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Technical Data Sheet
PartsTable / COMPONENT / 4270-ZX-388
4270-ZX-388 ✓ 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: NICKEL ALLOY 400 OVERALL, head_style: HEXAGON, head_height: 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.750 INCHES NOMINAL IN, fastener_length: 2.750 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 5306-01-377-7296, 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
4270-ZX-388
NSN: 5306-01-377-7296
FSC: 5306
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 OVERALL
head_styleHEXAGON
head_height0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
thread_class2A A
thread_length1.750 INCHES NOMINAL IN
fastener_length2.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
nominal_thread_diameter0.750 INCHES IN
thread_quantity_per_inch10
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationQQ-N-181 CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5306-01-377-7296
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4270-ZX-388 · 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: 1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD STYLE: HEXAGON
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-181 CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD LENGTH: 1.750 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY 400 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
HEAD HEIGHT0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-181 CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD LENGTH1.750 INCHES NOMINAL IN
MATERIALNICKEL ALLOY 400 OVERALL
THREAD CLASS2A A
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
M85061-24BInterchangeable
interchangeable cross-reference
interchangeable
3615-24DInterchangeable
interchangeable cross-reference
interchangeable
MIL-C-85061Interchangeable
interchangeable cross-reference
interchangeable
361524Interchangeable
interchangeable cross-reference
interchangeable
R128Interchangeable
interchangeable cross-reference
interchangeable
WAUG3400Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4270-ZX-388?
4270-ZX-388 is a BOLT,MACHINE.
What parts can replace 4270-ZX-388?
There are 11 known substitutes for 4270-ZX-388: M85061-24B, 3615-24D, MIL-C-85061 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4270-ZX-388?
4270-ZX-388 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-377-7296. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026