / COMPONENT / T5549
T5549 ✓ 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 OVERALL, head_style: HEXAGON, grip_length: 4.125 INCHES NOMINAL IN, head_height: 0.323 INCHES MAXIMUM IN, thread_class: 2A A, grip_diameter: 0.555 INCHES MINIMUM AND 0.563 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 5306-01-553-1337, 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
T5549
NSN: 5306-01-553-1337
FSC: 5306
CAGE: 36MV0 — THE SHYFT GROUP USA, INC DBA THE SHYFT GROUP USA, INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
grip_length4.125 INCHES NOMINAL IN
head_height0.323 INCHES MAXIMUM IN
thread_class2A A
grip_diameter0.555 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
thread_length1.250 INCHES NOMINAL IN
fastener_length5.500 INCHES NOMINAL IN
special_features1/2 INCH - 20 X 5-1/2 INCH GRADE 5 ZINC PLATED HEX CAP SCREW IN
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_between_flats0.750 INCHES MAXIMUM IN
NSN5306-01-553-1337
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: T5549 · 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
•
GRIP DIAMETER: 0.555 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 18
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL: STEEL OVERALL
•
HEAD HEIGHT: 0.348 INCHES MINIMUM AND 0.371 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNF
GRIP DIAMETER0.555 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
SPECIAL FEATURES9/16-18X 5 1/2 GRADE 8 PLAIN FINISH HEX CAP SCREW. WRENCH SIZE 13/16.
THREAD QUANTITY PER INCH18
THREAD DIRECTIONRIGHT-HAND
END ITEM IDENTIFICATIONJERRV 4X4 EOD, 2355-01-532-2174
MATERIALSTEEL OVERALL
HEAD HEIGHT0.348 INCHES MINIMUM AND 0.371 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.562 INCHES IN
GRIP LENGTH4.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
18274-2Interchangeable
interchangeable cross-reference
interchangeable
18274Interchangeable
interchangeable cross-reference
interchangeable
01-04171Interchangeable
interchangeable cross-reference
interchangeable
824419Interchangeable
interchangeable cross-reference
interchangeable
MS35190-260Interchangeable
interchangeable cross-reference
interchangeable
FF-S-92Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is T5549?
T5549 is a BOLT,MACHINE.
What parts can replace T5549?
There are 15 known substitutes for T5549: 18274-2, 18274, 01-04171 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for T5549?
T5549 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-553-1337. 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