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2-56 Black-Oxide Socket Head Machine Screws

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Our Socket Head Machine Screws are the strongest screws we offer.  These screws are heat treated, have a black-oxide finish and exceed Grade 8 standards. These are the same screws that are supplied in our mechanical kits.  From 1.00” length and up these screws are not fully threaded.  Machined from high-strength alloy steel with a Rockwell hardness of C39-C45 and a minumum tensile strength of 180,000 psi. Length is measured from below the head.

2-56 Black-Oxide Socket Head Machine Screws
SKULengthWishlistPricePurchase
91251A0720.125" (1/8")
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91251A0760.1875" (3/16")
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91251A0770.250" (1/4")
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91251A0620.3125" (5/16")
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91251A0790.375" (3/8")
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91251A0600.4375" (7/16")
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91251A0810.500" (1/2")
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91251A1020.625" (5/8")
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91251A1030.750" (3/4")
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91251A8260.875" (7/8")
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91251A1091.00"
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SPECS
Material alloy steel
Finish black-oxide
Head Style socket
Thread Size 2-56
Thread Type full thread
Drive Style 5/64” Hex Key

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