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Technical Data Sheet
PartsTable / COMPONENT / 18AX337
18AX337 ✓ 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 STUD,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL, thread_length: 1.219 INCHES MAXIMUM NUT THREAD IN, overall_length: 3.469 INCHES NOMINAL IN, hardness_rating: 18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM, shoulder_length: 0.188 INCHES NOMINAL IN, special_features: 0.125 IN. RADIUS BETWEEN WRENCH FLAT SHOULDER AND NUT END IN.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-514-6835, 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
18AX337
NSN: 5307-00-514-6835
FSC: 5307
CAGE: 89619 — MACK TRUCKS, INC. DBA MACUNGIE OPERATIONS DIV LEHIGH VALLEY OPERATIONS (USA)
SPECIFICATIONS
materialSTEEL
thread_length1.219 INCHES MAXIMUM NUT THREAD IN
overall_length3.469 INCHES NOMINAL IN
hardness_rating18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
shoulder_length0.188 INCHES NOMINAL IN
special_features0.125 IN. RADIUS BETWEEN WRENCH FLAT SHOULDER AND NUT END IN
style_designatorSHOULDERED
thread_directionRIGHT-HAND NUT THREAD
shoulder_diameter1.125 INCHES MINIMUM AND 1.219 INCHES MAXIMUM IN
nominal_thread_size0.750 INCHES NUT THREAD IN
nut_end_shank_length0.875 INCHES NOMINAL IN
distance_across_flats0.938 INCHES NOMINAL IN
NSN5307-00-514-6835
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 18AX337 · 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 LENGTH: 0.188 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
HARDNESS RATING: 18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
•
THREAD QUANTITY PER INCH: 16 NUT THREAD
•
NOMINAL THREAD SIZE: 0.750 INCHES NUT THREAD IN
•
STUD END SHANK LENGTH: 0.115 INCHES NOMINAL IN
•
THREAD PITCH DIAMETERS: +0.7044 TO 0.7084 INCHES NUT THREAD IN
•
DISTANCE ACROSS FLATS: 0.938 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SHOULDER LENGTH0.188 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
HARDNESS RATING18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
THREAD QUANTITY PER INCH16 NUT THREAD
NOMINAL THREAD SIZE0.750 INCHES NUT THREAD IN
STUD END SHANK LENGTH0.115 INCHES NOMINAL IN
THREAD PITCH DIAMETERS+0.7044 TO 0.7084 INCHES NUT THREAD IN
DISTANCE ACROSS FLATS0.938 INCHES NOMINAL IN
THREAD QUANTITY PER INCH16 STUD THREAD
NUT END SHANK DIAMETER0.783 INCHES MINIMUM AND 0.786 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
13096Interchangeable
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20X54Interchangeable
interchangeable cross-reference
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A2024636Interchangeable
interchangeable cross-reference
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16026Interchangeable
interchangeable cross-reference
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L38Interchangeable
interchangeable cross-reference
interchangeable
5573018Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18AX337?
18AX337 is a STUD,SHOULDERED.
What parts can replace 18AX337?
There are 29 known substitutes for 18AX337: 13096, 20X54, A2024636 and 26 more. Substitute compatibility should be verified for your specific system.
Is 18AX337 still available?
18AX337 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026