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  5. ASME B18.6.2 Slotted Headless Set Screws

ASME B18.6.2 Slotted Headless Set Screws

ASME B18.6.2 Slotted Headless Set Screws

Nominal Sizea Slot Width, J Slot Depth, T Cup and Flat Point Dia., C Dog Point Dia., P Point Length
Dog, Q Half Dog, Q1
Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min.
ASME B18.6.2 - 0 0.06 0.014 0.01 0.02 0.016 0.033 0.027 0.04 0.037 0.032 0.028 0.017 0.013
ASME B18.6.2 - 1 0.073 0.016 0.012 0.02 0.016 0.04 0.033 0.049 0.045 0.04 0.036 0.021 0.017
ASME B18.6.2 - 2 0.086 0.018 0.014 0.025 0.019 0.047 0.039 0.057 0.053 0.046 0.042 0.024 0.02
ASME B18.6.2 - 3 0.099 0.02 0.016 0.028 0.022 0.054 0.045 0.066 0.062 0.052 0.048 0.027 0.023
ASME B18.6.2 - 4 0.112 0.024 0.018 0.031 0.025 0.061 0.051 0.075 0.07 0.058 0.054 0.03 0.026
ASME B18.6.2 - 5 0.125 0.026 0.02 0.036 0.026 0.067 0.057 0.083 0.078 0.063 0.057 0.033 0.027
ASME B18.6.2 - 6 0.138 0.028 0.022 0.04 0.03 0.074 0.064 0.092 0.087 0.073 0.067 0.038 0.032
ASME B18.6.2 - 8 0.164 0.032 0.026 0.046 0.036 0.087 0.076 0.109 0.103 0.083 0.077 0.043 0.037
ASME B18.6.2 - 10 0.19 0.035 0.029 0.053 0.043 0.102 0.088 0.127 0.12 0.095 0.085 0.05 0.04
ASME B18.6.2 - 12 0.216 0.042 0.035 0.061 0.051 0.115 0.101 0.144 0.137 0.115 0.105 0.06 0.05
ASME B18.6.2 - 1⁄4 0.25 0.049 0.041 0.068 0.058 0.132 0.118 0.156 0.149 0.13 0.12 0.068 0.058
ASME B18.6.2 - 5⁄16 0.3125 0.055 0.047 0.083 0.073 0.172 0.156 0.203 0.195 0.161 0.151 0.083 0.073
ASME B18.6.2 - 3⁄8 0.375 0.068 0.06 0.099 0.089 0.212 0.194 0.25 0.241 0.193 0.183 0.099 0.089
ASME B18.6.2 - 7⁄16 0.4375 0.076 0.068 0.114 0.104 0.252 0.232 0.297 0.287 0.224 0.214 0.114 0.104
ASME B18.6.2 - 1⁄2 0.5 0.086 0.076 0.13 0.12 0.291 0.27 0.344 0.334 0.255 0.245 0.13 0.12
ASME B18.6.2 - 9⁄16 0.5625 0.096 0.086 0.146 0.136 0.332 0.309 0.391 0.379 0.287 0.275 0.146 0.134
ASME B18.6.2 - 5⁄8 0.625 0.107 0.097 0.161 0.151 0.371 0.347 0.469 0.456 0.321 0.305 0.164 0.148
ASME B18.6.2 - 3⁄4 0.75 0.134 0.124 0.193 0.183 0.45 0.425 0.562 0.549 0.383 0.367 0.196 0.18
  • All dimensions in inches.
  • These cap screws have been designed and recommended for light fastening applications. They are not suggested for use in critical high-strength applications where socket head cap screws should normally be used.
  • Standard length increments for socket button head cap screws are as follows: 1 ⁄ 16 inch for nominal screw lengths of 1 ⁄ 8 through 1 ⁄ 4 inch, 1 ⁄ 8 inch for nominal screw lengths of 1 ⁄ 4 through 1 inch, and 1 ⁄ 4 inch for nominal screw lengths of 1 inch through 2 inches. Tolerances on lengths are −0.03 inch for lengths up to 1 inch inclusive. For lengths from 1 through 2 inches, inclusive, length tolerances are − 0.04 inch.
  • The thread conforms to the Unified standard, Class 3A, with radius root, UNRC and UNRF.
  • To prevent interference, American National Standard ASME B18.3.4M-1986 gives metric dimensional and general requirements for a lower head profile hexagon socket button head cap screw. Because of its design, wrenchability and other design factors are reduced; therefore, B18.3.4M should be reviewed carefully. Available only in metric sizes and with metric threads. For manufacturing details, including materials, not shown, see American National Standard ASME B18.3-1998