Self Drilling Screws
Self drilling screws are a type of self-tapping screw that includes a drill points. Unlike other self tapping screws such as thread cutting and thread rolling, a self drilling screw doesn’t require a pre-drilled hole. This is because the tip of a self drilling screw has a point similar to the point of a drill to create a hole and mate objects together in one operation.
Our self drilling fasteners can be customized to your application and industry. Please review and download our self drilling screw size charts below.
Hex Head
Hex Washer Head
Machine Screws
Tapping Screws
Self Drilling Screws
| Nominal Size |
A | W | H | F | U | J | T | ||||||
| Width Across Flats |
Width Across Corners |
Height of Head |
Diameter of Washer |
Thickness of Washer |
Width of Slot |
Depth of Slot |
|||||||
| Max. | Min. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | |
| 4 6 7 8 10 12 14 1/4 5/16 3/8 |
.187 .250 .250 .250 .312 .312 .438 .375 .500 .562 |
.181 .244 .244 .244 .305 .305 .428 .367 .489 .551 |
.202 .272 .272 .272 .340 .340 .409 .409 .545 .614 |
.060 .093 .093 .110 .120 .155 .190 .190 .230 .295 |
.049 .080 .080 .096 .105 .139 .172 .172 .208 .270 |
.243 .328 .328 .348 .414 .432 .520 .520 .676 .780 |
.225 .302 .302 .322 .384 .398 .480 .480 .624 .720 |
.019 .025 .029 .031 .031 .039 .050 .050 .055 .063 |
.011 .015 .017 .019 .019 .022 .030 .030 .035 .037 |
.039 .048 .048 .054 .060 .067 .075 .075 .084 .094 |
.031 .039 .039 .045 .050 .056 .064 .064 .072 .081 |
.042 .053 .062 .074 .080 .103 .111 .111 .134 .168 |
.025 .033 .040 .052 .057 .077 .083 .083 100 .131 |
Pan Head
Machine Screws
Tapping Screws
Self Drilling Screws
| Nominal Size |
A | H | H1 | J | T | M | G | N | Phillips Driver Size |
|||||||
| Head Diameter | Height of Head | Width of Slot | Depth of Slot | Dimensions of Recess | ||||||||||||
| Slotted | Recessed | Diameter | Depth | Width | ||||||||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | |||
| 2 3 4 5 6 7 8 10 12 1/4 5/16 3/8 |
.167 .193 .219 .245 .270 .296 .322 .373 .425 .492 .615 .740 |
.155 .180 .205 .231 .256 .281 .306 .357 .407 .473 .594 .716 |
.053 .060 .068 .075 .082 .089 .096 .110 .125 .144 .178 .212 |
.045 .051 .058 .065 .072 .079 .085 .099 .112 .130 .162 .195 |
.062 .071 .080 .089 .097 .106 .115 .133 .151 .175 .218 .261 |
.053 .062 .070 .079 .087 .096 .105 .122 .139 .162 .203 .244 |
.031 .035 .039 .043 .048 .048 .054 .060 .067 .075 .084 .094 |
.023 .027 .031 .035 .039 .039 .045 .050 .056 .064 .072 .081 |
.031 .036 .040 .045 .050 .054 .058 .068 .077 .087 .106 .124 |
.022 .026 .030 .034 .037 .041 .045 .053 .061 .070 .085 .100 |
.104 .112 .122 .158 .166 .176 .182 .199 .259 .281 .350 .389 |
.091 .099 .109 .145 .153 .163 .169 .186 .246 .268 .337 .376 |
.059 .068 .078 .083 .091 .100 .108 .124 .141 .161 .193 .233 |
.017 .019 .019 .028 .028 .029 .030 .031 .034 .036 .169 .210 |
1 1 1 2 2 2 2 2 3 3 4 4 |
|
Wafer Head
Self Drilling Screws
| Size | A | H | R | I | ||||
| Head Diameter | Head Hgt. | Recess Diameter | Recess Depth | |||||
| Max. | Min. | Max. | Min. | Max. | Min. | Max | Min. | |
| 10 | .480 | .450 | .055 | .045 | .222 | .208 | .142 | .137 |
Self-Drilling Screws
| Nominal Size or Basic Screw Diameter |
Threads Per Inch |
T | t | P | |||||
| Major Diameter | Minor Diameter | Protrusion Allowance |
|||||||
| Max. | Min. | Max. | Min. | #2 Pt. | #3 Pt | ||||
|
20 | 0.139 | 0.135 | 0.104 | 0.099 | 0.190 | — | ||
|
18 | 0.166 | 0.161 | 0.122 | 0.116 | 0.211 | — | ||
|
16 | 0.189 | 0.183 | 0.141 | 0.135 | 0.235 | 0.300 | ||
|
14 | 0.215 | 0.209 | 0.164 | 0.157 | — | 0.353 | ||
|
14 | 0.246 | 0.240 | 0.192 | 0.185 | — | 0.393 | ||