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Socket Head Cap Screw Fine Thread Black Steel 5/8-18 * 4" Grade 8 [Cup Point] [Allen Drive]

Socket Head Cap Screw Fine Thread Black Steel 5/8-18 * 4" Grade 8 [Cup Point] [Allen Drive]

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With a tensile strength of 170,000 psi, these Alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.

Alloy steel screws are mildly corrosion resistant in dry environments. Fine and extra-fine threads are closely spaced to prevent loosening from vibration: the finer the thread, the better the resistance. They are not compatible with coarse threads.

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Specifications
Product Number VPCF-07040
Head Type Socket
Socket Head Profile Standard
Drive Style Hex
System of Measurement Inch
Thread Direction Right Hand
Thread Size 5/8"-18
Screw Size Decimal Equivalent 0.625"
Thread Type UNF
Thread Fit Class 3A
Length 4"
Threading Partially Threaded
Min. Thread Length 1-3/4"
Thread Spacing Fine

Head
Diameter 15/16"
Height 5/8"
Drive Size 1/2"
Material Black-Oxide Alloy Steel
Fastener Strength Grade/Class Grade 8
Tensile Strength 170,000 psi
Hardness Rockwell C37
Specifications Met ASTM A574
RoHS Compliant