CERTIFIED THREAD MEASURING WIRES
60° METRIC
60° INCH
29° ACME
Pitch
Nominal
Price
Threads
Nominal
Price
Threads Nominal
Price
mm
Best Wire
Set of
per
Best Wire
Set of
per
Best Wire
Set of
Diameter
3
Inch (n)
Diameter
3
Inch (n) Diameter
3
mm
G
M
G
P.D.
120
.00481
$76.00
.2
.1155
$76.00
1
.51645
$87.00
100
.00577
76.00
.225
.1299
76.00
1/3
1
.38734
87.00
96
.00601
76.00
.25
.1443
76.00
11/2
.34430
87.00
90
.00642
76.00
.3
.1732
76.00
13/4
.29511
87.00
80
.00722
76.00
.35
.2021
76.00
2
.25823
87.00
W
72
.00802
76.00
.4
.2309
76.00
1/2
2
.20658
87.00
64
.00902
76.00
.45
.2598
76.00
3
.17215
87.00
P.D. =
Pitch Diameter
56
.01031
76.00
.5
.2887
76.00
1/2
3
.14756
70.00
M=
Measurement over wires
50
.01155
76.00
.6
.3464
76.00
W=
Wire diameter
4
.12911
70.00
C=
Constant
48
.01203
48.00
.7
.4041
76.00
1/2
4
.11477
70.00
44
.01312
48.00
.75
.4330
48.00
5
.10329
70.00
C = .86603 x Pitch (inches) -3W
40
.01443
48.00
.8
.4619
48.00
P.D. = M-C
51/2
.09390
70.00
W = .57735 x P
36
.01604
48.00
.9
.5196
48.00
6
.08608
70.00
32
.01804
48.00
1.0
.5774
48.00
Thread Measuring Wires
7
.07378
70.00
30
.01925
48.00
1.25
.7217
48.00
8
.06456
70.00
Tolerance and specifications:
28
.02062
48.00
1.5
.8660
48.00
9
.05738
70.00
· within .000020" of best wire
27
.02138
48.00
1.75
1.0104
48.00
10
.05164
70.00
diameter for specified tpi.
26
.02221
48.00
2.0
1.1547
48.00
12
.04304
70.00
· within .000005" of the calibrated
24
.02406
48.00
2.5
1.4434
48.00
14
.03689
70.00
size provided on label.
22
.02624
48.00
3.0
1.7321
48.00
· have the same diameter
16
.03228
70.00
within .000005".
20
.02887
48.00
3.5
2.0207
48.00
18
.02869
70.00
· roundness within .000010".
18
.03208
48.00
4.0
2.3094
48.00
20
.02582
70.00
· taper does not exceed .000010".
16
.03608
48.00
4.5
2.5981
48.00
LIBRARY SETS
· standard 2" lengths.
14
.04124
48.00
5.0
2.8868
76.00
· minimum hardness of RC 62.5.
29° Acme
13
.04441
48.00
5.5
3.1754
76.00
· surface finish lapped, 1 MU AA.
Set No. 22AB, 22 sizes
12
.04811
48.00
6.0
3.4641
76.00
· traceable to NIST.
(1 to 20 TPI),
1/2
11
.05020
48.00
7.0
4.0415
76.00
· wires meet or exceed Federal
with case
$1671.00
11
.05249
48.00
8.0
4.6188
76.00
specifications ASME/ANSI B1.2
and B1.6M for Grade A Master
10
.05774
48.00
9.0
5.1962
76.00
SPECIAL THREAD
Thread Wires
9
.06415
48.00
10.0
5.7735
76.00
MEASURING WIRES
8
.07217
48.00
Use of best size wires
LIBRARY SETS
+/ .000020"
71/2
.07698
48.00
In measuring screw threads it is
Set No. 23M, 23 sizes
7
.08248
48.00
desirable to use wires which touch the
Above -
(.3m pitch to 6m pitch)
$1351.00
thread at or near the pitch diameter for
6
.09623
48.00
including
Set of 3
with case
the reason that with such "Best Size"
1/2
5
.10497
76.00
.004 - .005"
$145.00
60° Metric
wires the measurement of pitch
5
.11547
76.00
.1016mm-.1270mm
Set No. 30M, 30 sizes
diameter is least effected by an error in
$1871.00
1/2
4
.12830
76.00
(.2m pitch to 10m pitch)
.005-.007"
145.00
the included angle of thread.
with case
4
.14434
76.00
.1270mm-.1778mm
Max.
Best
Min.
1/2
3
.16496
76.00
.007-.010"
110.00
Grand Master Calibration Sets
60°
1.010362p .57735p
.505182p
31/4
.17765
76.00
Supplied in durable corrosion
.1778mm-.2540mm
55°
.82573p
.563692p
.50568p
resistant containers in fitted cases,
3
.19245
76.00
.010"-.135"
110.00
identified by serial numbers with
3/4
2
.20995
76.00
53°-8°
.97828p
.55902p
.54076p
.2540mm-3.429mm
certification of calibration.
21/2
.23094
76.00
.135-.260"
110.00
471/2°
.72889p
.54625p
.49852p
2
.28868
76.00
#20 HSC, 20 sizes (6-36 TPI) $ 805.00
3.429mm-6.604mm
29° Acme
.650013p
.51645p
.487263p
#30 HSC, 30 sizes (5-80 TPI) $1380.00
LIBRARY SETS
.260-.385"
120.00
p=Pitch n=TPI P= 1/n
#34 HSC, 34 sizes (4-80 TPI) $1553.00 60°Inch Set No. 30 HS*
6.604mm-9.779mm
Notes: Maximum and minimum wires
#30 HSC, 30 sizes (.2-10mm) $1610.00 30 sizes (5-80 TPI)
$1578.00
.385-.510"
120.00
should be used which are safely within
with case
9.779mm-12.954mm
#23 HSC, 22 sizes (.3-6mm) $1150.00
the limiting dimensions given by the
Set No. 34 HS 34 sizes
above formulas.
1803.00
.510-.635"
120.00
#22 HSC, 22 sizes (1-20 TPI) $1380.00
(4-80 TPI) with case
Call for information and pricing of special wire
12.954mm-16.129mm
Set No.20 HS*20 sizes
One master for each pitch.
diameters including Whitworth, British
.635-.760"
145.00
(6-36 TPI) with case
937.00
Grand Master Calibration Sets are not
Association, Buttress and worm threads.
Set No. 20 TC 20 sizes
Priced
16.129mm-19.304mm
returnable for credit or cancellation.
Root Diameter Wires:
on
(6-36 TPI) with case
.760-1.010"
145.00
Certificate of Calibration traceable to
(tungsten carbide shop set) Request
60° and 55° threads from 41/2-64 TPI.
NIST included with all sets.
19.304mm-25.654mm
Price per set of 3 wires.
* 71/2 & 22 TPI not included in these sets.
Call for prices.
18
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