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Cap Screw
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9/16"
Length
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4-1/4"
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5-1/2"
5/8"
6"
6-1/2"
7"
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8"
Material
Steel
Thread Type
Coarse
Fine
Threads Per Inch
8
9
10
11
12
13
14
16
18
20
24
28
Head Type
Hex
Steel Grade
5
Drive Type
Hex
Finish
Zinc Plated
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 Cap Screw(345)
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Diameter
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 1"(24)
 1/2"(39)
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 3/4"(33)
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Length
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 1"(16)
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 1-3/4"(18)
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 4"(20)
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Material
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 Steel(345)
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Threads Per Inch
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 10(16)
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Head Type
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 Hex(345)
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 5(345)
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 Hex(345)
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 Zinc Plated(345)
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Hex Grade 5 Zinc Plated

Hex head cap screws are manufactured to dimensional standards of ASME B18.2.1 and to various material and mechanical standards of ASTM and SAE. The length of a cap screw is measured from under the head to the extreme end of the screw. The standard thread length is two times the diameter plus 1/4" up to 6" length and two times the diameter plus 1/2" for screws longer than 6". Shorter length screws are fully threaded. Product standards require the manufacturer's head marking to appear on the top of all hex cap screws 1/4" diameter and larger.

Grade 5 (A449) Cap Screws are medium strength fasteners that achieve their strength from a quench and temper heat treatment and have a greater tensile strength than a Grade 2. Yield-to-tensile ratio is the lowest of all heat treated steels.

   

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