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Technical Data Sheet
PartsTable / COMPONENT / 4044U
4044U ✓ 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 303 OVERALL, head_style: KNURLED NO. 1, head_height: 0.188 INCHES NOMINAL IN, point_style: FLAT, thread_class: 2A A, head_diameter: 0.500 INCHES NOMINAL IN.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-470-8379, 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
4044U
NSN: 5305-00-470-8379
FSC: 5305
CAGE: 00141 — ROLLER BEARING CO OF AMERICA, INC DIV PIC DESIGN (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleKNURLED NO. 1
head_height0.188 INCHES NOMINAL IN
point_styleFLAT
thread_class2A A
head_diameter0.500 INCHES NOMINAL IN
thread_length1.250 INCHES MINIMUM IN
fastener_length1.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
nominal_thread_diameter0.190 INCHES IN
thread_quantity_per_inch32
NSN5305-00-470-8379
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4044U · 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 LENGTH: 1.250 INCHES MINIMUM IN
•
HEAD HEIGHT: 0.188 INCHES NOMINAL IN
•
THREAD CLASS: 2A A
•
THREAD SERIES DESIGNATOR: UNF
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 303 OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH1.250 INCHES MINIMUM IN
HEAD HEIGHT0.188 INCHES NOMINAL IN
THREAD CLASS2A A
THREAD SERIES DESIGNATORUNF
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 303 OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
POINT STYLEFLAT
FASTENER LENGTH1.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
2102-04-00Interchangeable
interchangeable cross-reference
interchangeable
99061-1Interchangeable
interchangeable cross-reference
interchangeable
5940PL1393415Interchangeable
interchangeable cross-reference
interchangeable
A-A-410Interchangeable
interchangeable cross-reference
interchangeable
31185Interchangeable
interchangeable cross-reference
interchangeable
65875Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4044U?
4044U is a THUMBSCREW.
What parts can replace 4044U?
There are 23 known substitutes for 4044U: 2102-04-00, 99061-1, 5940PL1393415 and 20 more. Substitute compatibility should be verified for your specific system.
Is 4044U still available?
4044U 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