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PartsTable / COMPONENT / 593-6405224 PIECE 81
593-6405224 PIECE 81 ✓ 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: PAN, head_height: 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN, thread_length: 0.200 INCHES NOMINAL IN, screw_material: STEEL CORROSION RESISTING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-353-2089, 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
593-6405224 PIECE 81
NSN: 5305-01-353-2089
FSC: 5305
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
head_stylePAN
head_height0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN
thread_length0.200 INCHES NOMINAL IN
screw_materialSTEEL CORROSION RESISTING
fastener_length0.300 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-353-2089
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 593-6405224 PIECE 81 · 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 QUANTITY PER INCH: 20
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD LENGTH: 0.200 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
FASTENER LENGTH: 0.300 INCHES NOMINAL IN
•
SCREW MATERIAL: STEEL CORROSION RESISTING
•
HEAD STYLE: PAN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH20
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD LENGTH0.200 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
FASTENER LENGTH0.300 INCHES NOMINAL IN
SCREW MATERIALSTEEL CORROSION RESISTING
HEAD STYLEPAN
HEAD DIAMETER0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
NASM35214Interchangeable
interchangeable cross-reference
interchangeable
5305PL0144760Interchangeable
interchangeable cross-reference
interchangeable
G0015246Interchangeable
interchangeable cross-reference
interchangeable
5305PL2228214Interchangeable
interchangeable cross-reference
interchangeable
ANSI B18.6.3Interchangeable
interchangeable cross-reference
interchangeable
FF-S-92Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 593-6405224 PIECE 81?
593-6405224 PIECE 81 is a SCREW,MACHINE.
What parts can replace 593-6405224 PIECE 81?
There are 24 known substitutes for 593-6405224 PIECE 81: NASM35214, 5305PL0144760, G0015246 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 593-6405224 PIECE 81?
593-6405224 PIECE 81 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-353-2089. 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