PartsTable
Technical Data Sheet
X8-509 ✓ 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: FILLISTER, head_height: 0.194 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.490 INCHES MINIMUM AND 0.518 INCHES MAXIMUM IN, thread_length: 0.389 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN, fastener_length: 0.500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-579-5811, 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
X8-509
NSN: 5305-00-579-5811
FSC: 5305
CAGE: 73460 — EATON CORP TRANSMISSION DIV (USA)
SPECIFICATIONS
head_styleFILLISTER
head_height0.194 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.490 INCHES MINIMUM AND 0.518 INCHES MAXIMUM IN
thread_length0.389 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
fastener_length0.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.312 INCHES IN
minimum_tensile_strength60000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch18
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-00-579-5811
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: X8-509 · 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
SCREW MATERIAL: STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1022 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1527 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1038 OR STEEL COMP 1040 OR STEEL COMP 1541 OR STEEL COMP 1108 OR STEEL COMP 1109 OR STEEL COMP 1110
THREAD DIRECTION: RIGHT-HAND
THREAD QUANTITY PER INCH: 18
THREAD CLASS: 2A A
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
HEAD HEIGHT: 0.194 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
HEAD STYLE: FILLISTER
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SCREW MATERIALSTEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1022 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1527 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1038 OR STEEL COMP 1040 OR STEEL COMP 1541 OR STEEL COMP 1108 OR STEEL COMP 1109 OR STEEL COMP 1110
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH18
THREAD CLASS2A A
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
HEAD HEIGHT0.194 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
HEAD STYLEFILLISTER
FASTENER LENGTH0.500 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.312 INCHES IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 4S STYLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
52150Interchangeable
interchangeable cross-reference
interchangeable
N521-50Interchangeable
interchangeable cross-reference
interchangeable
RS-1766Interchangeable
interchangeable cross-reference
interchangeable
4976-GYInterchangeable
interchangeable cross-reference
interchangeable
4976Interchangeable
interchangeable cross-reference
interchangeable
52150-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X8-509?
X8-509 is a SCREW,MACHINE.
What parts can replace X8-509?
There are 12 known substitutes for X8-509: 52150, N521-50, RS-1766 and 9 more. Substitute compatibility should be verified for your specific system.
Is X8-509 still available?
X8-509 is currently cancelled.
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