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PartsTable / COMPONENT / 4AX22Z
4AX22Z ✓ 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 material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.156 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.750 INCHES MINIMUM IN, fastener_length: 1.000 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-018-0022, 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
4AX22Z
NSN: 5305-00-018-0022
FSC: 5305
CAGE: 76040 — MACK TRUCKS INC PARTS OPN (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.156 INCHES NOMINAL IN
thread_class2A A
thread_length0.750 INCHES MINIMUM IN
fastener_length1.000 INCHES NOMINAL IN
hardness_rating23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_between_flats0.438 INCHES NOMINAL IN
nominal_thread_diameter0.250 INCHES IN
minimum_tensile_strength120000 POUNDS PER SQUARE INCH LBS
NSN5305-00-018-0022
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4AX22Z · 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: 0.438 INCHES NOMINAL IN
•
THREAD CLASS: 2A A
•
THREAD DIRECTION: RIGHT-HAND
•
FASTENER LENGTH: 1.000 INCHES NOMINAL IN
•
HARDNESS RATING: 23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL: STEEL OVERALL
•
HEAD HEIGHT: 0.156 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS0.438 INCHES NOMINAL IN
THREAD CLASS2A A
THREAD DIRECTIONRIGHT-HAND
FASTENER LENGTH1.000 INCHES NOMINAL IN
HARDNESS RATING23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL OVERALL
HEAD HEIGHT0.156 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
HEAD STYLEHEXAGON
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
180044Interchangeable
interchangeable cross-reference
interchangeable
18004Interchangeable
interchangeable cross-reference
interchangeable
ESP-B-2.121-PPInterchangeable
interchangeable cross-reference
interchangeable
0400078Interchangeable
interchangeable cross-reference
interchangeable
13101240Interchangeable
interchangeable cross-reference
interchangeable
306-145KInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4AX22Z?
4AX22Z is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 4AX22Z?
There are 10 known substitutes for 4AX22Z: 180044, 18004, ESP-B-2.121-PP and 7 more. Substitute compatibility should be verified for your specific system.
Is 4AX22Z still available?
4AX22Z 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