Nominal Screw Size or Basic Screw Diameter [Notes (1), (2), (3)] | Type I | Type II | Type III | Type VI | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Recess Dia., M, Ref. | Driver Size | Recess Penetration Gaging Depth, P | Recess Dia., Min. | Driver Size | Recess Penetration Gaging Depth, P | Across Flats, M, Ref. | Driver Size (4) | Recess Penetration Gaging Depth, P [Note (5)] | Recess Dia., Min. | Driver Size | Recess Penetration Gaging Depth, P | Falla way | ||||||
Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | ||||||||||
#0 | 0.060 | 0.062 | 0 | 0.036 | 0.020 | 0.062 | 0 | 0.037 | 0.021 | ... | ... | ... | ... | ... | ... | ... | ... | ... |
#1 | 0.073 | 0.070 | 0 | 0.044 | 0.028 | 0.070 | 0 | 0.045 | 0.029 | ... | . .. | . .. | . .. | 0.058 | T5 | 0.017 | 0.012 | 0.010 |
#2 | 0.086 | 0.096 | 1 | 0.056 | 0.040 | 0.096 | 1 | 0.053 | 0.037 | 0.050 | 00 | 0.033 | 0.028 | 0.069 | T6 | 0.022 | 0.017 | 0.014 |
#3 | 0.099 | 0.100 | 1 | 0.061 | 0.045 | 0.100 | 1 | 0.058 | 0.042 | 0.070 | 0 | 0.038 | 0.028 | 0.094 | T8 | 0.025 | 0.020 | 0.019 |
#4 | 0.112 | 0.122 | 1 | 0.082 | 0.066 | 0.122 | 1 | 0.079 | 0.063 | 0.07 | 0 | 0.038 | 0.028 | 0.094 | T8 | 0.033 | 0.028 | 0.019 |
#5 | 0.125 | 0.148 | 2 | 0.075 | 0.052 | 0.148 | 2 | 0.071 | 0.053 | 0.091 | 1S | 0.0 55 | 0.040 | 0.111 | T10 | 0.045 | 0.035 | 0.022 |
#6 | 0.138 | 0.168 | 2 | 0.095 | 0.072 | 0.168 | 2 | 0.091 | 0.073 | 0.091 | 1S | 0.055 | 0.040 | 0.111 | TlO | 0.045 | 0.035 | 0.022 |
#7 | 0.151 | 0.176 | 2 | 0.103 | 0.080 | 0.176 | 2 | 0.099 | 0.081 | 0.091 | 1R | 0.065 | 0.050 | 0.132 | T15 | 0.045 | 0.035 | 0.022 |
#8 | 0.164 | 0.182 | 2 | 0.110 | 0.087 | 0.182 | 2 | 0.107 | 0.089 | 0.112 | 2S | 0.063 | 0.048 | 0.132 | T15 | 0.051 | 0.040 | 0.026 |
#10 | 0.190 | 0.198 | 2 | 0.125 | 0.102 | 0.198 | 2 | 0.122 | 0.104 | 0.112 | 2R | 0.075 | 0.060 | 0.155 | T20 | 0.065 | 0.050 | 0.031 |
#12 | 0.216 | 0.262 | 3 | 0.139 | 0.116 | 0.262 | 3 | 0.136 | 0.118 | 0.133 | 3R | 0.095 | 0.080 | 0. 178 | T2 5 | 0.070 | 0.055 | 0.036 |
#14 | 0.242 | 0.276 | 3 | 0.154 | 0.131 | 0.276 | 3 | 0.151 | 0.133 | 0.133 | 3R | 0.095 | 0.080 | 0.200 | T27 | 0.080 | 0.065 | 0.040 |
1/4" | 0.250 | 0.276 | 3 | 0.154 | 0.131 | 0.276 | 3 | 0.151 | 0.133 | 0.133 | 3R | 0.095 | 0.080 | 0.200 | T27 | 0.090 | 0.075 | 0.04 |
16" | 0.268 | 0.296 | 3 | 0.174 | 0.151 | 0.296 | 3 | 0.171 | 0.153 | 0.133 | 3R | 0.095 | 0.080 | 0. 221 | T30 | 0.070 | 0.055 | 0.042 |
18" | 0.294 | 0.358 | 4 | 0.196 | 0.174 | 0.358 | 4 | 0.193 | 0.175 | 0.191 | 4R | 0.100 | 0.085 | 0. 221 | T30 | 0.090 | 0.075 | 0.042 |
5/16" | 0.313 | 0.358 | 4 | 0.196 | 0.174 | 0.358 | 4 | 0.193 | 0.175 | 0.191 | 4R | 0.100 | 0.085 | 0. 266 | T40 | 0.105 | 0.087 | 0.047 |
20" | 0.320 | 0.372 | 4 | 0.210 | 0.188 | 0.372 | 4 | 0.206 | 0.188 | 0.191 | 4R | 0.100 | 0.085 | 0.266 | T40 | 0.115 | 0.095 | 0.047 |
24" | 0.372 | 0.386 | 4 | 0.225 | 0.203 | 0.386 | 4 | 0.222 | 0. 204 | 0.191 | 4R | 0.100 | 0.085 | 0.266 | T40 | 0.125 | 0.105 | 0.047 |
3/8" | 0.375 | 0.386 | 4 | 0. 225 | 0.203 | 0.386 | 4 | 0.222 | 0.204 | 0.191 | 4R | 0.100 | 0.085 | 0. 266 | T40 | 0.135 | 0.115 | 0.047 |
7/16" | 0.438 | 0.402 | 4 | 0.241 | 0.219 | 0.402 | 4 | 0.238 | 0.220 | .. . | ... | . .. | . .. | 0.352 | T50 | 0.125 | 0.105 | 0.062 |
1/2" | 0.500 | 0.4 18 | 4 | 0. 256 | 0.234 | 0.418 | 4 | 0.253 | 0.235 | ... | . . . | . .. | . .. | 0.352 | T50 | 0.135 | 0.120 | 0.062 |
9/16" | 0.563 | 0.443 | 4 | 0.280 | 0.258 | 0.440 | 4 | 0.276 | 0.258 | ... | . . . | . .. | . .. | 0.446 | T55 | 0.160 | 0.140 | 0.078 |
5/8" | 0.625 | 0.565 | 5 | 0.309 | 0.283 | 0.566 | 5 | 0.307 | 0.286 | ... | ... | . .. | . .. | 0.446 | T55 | 0.160 | 0.140 | 0.078 |
3/4" | 0.750 | 0.628 | 5 | 0.373 | 0.347 | 0.630 | 5 | 0.372 | 0.351 | .. . | . .. | . . . | . .. | 0.529 | T60 | 0.230 | 0.205 | 0.093 |
Nominal Size or Basic Screw Diameter [Note (1)] | Head Diameter, A | Head Height, H [Note (2)] | Slot Width, J | Slot Depth, T | Protrusion Above Gaging Diameter, F [Note (3)] | Gaging Diameter, G [Note {3)] | |||||
---|---|---|---|---|---|---|---|---|---|---|---|
Max. | Min. | Ref. | Max. | Min. | Max. | Min. | Max. | Min. | |||
#0000 | 0.0210 | 0.040 | 0.035 | 0.009 | 0.008 | 0.005 | 0.008 | 0.004 | [Note (4)] | [Note (4)] | [Note (4)) |
#000 | 0.0340 | 0.060 | 0.055 | 0.014 | 0.012 | 0.008 | 0.011 | 0.007 | [Note (4)] | [Note (4)] | [Note (4)] |
#00 | 0.0470 | 0.087 | 0.080 | 0.020 | 0.017 | 0.010 | 0.013 | 0.008 | [Note (4)] | [Note (4)] | [Note (4)) |
#0 | 0.0600 | 0.112 | 0.095 | 0.026 | 0.023 | 0.016 | 0.013 | 0.008 | 0.020 | 0.012 | 0.074 |
#1 | 0.0730 | 0.137 | 0.118 | 0.031 | 0.026 | 0.019 | 0.016 | 0.010 | 0.021 | 0.013 | 0.098 |
#2 | 0.0860 | 0.162 | 0.142 | 0.037 | 0.031 | 0.023 | 0.019 | 0.012 | 0.022 | 0.014 | 0.121 |
#3 | 0.0990 | 0.187 | 0.165 | 0.043 | 0.035 | 0.027 | 0.022 | 0.014 | 0.024 | 0.015 | 0.144 |
#4 | 0.1120 | 0.212 | 0.188 | 0.049 | 0.039 | 0.031 | 0.024 | 0.017 | 0.025 | 0.016 | 0.167 |
#6 | 0.1380 | 0.262 | 0.235 | 0.060 | 0.048 | 0.039 | 0.030 | 0.022 | 0.028 | 0.017 | 0.214 |
#8 | 0.1640 | 0.312 | 0.282 | 0.072 | 0.054 | 0.045 | 0.036 | 0.027 | 0.031 | 0.019 | 0.261 |
#10 | 0.1900 | 0.362 | 0.329 | 0.083 | 0.060 | 0.050 | 0.042 | 0.031 | 0.034 | 0.021 | 0.307 |
1/4" | 0.2500 | 0.477 | 0.437 | 0.110 | 0.075 | 0.064 | 0.055 | 0.042 | 0.040 | 0.025 | 0.415 |
5/16" | 0.3125 | 0.597 | 0.550 | 0.138 | 0.084 | 0.072 | 0.069 | 0.053 | 0.047 | 0.030 | 0.526 |
3/8" | 0.3750 | 0.717 | 0.662 | 0.165 | 0.094 | 0.081 | 0.083 | 0.065 | 0.053 | 0.034 | 0.638 |