Pan Head Screw

The following is a recommended mechanical tolerance and hole sizes for standard ANSI Pan head fasteners.

The following are medium fits.  These fits have been calculated using the Fixed Fastener case and are line to line in worst case misalignment and size departure.

SIZE HEAD
HEIGHT
TAPPED HOLE
POSITION TOL
CLEARANCE HOLE
DIA. TOL. LIMITS
HOLE POSITIONAL TOLERANCE
HEAD DIAMETER COUNTERBORE DIA.
TOLERANCE LIMITS
.060-80
#0
.038 .010 .081
.076
.006 .116 .178
.162
.086-56/64
#2
.053 .012 .112
.105
.007 .167 .232
.210
.112-40/48
#4
.068 .016 .150
.142
.014 .219 .295
.273
.138-32/40
#6
.082 .022 .185
.174
.014 .270 .354
.330
.164-32/36
#8
.096 .024 .214
.202
.014 .322 .406
.382
.190-24/32
#10
.110 .028 .252
.236
.018 .373 .465
.441
.250-20/28 .144 .028 .312
.296
.018 .492 .562
.538
.3125-18/24 .178 .030 .381
.365
.022 .615 .689
.672
.375-16/24 .212 .030 .443
.427
.022 .740 .816
.797


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