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Technical Data Sheet
PartsTable / COMPONENT / 4053U
4053U ✓ 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 THUMBSCREW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL, head_style: KNURLED NO. 1, head_height: 0.188 INCHES NOMINAL IN, point_style: FLAT, thread_class: 2A A, head_diameter: 0.750 INCHES NOMINAL 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 5305-00-958-5969, 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
4053U
NSN: 5305-00-958-5969
FSC: 5305
CAGE: 00141 — ROLLER BEARING CO OF AMERICA, INC DIV PIC DESIGN (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL
head_styleKNURLED NO. 1
head_height0.188 INCHES NOMINAL IN
point_styleFLAT
thread_class2A A
head_diameter0.750 INCHES NOMINAL IN
thread_length1.625 INCHES MINIMUM IN
fastener_length2.000 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch20
NSN5305-00-958-5969
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4053U · 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
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7720 MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
MATERIAL: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL
•
THREAD LENGTH: 1.625 INCHES MINIMUM IN
•
HEAD STYLE: KNURLED NO. 1
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD HEIGHT: 0.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPASSIVATE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720 MIL SPEC ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL
THREAD LENGTH1.625 INCHES MINIMUM IN
HEAD STYLEKNURLED NO. 1
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD HEIGHT0.188 INCHES NOMINAL IN
POINT STYLEFLAT
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
2373-478PCR3Interchangeable
interchangeable cross-reference
interchangeable
2100-158741PC21Interchangeable
interchangeable cross-reference
interchangeable
2100-811749PC21Interchangeable
interchangeable cross-reference
interchangeable
80374-1Interchangeable
interchangeable cross-reference
interchangeable
10342Interchangeable
interchangeable cross-reference
interchangeable
10342-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4053U?
4053U is a THUMBSCREW.
What parts can replace 4053U?
There are 18 known substitutes for 4053U: 2373-478PCR3, 2100-158741PC21, 2100-811749PC21 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4053U?
4053U is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-958-5969. 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