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  6. ASME B18.3 Hexagon And Spline Socket Set Screw Optional Cup Points

ASME B18.3 Hexagon And Spline Socket Set Screw Optional Cup Points

ASME B18.3 Hexagon And Spline Socket Set Screw Standard covers complete general and dimensional data for hexagon and spline socket set screw optional cup points recognized as an American National Standard. Also included are appendices that provide specifications for hexagon socket gages and gaging, tables showing applicability of keys and bits to these screws, drill and counterbore sizes for socket head cap screws, and formulas used for dimensional data. However, where questions arise concerning acceptance of product, the dimensions in the tables shall govern over recalculation by formula. Recess dimensions for Type VI recesses are given in Mandatory Appendix III.

ASME B18.3 Hexagon And Spline Socket Set Screw Optional Cup Points

Nom. Size Point Dia. Point Dia. Point Dia. Point Length
Max. Min. Max. Min. Max. Min. Max. Min.
C C1 C2 S
ASME B18.3 - #0 0.033 0.027 0.032 0.027 0.027 0.022 0.007 0.004
ASME B18.3 - #1 0.04 0.033 0.038 0.033 0.035 0.03 0.008 0.005
ASME B18.3 - #2 0.047 0.039 0.043 0.038 0.043 0.038 0.01 0.007
ASME B18.3 - #3 0.054 0.045 0.05 0.045 0.051 0.046 0.011 0.007
ASME B18.3 - #4 0.061 0.051 0.056 0.051 0.059 0.054 0.013 0.008
ASME B18.3 - #5 0.067 0.057 0.062 0.056 0.068 0.063 0.014 0.009
ASME B18.3 - #6 0.074 0.064 0.069 0.062 0.074 0.068 0.017 0.012
ASME B18.3 - #8 0.087 0.076 0.082 0.074 0.09 0.084 0.021 0.016
ASME B18.3 - #10 0.102 0.088 0.095 0.086 0.101 0.095 0.024 0.019
ASME B18.3 - 1⁄4 0.132 0.118 0.125 0.114 0.156 0.15 0.027 0.022
ASME B18.3 - 5⁄16 0.172 0.156 0.156 0.144 0.19 0.185 0.038 0.033
ASME B18.3 - 3⁄8 0.212 0.194 0.187 0.174 0.241 0.236 0.041 0.036
ASME B18.3 - 7⁄16 0.252 0.232 0.218 0.204 0.286 0.281 0.047 0.042
ASME B18.3 - 1⁄2 0.291 0.27 0.25 0.235 0.333 0.328 0.054 0.049
ASME B18.3 - 5⁄8 0.371 0.347 0.312 0.295 0.425 0.42 0.067 0.062
ASME B18.3 - 3⁄4 0.45 0.425 0.375 0.357 0.523 0.518 0.081 0.076
ASME B18.3 - 7⁄8 0.53 0.502 0.437 0.418 ... ... ... ...
ASME B18.3 - 1 0.609 0.579 0.5 0.48 ... ... ... ...
ASME B18.3 - 1 1⁄8 0.689 0.655 0.562 0.542 ... ... ... ...
ASME B18.3 - 1 1⁄4 0.767 0.733 0.625 0.605 ... ... ... ...
ASME B18.3 - 1 3⁄8 0.848 0.808 0.687 0.667 ... ... ... ...
ASME B18.3 - 1 1⁄2 0.926 0.886 0.75 0.73 ... ... ... ...
ASME B18.3 - 1 3⁄4 1.086 1.039 0.875 0.855 ... ... ... ...
ASME B18.3 - 2 1.244 1.193 1 0.98 ... ... ... ...
  • All dimensions are in inches.
  • The cup point types shown are those available from various manufacturers.

ASME Material Specifications

ASTM A193/A193M Bolting, Stud Bolts, Screws
ASTM A320/A320M Bolting, Stud Bolts, Screws
ASTM A354 Bolts
ASTM A449 Hex Cap Screws, Bolts, Studs
ASTM A453/A453M Bolting, Stud Bolts, Screws, Nuts
ASTM A574/A574M Standard Specification for Alloy Steel Socket Head Cap Screws
ASTM A1014/A1014M UNS N07718 Bolting, Stud Bolts, Screws, Nuts
ASTM A1082/A1082M Bolting, Stud Bolts, Screws, Nuts
ASTM F1554 Anchor Bolts, Anchor Rods
ASTM F2882 Stud Bolts, Screws, Threaded Rod
ASTM F3042 Socket Set, Square Head Slotted Headless Screw
ASTM F3125/F3125M Heavy Hex Bolts, Screws, Studs
ASTM F468/F468M Bolting, Stud Bolts, Screws
ASTM F593 Bolting, Stud Bolts, Screws
ASTM F738/F738M Stud Bolts, Screws
ASTM F835/F835M Standard Specification for Alloy Steel Socket Button and Flat Countersunk Head Cap Screws
ASTM F837/F837M Standard Specification for Stainless Steel Socket Head Cap Screws
ASTM F880/F880M Standard Specification for Stainless Steel Socket Set Screws
ASTM F901 Aluminium Transmission Tower Bolts
ASTM F912/912M Standard Specification for Alloy Steel Socket Set Screws