Thread Check Catalog 2023

CERTIFIED THREAD MEASURING WIRES

60 Degree - Inch Nominal Best Wire Diameter G Thread Check Inc. offers a full range of thread measuring wires in inches, metric, Acme and special sizes traceable to NIST which meet or exceed ANSI/ASME B1.2 and ASME B89.1.17-2001. All wire sets are supplied within .000020" of the best wire size. All thread measuring wires are calibrated within .000005" of the size provided on the label. Commonality of the 3 wires is within .000010". Roundness is within .000010". Thread measuring wires are supplied with a minimum hardness of Rc. 62.5. Thread Check Inc. can supply wires and technical support for many modified and special threads including trapezoidal threads and buttress threads. 60 Degree - Metric Nominal Best Wire Diameter G Order Number Price 0.1155 TMW-.20 $139.00 0.1299 TMW-.225 139.00 0.1443 TMW-.25 139.00 0.1732 TMW-.30 139.00 0.2021 TMW-.35 139.00 0.2309 TMW-.40 139.00 0.2598 TMW-.45 139.00 0.2887 TMW-.50 139.00 0.3464 TMW-.60 139.00 0.4041 TMW-.70 139.00 0.433 TMW-.75 95.00 0.4619 TMW-.80 95.00 0.5196 TMW-.90 95.00 0.5774 TMW-1.0 95.00 0.7217 TMW-1.25 95.00 0.866 TMW-1.5 95.00 1.0104 TMW-1.75 95.00 1.1547 TMW-2.0 95.00 1.4434 TMW-2.5 95.00 1.7321 TMW-3.0 95.00 2.0207 TMW-3.5 95.00 2.3094 TMW-4.0 95.00 2.5981 TMW-4.5 95.00 2.8868 TMW-5.0 139.00 3.1754 TMW-5.5 139.00 3.4641 TMW-6.0 139.00 4.0415 TMW-7.0 139.00 4.6188 TMW-8.0 139.00 5.1962 TMW-9.0 139.00 5.7735 TMW-10.0 139.00 Long Form Calibration $30.00 per TPI or pitch size. Order Number Price TMW-120 TMW-100 TMW-96 TMW-90 TMW-80 TMW-72 TMW-64 TMW-56 TMW-50 TMW-48 TMW-44 TMW-40 TMW-36 TMW-32 TMW-30 TMW-28 TMW-27 TMW-26 TMW-24 TMW-22 TMW-20 TMW-18 TMW-16 TMW-14 TMW-13 TMW-12 $139.00 139.00 139.00 139.00 139.00 139.00 139.00 139.00 139.00 TMW-11 1/2 TMW-11 TMW-10 TMW-9 TMW-8 Thread measuring wires are the most universally recognized method of measuring pitch diameter on threaded gages, threaded parts and taps. The pitch diameter is the most important element of a thread that can be measured because it reflects the widest spectrum of possible defects in a threaded part or gage. The pitch diameter is the theoretical diametrical plane which passes through a thread at the point where the width of the thread tooth and groove are equal. The correct pitch diameter size assures that threaded product is within the required specifications for producing interchangeability, assembly and strength. Measuring the pitch diameter of thread gages is critical to controlling and qualifying threaded product.

M

P.D.

W

Use of best size wires In measuring screw threads it is desirable to use wires which touch the thread at or near the pitch diameter for the reason that with such “Best Size” wires the measurement of pitch diameter is least effected by an error in the included angle of thread. • Minimum hardness of RC 62.5 • Surface finish lapped, 1 MU AA • Traceable to NIST • Wires meet or exceed ASME/ANSI B1.2, B1.16M and ASME B89.1.17-2001 American National Standards P.D. = Pitch Diameter M= Measurement over wires W = Wire diameter C=Constant C= .86603 x Pitch (inches) -3W P.D.= M-C W= .57735 x P Thread Measuring Wires Tolerance and specifications: • Within .000020" of best wire diameter for specified tpi • Within .000005" of the calibrated size provided on label • Have the same diameter within 00005" • Roundness within .000010" • Taper does not exceed .000010" • Standard 2" lengths

0.00481 0.00577 0.00601 0.00642 0.00722 0.00802 0.00902 0.01031 0.01155 0.01203 0.01312 0.01443 0.01604 0.01804 0.01925 0.02062 0.02138 0.02221 0.02406 0.02624 0.02887 0.03208 0.03608 0.04124 0.04441 0.04811 0.0502 0.05249 0.05774 0.06415 0.07217 0.07698 0.08248 0.09623 0.10497 0.11547 0.1283 0.14434 0.16496 0.17765 0.19245 0.20995 0.23094 0.28868

95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00 95.00

Max.

Best

Min.

60° 55°

1.010362p .57735p

.505182p

.82573p .563692p .50568p

53°-8° 47 1 / 2 °

.97828p .55902p .72889p .54625p

.54076p .49852p

29° Acme .650013p .51645p

.487263p

TMW-7 1/2

p=Pitch n=TPI P= 1/n

TMW-7 TMW-6

Notes: Maximum and minimum wires should be used which are safely within the limiting dimensions given by the above formulas. Call for information and pricing of special wire diameters including Whitworth, British Association, Buttress and worm threads.

TMW-5 1/2

139.00 139.00 139.00 139.00 139.00 139.00 139.00 139.00 139.00 139.00

TMW-5

TMW-4 1/2

TMW-4

TMW-3 1/2 TMW-3 1/4

TMW-3

TMW-2 3/4 TMW-2 1/2

TMW-2

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