Recommended Hole Preparation

Fastener
Diameter

Recommended
hole size
all head styles

100° Countersink
LHPL8SC
(A) Diameter

100° Countersink LHPL7SC
(A) Diameter

130° Countersink
LHPL9SC
(A) Diameter

5/32 (05)

.1635 /.1670

.331/.341

.292/.300

.331/.339

3/16 (06)

.1895 /.1930

.386/.396

.357/.365

.386/.394

1/4 (08)

.2495 /.2530

.507/.517

.480/.488

.507/.515

5/16 (10)

.3120 /.3170

.635/.645

.568/.578

.635/.645

3/8 (12)

.3745 /.3790

.762/.772

.698/.708

.762/.772






Gage number 112731 is available for LHP grip thickness. This gage measures in 1/16-inch increments plus overlap.

Gage number 118947 is available for LHP grip thickness. This gage measures in 1/16-inch increments.