Pan Head Machine Screws: Size Chart & Specifications

 Slotted & Phillips Pan Head Machine Screw Drawing

Pan Head Machine Screws - Slotted & Phillips Drive Size Chart

Nominal Size

 A
 H H1 J T
 M G Phillips Driver Size
Head Dimensions Height of Head Width of Slot Depth of Slot
 Dimensions of Recess
Slotted Recessed Diameter Recess Penetration Gaging Depth
Diameter
0 .116 .104 .039 .031 .044 .036 ..023 .016 .022 .014 .060 .032 .014 0
2 .167 .155 .053 .045 .062 .053 .031 .023 .031 .022 .097 .052 .034 1
3 .193 .180 .060 .051 .071 .062 .035 .027 .036 .026 .105 .061 .043 1
4 .219 .205 .068 .058 .080 .070 .039 .031 .040 .030 .115 .071 .053 1
5 .245 .231 .075 .065 .089 .079 ..043 .035 .045 .034 .152 .072 .046 2
6 .270 .256 .082 .072 .097 .087 ..048 .039 .050 .037 .159 .080 .055 2
8 .322 .306 .096 .085 .115 .105 .054 .045 .058 .045 .175 .097 .071 2
10 .373 .357 .110 .099 .133 .122 .060 .050 .068 .053 .192 .113 .089 2
12 .425 .407 .125 .112 .151 .139 .067 .056 .077 .061 .252 .124 .098 3
1/4 .492 .473 .144 .130 .175 .162 .075 .064 .087 .070 .274 .144 .118 3
5/16 .615 .594 .178 .162 .218 .203 .084 .072 .106 .085 .343 .173 .149 4
3/8 .740 .716 .212 .195 .261 .244 .094 .081 .124 .100 .382 .213 .190 4
1/2 .987 .958 .281 .260 .348 .325 .106 .091 .161 .131 .428 .260 .235 4

 

 Combination Drive Pan Head Machine Screw Drawing

Pan Head Machine Screws - Combination Drive Size Chart

Nominal
Screw Size

 G H J A M T N Recess
Penetration		 Driver Size
Head Dimensions Slot Dimensions Recess Dimensions
Head Diameter
 Head Height Width
 Depth Diameter Depth Recess Width
Max Min Max Min Max Min Max Min Max Min Max Min Min Max Min 
4 .219 .205 .080 .070 .039 .031 .040 .027 .122 .109 .078 .060 .019 .071 .053 1
6 .270 .256 .097 .087 .048 .039 .050 .033 .166 .153  .091 .066 .028 .080 .055 2
8 .322 .306 .115 .105 .054 .045 .058 .041 .182 .169 .108 .082 .030 .097 .071 2
10 .373 .357 .133 .122 .060 .050 .068 .048 .199 .186 .124 .100 .031 .113 .089 2
12 .425 .407 .151 .112 .067 .056 .077 .055 .259 .246 .141 .115 .034 .124 .098 3
1/4 .492 .473 .175 .162 .075 .064 .087 .063 .281 .268 .161 .135 .036 .144 .118 3
5/16 .615 .594 .218 .203 .084 .072 .106 .076 .350 .337 .193 .169 .059 .173 .149 4

 

Square Drive Pan Head Machine Screw Drawing

Pan Head Machine Screws - Square Drive Size Chart

Nominal Size or Basic
Screw Diameter

 A H M T F Driver Size
Head Diameter Head Height Recess
Square		 Recess
Depth		 Recess Penetration
Gaging Depth
Max Min Max Min Ref Ref Max Min
4 .1120 .219 .205 .086 .076 .070 .066 .038 .028 0
6 .1380 .270 .256 .103 .093 .091 .106 .065 .050 1
8 .1640 .322 .306 .120 .110 .112 .127 .075 .060 2
10 .1900 .373 .357 .137 .126 .112 .127 .075 .060 2
12 .2160 .425 .407 .153 .141 .133 .158 .095 .080 3
1/4 .2500 .492 .473 .175 .162 .133 .158 .095 .080 3
5/16 .3125 .615 .594 .218 .203 .191 .194 .100 .085 4
 A square center opening has this type of recess, slightly tapered side walls and a conical bottom.

 

 

 Six Lobe Pan Head Machine Screws Drawing

Pan Head Machine Screws - Six Lobe Drive Size Chart

Screw Size

 D H R G   Driver Size
Head Dimensions Head Dimensions
Head Diameter Head Height Ref Gauge
Penetration
Min

(Fallaway)
Max
Penetration
Max Min Max Min
0 .116 .104 .044 .036 .058 .015 .009 T5
2 .167 .155 .062 .053 .094 .030 .019 T8
3 .193 .180 .071 .062 .094 .033 .019 T8
4 .219 .205 .080 .070 .111 .035 .022 T10
5 .245 .231 .089 .079 .111 .045 .022 T10
6 .270 .256 .097 .087 .132 .045 .026 T15
8 .322 .306 .115 .105 .155 .055 .031 T20
10 .373 .357 .133 .122 .178 .070 .036 T25
12 .425 .407 .151 .139 .200 .070 .040 T27
1/4 .492 .473 .175 .162 .221 .085 .044 T30
5/16 .615 .594 .218 .203 .266 .105 .047 T40
3/8 .740 .716 .261 .244 .312 .130 .055 T45
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