PartsTable
Technical Data Sheet
15643-1 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.600 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN, thread_length: 0.559 INCHES MINIMUM IN, fastener_length: 0.750 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 5305-00-015-6431, 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
15643-1
NSN: 5305-00-015-6431
FSC: 5305
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.600 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
thread_length0.559 INCHES MINIMUM IN
screw_materialSTEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020
fastener_length0.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.312 INCHES IN
screw_surface_treatmentCADMIUM OR ZINC
thread_quantity_per_inch18
NSN5305-00-015-6431
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 15643-1 · 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
HEAD STYLE: FLAT COUNTERSUNK
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC ALL MATERIAL RESPONSES
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
THREAD CLASS: 2A A
HEAD DIAMETER: 0.600 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
COUNTERSINK ANGLE: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
NONDEFINITIVE SPEC/STD DATA: III TYPE AND 2C STYLE
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEFLAT COUNTERSUNK
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC ALL MATERIAL RESPONSES
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD CLASS2A A
HEAD DIAMETER0.600 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
NONDEFINITIVE SPEC/STD DATAIII TYPE AND 2C STYLE
FASTENER LENGTH0.750 INCHES NOMINAL IN
THREAD LENGTH0.559 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
P147Interchangeable
interchangeable cross-reference
interchangeable
AR50041Interchangeable
interchangeable cross-reference
interchangeable
74036432Interchangeable
interchangeable cross-reference
interchangeable
9090883-23Interchangeable
interchangeable cross-reference
interchangeable
32034 ITEM 24Interchangeable
interchangeable cross-reference
interchangeable
15643-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 15643-1?
15643-1 is a SCREW,MACHINE.
What parts can replace 15643-1?
There are 8 known substitutes for 15643-1: P147, AR50041, 74036432 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 15643-1?
15643-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-015-6431. This indicates validated use in U.S. government and defense supply chains.
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