PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 3-8X3-4
3-8X3-4 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY, head_style: HEXAGON, head_height: 0.234 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.750 INCHES NOMINAL IN, fastener_length: 0.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-042-7923, 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
3-8X3-4
NSN: 5306-00-042-7923
FSC: 5306
CAGE: 0MKW7 — MINNPAR, LLC DBA MINNPAR (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
head_styleHEXAGON
head_height0.234 INCHES NOMINAL IN
thread_class2A A
thread_length0.750 INCHES NOMINAL IN
fastener_length0.750 INCHES NOMINAL IN
hardness_rating100.0 ROCKWELL B MAXIMUM OVERALL
thread_directionRIGHT-HAND
basic_shape_styleFLAT
features_providedUNFINISHED HEAD
surface_treatmentCADMIUM OR ZINC OVERALL
width_between_flats0.5440 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
NSN5306-00-042-7923
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3-8X3-4 · 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
•
WIDTH BETWEEN FLATS: 0.5440 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
MINIMUM YIELD STRENGTH: 69000 POUNDS PER SQUARE INCH LBS
•
THREAD CLASS: 2A A
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD HEIGHT: 0.234 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: 3 TYPE AND 2 GRADE
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS0.5440 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
MINIMUM YIELD STRENGTH69000 POUNDS PER SQUARE INCH LBS
THREAD CLASS2A A
THREAD DIRECTIONRIGHT-HAND
HEAD HEIGHT0.234 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA3 TYPE AND 2 GRADE
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
HARDNESS RATING100.0 ROCKWELL B MAXIMUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
3-8X3-4Interchangeable
interchangeable cross-reference
interchangeable
QQA268Interchangeable
interchangeable cross-reference
interchangeable
427923Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3-8X3-4?
3-8X3-4 is a BOLT,MACHINE.
What parts can replace 3-8X3-4?
There are 3 known substitutes for 3-8X3-4: 3-8X3-4, QQA268, 427923. Substitute compatibility should be verified for your specific system.
Is 3-8X3-4 still available?
3-8X3-4 is currently cancelled.
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Last verified: July 2026