Inspection Gaging - Hole Preparation & Installation Inspection Methods

Hole Preparation

Fastener
Diameter

Interference fit
hole size

Transition
fit
hole size

Clearance fit
hole size

100° Countersink
(A) Diameter
GPS8SC

100° Countersink
(A) Diameter
GPS6SC

100° Countersink
(A) Diameter GPS4SC

5/32 (05)

.1595 /.1625

.1610 /.1640

.1635 /.1665

.322 /.326

.288/.283
.255/.251

3/16 (06)

.1845 /.1875

.1870 /.1900

.1895 /.1925

.383 /.377

.349/.344

.303/.298

1/4 (08)

.2445 /.2475

.2470 /.2500

.2495 /.2525

.510 /.503

.472/.467
.403/.398

5/16 (10)

.3070 /.3100

.3090 /.3130

.3120 /.3150

.637 /.630

.560/.553

None

3/8 (12)

.3695 /.3735

.3710 /.3750

.3745 /.3775

.765 /.758

.690/.682
none




Installation Inspection

Pin Position / Swage Gage Numbers

Fastener Dia. & Gage Number

5/32 (05)    HG106-05

3/16 (06)   HG106-06

1/4 (08)    HG106-08

5/16 (10)    HG106-10

3/8 (12)    HG106-12