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Diameter
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3/8"
5/16"
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7/8"
9/16"
Drive Type
Hex
Finish
Zinc Plated
Head Type
Hex
Length
1"
1-1/2"
1-1/4"
1-3/4"
1/2"
2"
2-1/2"
2-1/4"
2-3/4"
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4-1/4"
5"
5-1/2"
5/8"
6"
6-1/2"
7"
7-1/2"
7/8"
8"
Material
Steel
Product Type
Cap Screw
Steel Grade
5
Thread Type
Coarse
Fine
Diameter
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 1" (24)
 1/2" (38)
 1/4" (39)
 3/4" (32)
 3/8" (40)
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 7/16" (33)
 7/8" (26)
 9/16" (31)
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Drive Type
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 Hex (335)
Finish
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 Zinc Plated (335)
Head Type
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 Hex (335)
Length
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 1" (16)
 1-1/2" (18)
 1-1/4" (15)
 1-3/4" (17)
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 3/4" (9)
 4" (20)
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 5" (20)
 5-1/2" (20)
 5/8" (6)
 6" (20)
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 7" (1)
 7-1/2" (1)
 7/8" (6)
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Material
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 Steel (335)
Product Type
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 Cap Screw (335)
Steel Grade
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 5 (335)
Thread Type
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 Coarse (171)
 Fine (164)


 
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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.