• Item:Hex Socket Button Head Cap Screw, Alloy Steel Hex Socket Button head Cap Screw, Hex Socket Button head with Flange Screw, Torx Button Head Cap Screw, Stainless Steel Hex Socket Button head Cap Screw
  • According To:ASME B18.3-2002
  • Material:Alloy Steel SCM435、Stainless Steel 304
  • Hardness:HRC 38~44
  • Surface Treatment:Black Oxide, Black phosphate plated, Bright Zinc plated, CR3+ plated, Black Zinc plated, Nickel plated, Nylon or ND patch
  • Screw Threads:ANSI B1.1 UNC,UNF
  • Class of Thread:ANSI B1.1 class 3A

Unit:inch

D A H S J T F L
Nominal
Size or
Basic Screw
Diameter
Head
Diameter
Head
Height
Hexagon
Head
Size
Height
Hexagon
Socket Size
Key
Engage-ment
Fillet
Transition
Diameter
Maximum
Standard
Length
Max. Min. Max. Min. Ref. Nom. Min. Max. Min. Nom.
#6
0.1380
0.262 0.250 0.073 0.063 0.015 5/64
0.078
0.044 0.158 0.148 5/8
#8
0.1640
0.312 0.298 0.087 0.077 0.015 3/32
0.094
0.052 0.194 0.184 3/4
#10
0.1900
0.361 0.347 0.101 0.091 0.020 1/8
0.125
0.070 0.220 0.210 1
1/4
0.2500
0.437 0.419 0.132 0.122 0.031 5/32
0.156
0.087 0.290 0.280 1
5/16
0.3125
0.547 0.527 0.166 0.152 0.031 3/16
0.188
0.105 0.353 0.343 1
3/8
0.3750
0.656 0.636 0.199 0.185 0.031 7/32
0.219
0.122 0.415 0.405 1 1/4
1/2
0.5000
0.875 0.851 0.265 0.245 0.046 5/16
0.312
0.175 0.560 0.540 2
5/8
0.6250
1.000 0.970 0.331 0.311 0.062 3/8
0.375
0.210 0.685 0.665 2