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PartsTable / COMPONENT / 3043T21
3043T21 ✓ 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 BOLT,U is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2A A, thread_length: 1.375 INCHES NOMINAL IN, style_designator: ROUND BEND, thread_direction: RIGHT-HAND, surface_treatment: ZINC OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-241-0754, 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
3043T21
NSN: 5306-01-241-0754
FSC: 5306
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A A
thread_length1.375 INCHES NOMINAL IN
style_designatorROUND BEND
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
inside_distance_between_shanks2.000 INCHES NOMINAL IN
distance_from_inside_center_of_bend_to_bolt_end3.250 INCHES NOMINAL IN
NSN5306-01-241-0754
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3043T21 · 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
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
SURFACE TREATMENT: ZINC OVERALL
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD QUANTITY PER INCH: 20
•
STYLE DESIGNATOR: ROUND BEND
•
DISTANCE FROM INSIDE CENTER OF BEND TO BOLT END: 3.250 INCHES NOMINAL IN
•
THREAD LENGTH: 1.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SURFACE TREATMENTZINC OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD QUANTITY PER INCH20
STYLE DESIGNATORROUND BEND
DISTANCE FROM INSIDE CENTER OF BEND TO BOLT END3.250 INCHES NOMINAL IN
THREAD LENGTH1.375 INCHES NOMINAL IN
INSIDE DISTANCE BETWEEN SHANKS2.000 INCHES NOMINAL IN
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
102302-8Upgraded Successor
successor cross-reference
successor
3038-9012PC9Upgraded Successor
successor cross-reference
successor
115-9-9Upgraded Successor
successor cross-reference
successor
SIZE9Upgraded Successor
successor cross-reference
successor
28901-14Upgraded Successor
successor cross-reference
successor
9Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3043T21?
3043T21 is a BOLT,U.
What parts can replace 3043T21?
There are 7 known substitutes for 3043T21: 102302-8, 3038-9012PC9, 115-9-9 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3043T21?
3043T21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-241-0754. 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