Machinery's Handbook, 31st Edition
MACHINE SCREWS AND NUTS 1781 Table 8. American National Standard Slotted Fillister and Slotted Drilled Fillister Head Machine Screws ANSI/ASME B18.6.3-2013
E See Note 3
E See Note 3
T
F
T
J
J
A
H
H
See Note 2
A
O
L
O
L
SLOTTED FILLISTER HEAD TYPE
Head Side Height, H
Total Head Height, O
Head Dia., A
Slot Width, J
Slot Depth, T
Nominal Size 1 or Basic Screw Dia.
Max.
Min.
Max.
Min.
Max.
Min.
Max Min.
Max.
Min.
0000 000
0.0210 0.0340 0.0470 0.0600 0.0730 0.0860 0.0990 0.1120 0.1250 0.1380 0.1640 0.1900 0.2160 0.2500 0.3125 0.3750 0.4375 0.5000 0.5625 0.6250
.038 .032 .019 .011 .025 .015 .008 .004 .012 .006 .059 .053 .029 .021 .035 .027 .012 .006 .017 .011 .082 .072 .037 .028 .047 .039 .017 .010 .022 .015 .096 .083 .043 .038 .055 .047 .023 .016 .025 .015 .118 .104 .053 .045 .066 .058 .026 .019 .031 .020 .140 .124 .062 .053 .083 .066 .031 .023 .037 .025 .161 .145 .070 .061 .095 .077 .035 .027 .043 .030 .183 .166 .079 .069 .107 .088 .039 .031 .048 .035 .205 .187 .088 .078 .120 .100 .043 .035 .054 .040 .226 .208 .096 .086 .132 .111 .048 .039 .060 .045 .270 .250 .113 .102 .156 .133 .054 .045 .071 .054 .313 .292 .130 .118 .180 .156 .060 .050 .083 .064 .357 .334 .148 .134 .205 .178 .067 .056 .094 .074 .414 .389 .170 .155 .237 .207 .075 .064 .109 .087 .518 .490 .211 .194 .295 .262 .084 .072 .137 .110 .622 .590 .253 .233 .355 .315 .094 .081 .164 .133 .625 .589 .265 .242 .368 .321 .094 .081 .170 .135 .750 .710 .297 .273 .412 .362 .106 .091 .190 .151 .812 .768 .336 .308 .466 .410 .118 .102 .214 .172 .875 .827 .375 .345 .521 .461 .133 .116 .240 .193
00
0 1 2 3 4 5 6 8
10 12
1 ∕ 4
5 ∕ 16
3 ∕ 8
7 ∕ 16
1 ∕ 2
9 ∕ 16
5 ∕ 8
3 ∕ 4 0.7500 1.000 .945 .441 .406 .612 .542 .149 .131 .281 .226 SLOTTED DRILLED FILLISTER HEAD TYPE Nominal Size 1 or Basic Screw Dia. Head Dia., A Head Side Height, H Total Head Height, O Slot Width, J Slot Depth, T Drilled Hole Locat., E Drilled Hole. Dia., F Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Basic Basic 2 0.0860 .140 .124 .062 .055 .083 .070 .031 .023 .030 .022 .026 .031 3 0.0990 .161 .145 .070 .064 .095 .082 .035 .027 .034 .026 .030 .037 4 0.1120 .183 .166 .079 .072 .107 .094 .039 .031 .038 .030 .035 .037 5 0.1250 .205 .187 .088 .081 .120 .106 .043 .035 .042 .033 .038 .046 6 0.1380 .226 .208 .096 .089 .132 .118 .048 .039 .045 .035 .043 .046 8 0.1640 .270 .250 .113 .106 .156 .141 .054 .045 .065 .054 .043 .046 10 0.1900 .313 .292 .130 .123 .180 .165 .060 .050 .075 .064 .043 .046 12 0.2160 .357 .334 .148 .139 .205 .188 .067 .056 .087 .074 .053 .046 1 ∕ 4 0.2500 .414 .389 .170 .161 .237 .219 .075 .064 .102 .087 .062 .062 5 ∕ 16 0.3125 .518 .490 .211 .201 .295 .276 .084 .072 .130 .110 .078 .070 3 ∕ 8 0.3750 .622 .590 .253 .242 .355 .333 .094 .081 .154 .134 .094 .070 All dimensions are in inches. 1 Where specifying nominal size in decimals, zeros preceding decimal points and in the fourth decimal place are omitted. 2 Drilled hole shall be approximately perpendicular to the axis of slot and may be permitted to break through bottom of the slot. Edges of the hole shall be free from burrs. 3 A slight rounding of the edges at periphery of head is permissible provided the diameter of the bearing circle is equal to no less than 90 percent of the specified minimum head diameter.
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