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1/4"-20 Socket Head Machine Screw (Black-Oxide)

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1/4"-20 Socket Head Machine Screw (Black-Oxide)

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.

1/4"-20 Socket Head Machine Screw (Black-Oxide)
SKULengthWishlistPricePurchase
91251A5330.250" (1/4")
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91251A5350.375" (3/8")
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91251A5370.500" (1/2")
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91251A5390.625" (5/8")
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91251A5400.750" (3/4")
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91251A5410.875" (7/8")
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91251A5421.00"
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91251A5441.250" (1-1/4")
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91251A5461.5" (1-1/2")
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91251A5481.75" (1-3/4")
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91251A5502.00"
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SPECS
Material alloy steel
Finish black-oxide
Head Style socket
Head Diameter 0.375"
Thread Size 1/4"-20
Drive Style 3/16” Hex Key

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