PartsTable
Technical Data Sheet
1604A0 ✓ 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 head_style: HEXAGON, grip_length: 3.750 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 2.250 INCHES MINIMUM IN, fastener_length: 6.000 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-434-4638, 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
1604A0
NSN: 5306-00-434-4638
FSC: 5306
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
head_styleHEXAGON
grip_length3.750 INCHES NOMINAL IN
thread_class3A A
thread_length2.250 INCHES MINIMUM IN
fastener_length6.000 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.875 INCHES IN
thread_quantity_per_inch9
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5306-00-434-4638
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1604A0 · 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 SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
THREAD LENGTH: 2.250 INCHES MINIMUM IN
THREAD DIRECTION: RIGHT-HAND
HEAD STYLE: HEXAGON
THREAD CLASS: 3A A
FASTENER LENGTH: 6.000 INCHES NOMINAL IN
GRIP LENGTH: 3.750 INCHES NOMINAL IN
THREAD QUANTITY PER INCH: 9
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD LENGTH2.250 INCHES MINIMUM IN
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEHEXAGON
THREAD CLASS3A A
FASTENER LENGTH6.000 INCHES NOMINAL IN
GRIP LENGTH3.750 INCHES NOMINAL IN
THREAD QUANTITY PER INCH9
NOMINAL THREAD DIAMETER0.875 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
522Interchangeable
interchangeable cross-reference
interchangeable
43-0004-00Interchangeable
interchangeable cross-reference
interchangeable
EN22Interchangeable
interchangeable cross-reference
interchangeable
312183-101Interchangeable
interchangeable cross-reference
interchangeable
312183-401Interchangeable
interchangeable cross-reference
interchangeable
312183-201Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1604A0?
1604A0 is a BOLT,MACHINE.
What parts can replace 1604A0?
There are 8 known substitutes for 1604A0: 522, 43-0004-00, EN22 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1604A0?
1604A0 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-434-4638. This indicates validated use in U.S. government and defense supply chains.
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