powercoil.com.au wire thread insert system

®
*
S
T
Q
nom.
Ø A
Ø C eff.
Ø B min.
Ø E min.
Ø D eff.
Optimum Thread
performance with
Wire Thread Inserts
is achieved when
the inserts are
installed 1/2 to 1
pitch below the
surface of the
Tapped Hole. This
means that the
actual length of an
installed insert is
equal to dimension
DL less 1/2 to 1
pitch. Dimensions
AL and CL allow for
tap end clearance
of finishing Taps.
When using
Bottoming and
Spiral Flute Taps
these dimensions
maybe reduced by
an amount equal to
2 thread pitches.
Any counterbore
depths must be
added to these
dimensions.
SIZE
inch
BA
6BA
5BA
4BA
3BA
2BA
1BA
0BA
SIZE
inch
BSC
3/16 X 32
1/4 X 26
5/16 X 26
3/8 X 26
7/16 X 26
1/2 X 26
9/16 X 26
5/8 X 26
3/4 X 26
1 X 24
Drill
mm inch
A max/min
inch
B
inch
C (Normal)
inch
D (Normal)
inch
2.90 #33 0.116 / 0.113 0.134 0.1252 / 0.1226 0.1014 / 0.0976 0.0850 0.14 / 0.15
3.40 #29 0.135 / 0.129 0.152 0.1426 / 0.1399 0.1159 / 0.1120 0.0980 0.15 / 0.17
3.80 #25 0.152 / 0.147 0.171 0.1605 / 0.1574 0.1305 / 0.1262 0.1106 0.17 / 0.19
4.30 11/64 0.171 / 0.166 0.194 0.1821 / 0.1786 0.1488 / 0.1441 0.1268 0.20 / 0.21
4.90 #10 0.196 / 0.191 0.221 0.2079 / 0.2042 0.1709/ 0.1659 0.1468 0.22 / 0.24
5.50 7/32 0.220 / 0.213 0.249 0.2342 / 0.2299 0.1929 / 0.1874 0.1661 0.25 / 0.27
6.20 C 0.246 / 0.241 0.281 0.2645 / 0.2598 0.2185 / 0.2126 0.1890 0.28 / 0.31
Drill
mm inch
A max/min
inch
B
inch
C (Normal)
inch
D (Medium)
inch
E
inch
FC min/max
inch
5.10 13/64 0.205 / 0.195 0.232 0.2112 / 0.2136 0.1738 / 0.1709 0.1543 0.23 / 0.26
6.60 17/64 0.270 / 0.258 0.304 0.2790 / 0.2817 0.2328 / 0.2295 0.2090 0.31 / 0.34
8.00 5/16 0.332 / 0.320 0.367 0.3415 / 0.3444 0.2965 / 0.2920 0.2715 0.37 / 0.41
9.80 25/64 0.395 / 0.383 0.429 0.4040 / 0.4070 0.3583 / 0.3545 0.3340 0.43 / 0.48
11.10 7/16 0.457 / 0.446 0.492 0.4665 / 0.4697 0.4210 / 0.4170 0.3965 0.50 / 0.55
12.70 1/2 0.520 / 0.508 0.554 0.5290 / 0.5323 0.4837 / 0.4795 0.4590 0.56 / 0.61
14.75 37/64 0.582 / 0.571 0.617 0.5915 / 0.5945 0.5464 / 0.5420 0.5215 0.62 / 0.68
16.30 41/64 0.645 / 0.633 0.679 0.6540 / 0.6575 0.6090 / 0.6045 0.5840 0.69 / 0.75
19.50 49/64 0.769 / 0.758 0.804 0.7790 / 0.7827 0.7343 / 0.7295 0.7090 0.81 / 0.89
25.75 1.1/64 1.020 / 1.009 1.059 1.0314 / 1.0355 0.9828 / 0.9778 0.9556 1.07 / 1.17
E
inch
FC min/max
inch
SIZE
inch
UN-8 PITCH
1.1/8 X 8
1.1/4 X 8
1.3/8 X 8
1.1/2 X 8
1.5/8 X 8
1.3/4 X 8
1.7/8 X 8
2 X 8
Drill
mm inch
A max/min
inch
B
inch
C (3B)
inch
Tap (Std)
8 Pitch
D (2B) min/max
inch
FC min/max
inch
28.50 1.1/8 1.155 / 1.130 1.261 1.1757 / 1.1688 1.1/4 1.0528 / 1.0438 1.25 / 1.30
32.00 1.1/4 1.280 / 1.255 1.386 1.3008 / 1.2938 1.3/8 1.1780 / 1.1688 1.39 / 1.43
35.00 1.3/8 1.405 / 1.380 1.511 1.4259 / 1.4188 1.1/2 1.3031 / 1.2938 1.52 / 1.57
38.00 1.1/2 1.530 / 1.505 1.636 1.5510 / 1.5438 1.5/8 1.4283 / 1.4188 1.65 / 1.69
41.00 1.5/8 1.655 / 1.630 1.761 1.6762 / 1.6688 1.3/4 1.5535 / 1.5438 1.78 / 1.90
44.50 1.3/4 1.780 / 1.755 1.886 1.8013 / 1.7938 1.7/8 1.6786 / 1.6688 1.90 / 2.04
47.50 1.7/8 1.905 / 1.880 2.011 1.9264 / 1.9188 2 1.8038 / 1.7938 2.03 / 2.16
50.80 2 2.030 / 2.005 2.136 2.0515 / 2.0438 2.1/8 1.9289 / 1.9188 2.16 / 2.28
®
86
wire thread insert system
powercoil.com.au