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Technical Data Sheet
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20X53 — BOLT,RIBBED SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

20X53: BOLT,RIBBED SHOULDER.

The BOLT,RIBBED SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 2A STUD THREAD A, thread_length: 1.000 INCHES MINIMUM STUD THREAD IN, overall_length: 3.750 INCHES NOMINAL IN, shoulder_length: 0.188 INCHES NOMINAL IN, style_designator: SHOULDERED. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-070-0024, 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
20X53
NSN: 5306-00-070-0024
NIINs: 000700024, 003530489
FSC: 5306 — Bolts
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
materialSTEEL
thread_class2A STUD THREAD A
thread_length1.000 INCHES MINIMUM STUD THREAD IN
overall_length3.750 INCHES NOMINAL IN
shoulder_length0.188 INCHES NOMINAL IN
special_features0.125 IN. BY 45.0 DEGCHAMFER ON BOTH ENDS 0.062IN. RADIUS BETWEEN SHOULDER AND SHANK. 0.125 IN. RADIUS BETWEEN SHOULDER AND SHANK IN
style_designatorSHOULDERED
thread_directionRIGHT-HAND STUD THREAD
shoulder_diameter1.125 INCHES NOMINAL IN
nominal_thread_size0.750 INCHES STUD THREAD IN
nut_end_shank_length1.250 INCHES NOMINAL IN
distance_across_flats0.938 INCHES NOMINAL IN
NSN5306-00-070-0024
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20X53 · 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
•
HEAD HEIGHT: 0.335 INCHES NOMINAL IN
•
RIB INCLUDED ANGLE: 45.0 DEGREES NOMINAL
•
FASTENER LENGTH: 2.720 INCHES NOMINAL IN
•
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS: 0.135 INCHES NOMINAL IN
•
THREAD LENGTH: 1.125 INCHES MINIMUM IN
•
SHOULDER SHAPE: RIBBED FIRST SHOULDER
•
RIB LENGTH: 0.440 INCHES NOMINAL IN
•
RIB MINOR DIAMETER: 0.938 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.335 INCHES NOMINAL IN
RIB INCLUDED ANGLE45.0 DEGREES NOMINAL
FASTENER LENGTH2.720 INCHES NOMINAL IN
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS0.135 INCHES NOMINAL IN
THREAD LENGTH1.125 INCHES MINIMUM IN
SHOULDER SHAPERIBBED FIRST SHOULDER
RIB LENGTH0.440 INCHES NOMINAL IN
RIB MINOR DIAMETER0.938 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEPAN NO. 2
SUBSTITUTES & CROSS-REFERENCES 1
P30886Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20X53?
20X53 is a BOLT,RIBBED SHOULDER.
What parts can replace 20X53?
There is 1 known substitute for 20X53: P30886. Substitute compatibility should be verified for your specific system.
What is the NSN for 20X53?
20X53 is cataloged in the U.S. Government catalog under NSN 5306-00-070-0024. This indicates validated use in U.S. government and defense supply chains.
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