Inch Standard Counterbore Rev

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Inch Standard Counterbore Rev INCH STANDARD COUNTERBORE REV. F 06/02/2005 H H' D d D' d' SCREW SCREW CAP HEAD CAP HEAD SOCKET CLEARANCE C'BORE CLEARANCE C'BORE C'BORE SCREW SIZE DIA. DIA. HEIGHT SIZE DIA. DIA. DIA. DIA. DEPTH SIZE d (MAX) (MAX) (CLOSE) (CLOSE) (FREE) (FREE) H' D H d' D' d' D' # 2 0.086 0.140 0.086 5/64 3/32 0.094 0.156 #36 0.107 0.161 0.105 # 2 # 4 0.112 0.183 0.112 3/32 1/8 0.125 0.204 #27 0.144 0.220 0.135 # 4 # 6 0.138 0.226 0.138 7/64 #23 0.154 0.246 #18 0.170 0.262 0.165 # 6 # 8 0.164 0.270 0.164 9/64 #15 0.180 0.290 #10 0.194 0.306 0.190 # 8 # 10 0.190 0.313 0.190 5/32 #5 0.206 0.332 #2 0.221 0.348 0.215 # 10 1/4 0.250 0.375 0.250 3/16 17/64 0.266 0.400 9/32 0.281 0.416 0.275 1/4 5/16 0.313 0.469 0.313 1/4 21/64 0.328 0.493 11/32 0.344 0.509 0.340 5/16 3/8 0.375 0.563 0.375 5/16 25/64 0.391 0.590 13/32 0.406 0.606 0.405 3/8 7/16 0.438 0.656 0.438 3/8 29/64 0.453 0.681 15/32 0.469 0.697 0.470 7/16 1/2 0.500 0.750 0.500 3/8 33/64 0.516 0.775 17/32 0.531 0.791 0.535 1/2 5/8 0.625 0.938 0.625 1/2 41/64 0.641 0.963 21/32 0.656 1.000 0.665 5/8 3/4 0.750 1.125 0.750 5/8 49/64 0.766 1.151 25/32 0.781 1.171 0.790 3/4 7/8 0.875 1.313 0.875 3/4 57/64 0.891 1.340 29/32 0.906 1.359 0.915 7/8 1 1.000 1.500 1.000 3/4 1-1/64 1.016 1.528 1-1/32 1.031 1.546 1.045 1 TOLERANCES +/- FREE CLOSE CLEARANCE DIAMETER 0.005 0.005 COUNTERBORE DIAMETER 0.010 0.005 COUNTERBORE DEPTH 0.010 0.010 FREE SHOULD BE USED UNLESS CLOSE IS REQUIRED Printed copies of Electroimpact standards are for reference only and are not subject to revision control. METRIC COUNTERBORE REV. H 06/02/2005 H H' D d D' d' SCREW SCREW CAP HEAD CAP HEAD SOCKET CLEARANCE C'BORE CLEARANCE C'BORE C'BORE SCREW SIZE DIA. DIA. (MAX) HEIGHT (MAX) SIZE DIA. (CLOSE) DIA. (CLOSE) DIA. (FREE) DIA. (FREE) DEPTH SIZE d D H d' D' d' D' H' in mm in mm in mm in mm in mm in mm in mm in M 2 0.079 3.8 0.150 2.0 0.079 1.5 mm 2.2 0.087 4.0 0.157 2.50 0.098 4.30 0.169 2.5 0.098 M 2 M 2.5 0.098 4.5 0.177 2.5 0.098 2.0 mm 2.7 0.106 4.7 0.185 3.00 0.118 5.00 0.197 3.0 0.118 M 2.5 M 3 0.118 5.5 0.217 3.0 0.118 2.5 mm 3.5 0.138 6.0 0.236 3.75 0.148 6.25 0.246 3.5 0.138 M 3 M 4 0.157 7.0 0.276 4.0 0.157 3.0 mm 4.5 0.177 7.5 0.295 4.90 0.193 7.90 0.311 4.5 0.177 M 4 M 5 0.197 8.5 0.335 5.0 0.197 4.0 mm 5.5 0.217 9.0 0.354 5.90 0.232 9.40 0.370 5.5 0.217 M 5 M 6 0.236 10.0 0.394 6.0 0.236 5.0 mm 6.5 0.256 10.5 0.413 7.00 0.276 11.00 0.433 7.0 0.276 M 6 M 8 0.315 13.0 0.512 8.0 0.315 6.0 mm 8.5 0.335 13.5 0.531 9.20 0.362 14.20 0.559 9.0 0.354 M 8 M 10 0.394 16.0 0.630 10.0 0.394 8.0 mm 10.5 0.413 16.5 0.650 11.40 0.449 17.40 0.685 11.0 0.433 M 10 M 12 0.472 18.0 0.709 12.0 0.472 10.0 mm 12.5 0.492 18.5 0.728 13.50 0.531 19.50 0.768 13.0 0.512 M 12 M 14 0.551 21.0 0.827 14.0 0.551 7.000 14.5 0.571 21.5 0.846 15.70 0.618 22.70 0.894 15.0 0.591 M 14 M 16 0.630 24.0 0.945 16.0 0.630 14.0 mm 17.0 0.669 25.0 0.984 18.00 0.709 26.00 1.024 18.0 0.709 M 16 M 20 0.787 30.0 1.181 20.0 0.787 17.0 mm 21.0 0.827 31.0 1.220 22.50 0.886 32.50 1.280 22.0 0.866 M 20 M 24 0.945 36.0 1.417 24.0 0.945 19.0 mm 25.0 0.984 37.0 1.457 26.70 1.051 38.70 1.524 26.0 1.024 M 24 M 30 1.181 45.0 1.772 30.0 1.181 22.0 mm 31.0 1.220 46.0 1.811 33.00 1.299 48.00 1.890 32.0 1.260 M 30 NOTE: " FREE SIZES " AND M2.0 AND M2.5 THREAD PITCHES SHOULD ALWAYS BE SPECIFIED, ARE NOT McMASTER CARR STANDARD CUTTING TOOLS BUT WHEN METRIC THREADS ARE SPECIFIED WITHOUT A PITCH, FREE SHOULD BE USED UNLESS CLOSE IS REQUIRED THE FOLLOWING PITCHES ARE TO BE USED: TOLERANCES +/- M 2 X .40 M 6 X 1.0 M 16 X 2.0 FREE CLOSE M 2.5 X .45 M 8 X 1.25 M 20 X 2.5 CLEARANCE DIAMETER 0.005 0.005 M 3 X .50 M 10 X 1.5 M 24 X 3.0 COUNTERBORE DIAMETER 0.010 0.005 M 4 X .70 M 12 X 1.75 M 30 X 3.5 COUNTERBORE DEPTH 0.010 0.010 M 5 X .80 M 14 X 2.0 11/4/2015 Printed copies of Electroimpact standards are for reference only and are not subject to revision control. INCH STANDARD COUNTERSINK REV. E 06/02/2005 H D d 82° D' d' SCREW SCREW FLAT HEAD FLAT HEAD SOCKET C'SINK CLEARANCE SCREW SIZE DIA. DIA. HEIGHT SIZE DIA. DIA. d' SIZE d D (max) H (max) D' CLOSE # 2 0.086 0.197 0.064 0.050 0.214 3/32 0.094 # 2 # 4 0.112 0.255 0.083 1/16 0.272 1/8 0.125 # 4 # 6 0.138 0.307 0.097 5/64 0.324 #23 0.154 # 6 # 8 0.164 0.359 0.112 3/32 0.376 #15 0.180 # 8 # 10 0.190 0.411 0.127 1/8 0.428 #5 0.206 # 10 1/4 0.250 0.531 0.161 5/32 0.548 17/64 0.266 1/4 5/16 0.313 0.656 0.198 3/16 0.673 21/64 0.328 5/16 3/8 0.375 0.781 0.234 7/32 0.798 25/64 0.391 3/8 7/16 0.438 0.844 0.234 1/4 0.861 29/64 0.453 7/16 1/2 0.500 0.938 0.251 5/16 0.955 33/64 0.516 1/2 5/8 0.625 1.188 0.324 3/8 1.205 41/64 0.641 5/8 3/4 0.750 1.438 0.396 1/2 1.455 49/64 0.766 3/4 7/8 0.875 1.688 0.468 9/16 1.705 57/64 0.891 7/8 1 1.000 1.938 0.540 5/8 1.955 1-1/64 1.016 1 COUNTERSINK DIAMETERS ARE BASED ON THE THEORETICAL MAXIMUM HEAD DIAMETER AT A DEPTH OF .005 TO .015 AND AN ANGLE OF 82 DEGREES. ACTUAL DEPTH MAY VARY DEPENDING ON ACTUAL HEAD DIAMETER AND ANGLE COUNTERSINK DIAMETER TOLERANCES ARE +/- .010 COUNTERSINK ANGLE TOLERANCES ARE +/- 2 DEGREES FREE SHOULD BE USED UNLESS CLOSE IS REQUIRED Printed copies of Electroimpact standards are for reference only and are not subject to revision control. METRIC COUNTERSINK REV. H 06/02/2005 H D d 90° D' d' SCREW SCREW FLAT HEAD FLAT HEAD SOCKET COUNTERSINK CLEARANCE SCREW SIZE DIA. DIA. HEIGHT SIZE DIAMETER DIA. d' SIZE d D (max) H (max) D' CLOSE in mm in mm in mm in mm in M 2 0.079 4.2 0.165 1.1 0.043 1.3 mm 4.7 0.185 2.2 0.087 M 2 M 2.5 0.098 5.2 0.207 1.4 0.054 1.5 mm 5.8 0.227 2.7 0.106 M 2.5 M 3 0.118 6.4 0.252 1.7 0.067 2 mm 6.9 0.272 3.5 0.138 M 3 M 4 0.157 8.6 0.339 2.3 0.091 2.5 mm 9.4 0.369 4.5 0.177 M 4 M 5 0.197 10.6 0.417 2.8 0.110 3 mm 11.6 0.457 5.5 0.217 M 5 M 6 0.236 12.6 0.496 3.3 0.130 4 mm 13.9 0.546 6.50 0.256 M 6 M 8 0.315 16.8 0.661 4.4 0.173 5 mm 18.3 0.721 8.5 0.335 M 8 M 10 0.394 21.0 0.827 5.5 0.217 6 mm 22.8 0.897 10.5 0.413 M 10 M 12 0.472 25.0 0.984 6.5 0.256 8 mm 27.0 1.064 12.5 0.492 M 12 M 14 0.551 28.0 1.102 7.0 0.276 10 mm 30.4 1.197 14.5 0.571 M 14 COUNTERSINK DIAMETERS ARE BASED ON THE THEORETICAL MAXIMUM HEAD DIAMETER AT A DEPTH OF .005 TO .015 AND AN ANGLE OF 90 DEGREES.
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