PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 4331U
4331U ✓ 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,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_style: FLAT CHAMFER, head_height: 0.188 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.375 INCHES NOMINAL IN, thread_length: 0.250 INCHES MINIMUM 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 5305-00-473-5394, 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
4331U
NSN: 5305-00-473-5394
FSC: 5305
CAGE: 00141 — ROLLER BEARING CO OF AMERICA, INC DIV PIC DESIGN (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleFLAT CHAMFER
head_height0.188 INCHES NOMINAL IN
thread_class2A A
head_diameter0.375 INCHES NOMINAL IN
thread_length0.250 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
shoulder_length0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentPASSIVATE OVERALL
NSN5305-00-473-5394
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4331U · 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
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
SHOULDER LENGTH: 0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD QUANTITY PER INCH: 32
•
MATERIAL: STEEL COMP 303 OVERALL
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
THREAD SERIES DESIGNATOR: UNF
•
INTERNAL DRIVE STYLE: SLOT
•
THREAD LENGTH: 0.250 INCHES MINIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD DIAMETER0.190 INCHES IN
SHOULDER LENGTH0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM FIRST SHOULDER IN
THREAD QUANTITY PER INCH32
MATERIALSTEEL COMP 303 OVERALL
SHOULDER SHAPEROUND FIRST SHOULDER
THREAD SERIES DESIGNATORUNF
INTERNAL DRIVE STYLESLOT
THREAD LENGTH0.250 INCHES MINIMUM IN
FASTENER LENGTH0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
4331Interchangeable
interchangeable cross-reference
interchangeable
02-0104-0433-01Interchangeable
interchangeable cross-reference
interchangeable
MILR11764Interchangeable
interchangeable cross-reference
interchangeable
ZM-16/UInterchangeable
interchangeable cross-reference
interchangeable
M3982Interchangeable
interchangeable cross-reference
interchangeable
SM-A-839402-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 4331U?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 4331U?
4331U is a SCREW,SHOULDER.
What parts can replace 4331U?
There are 13 known substitutes for 4331U: 4331, 02-0104-0433-01, MILR11764 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4331U?
4331U is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-473-5394. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 4331U

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026