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Taperlock Thread Plug Gage

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  • Taperlock Thread Plug Gage
  • Taperlock Thread Plug Gage double end

Taperlock Thread Plug Gages

  • Taperlock thread plug gages check the size of internal threads to ensure the threads are within its designed tolerance limits
  • GO and/or NO GO thread plug members
  • Class X Tolerance
  • Class 2B or 3B for inch
  • Class 6H of fit for metric thread plug
  • ASME/ANSI B1. 2 and ANSI/ASME B1.16M compliant
  • Precision hand lapped to provide superior accuracy , optimum finish and maximum wearability
  • Final inspection of gages is completed in an environmentally controlled ISO 17025 laboratory
  • Available in steel and chrome
  • Free NIST certificate of accuracy


Please select a measure::


Steel Chrome
Size Member Item # Price Sale Price Item # Price Sale Price
0-80 GO / NOGOTLT-01$46.00$42.00TLTC-01$56.00$50.00
DOUBLE ENDTLTDE-01$114.00$106.00TLTCDE-01$133.00$123.00
1-64 GO / NOGOTLT-02$46.00$42.00TLTC-02$56.00$50.00
DOUBLE ENDTLTDE-02$114.00$106.00TLTCDE-02$133.00$123.00
1-72 GO / NOGOTLT-03$46.00$42.00TLTC-03$56.00$50.00
DOUBLE ENDTLTDE-03$114.00$106.00TLTCDE-03$133.00$123.00
2-56 GO / NOGOTLT-04$44.00$40.00TLTC-04$53.00$48.00
DOUBLE ENDTLTDE-04$110.00$102.00TLTCDE-04$127.00$117.00
2-64 GO / NOGOTLT-05$44.00$40.00TLTC-05$53.00$48.00
DOUBLE ENDTLTDE-05$110.00$102.00TLTCDE-05$127.00$117.00
3-48 GO / NOGOTLT-06$40.00$36.00TLTC-06$48.00$44.00
DOUBLE ENDTLTDE-06$102.00$94.00TLTCDE-06$119.00$109.00
3-56 GO / NOGOTLT-07$40.00$36.00TLTC-07$48.00$44.00
DOUBLE ENDTLTDE-07$102.00$94.00TLTCDE-07$119.00$109.00
4-40 GO / NOGOTLT-08$36.00$32.00TLTC-08$43.00$39.00
DOUBLE ENDTLTDE-08$93.00$87.00TLTCDE-08$108.00$100.00
4-48 GO / NOGOTLT-09$38.00$34.00TLTC-09$45.00$41.00
DOUBLE ENDTLTDE-09$98.00$90.00TLTCDE-09$112.00$104.00
5-40 GO / NOGOTLT-10$33.00$29.00TLTC-10$39.00$35.00
DOUBLE ENDTLTDE-10$87.00$81.00TLTCDE-10$100.00$92.00
5-44 GO / NOGOTLT-11$33.00$29.00TLTC-11$39.00$35.00
DOUBLE ENDTLTDE-11$87.00$81.00TLTCDE-11$100.00$92.00
6-32 GO / NOGOTLT-12$29.00$27.00TLTC-12$36.00$32.00
DOUBLE ENDTLTDE-12$81.00$75.00TLTCDE-12$93.00$87.00
6-40 GO / NOGOTLT-13$29.00$27.00TLTC-13$36.00$32.00
DOUBLE ENDTLTDE-13$81.00$75.00TLTCDE-13$93.00$87.00
8-32 GO / NOGOTLT-14$29.00$27.00TLTC-14$36.00$32.00
DOUBLE ENDTLTDE-14$81.00$75.00TLTCDE-14$93.00$87.00
8-36 GO / NOGOTLT-15$29.00$27.00TLTC-15$36.00$32.00
DOUBLE ENDTLTDE-15$81.00$75.00TLTCDE-15$93.00$87.00
10-24 GO / NOGOTLT-16$29.00$27.00TLTC-16$36.00$32.00
DOUBLE ENDTLTDE-16$81.00$75.00TLTCDE-16$93.00$87.00
10-32 GO / NOGOTLT-17$29.00$27.00TLTC-17$36.00$32.00
DOUBLE ENDTLTDE-17$81.00$75.00TLTCDE-17$93.00$87.00
12-24 GO / NOGOTLT-18$29.00$27.00TLTC-18$36.00$32.00
DOUBLE ENDTLTDE-18$81.00$75.00TLTCDE-18$93.00$87.00
12-28 GO / NOGOTLT-19$29.00$27.00TLTC-19$36.00$32.00
DOUBLE ENDTLTDE-19$81.00$75.00TLTCDE-19$93.00$87.00
12-32 GO / NOGOTLT-20$41.00$37.00TLTC-20$49.00$45.00
DOUBLE ENDTLTDE-20$104.00$96.00TLTCDE-20$121.00$111.00
1/4-20 GO / NOGOTLT-21$27.00$25.00TLTC-21$33.00$29.00
DOUBLE ENDTLTDE-21$77.00$71.00TLTCDE-21$87.00$81.00
1/4-28 GO / NOGOTLT-22$27.00$25.00TLTC-22$33.00$29.00
DOUBLE ENDTLTDE-22$77.00$71.00TLTCDE-22$87.00$81.00
1/4-32 GO / NOGOTLT-23$50.00$46.00TLTC-23$61.00$55.00
DOUBLE ENDTLTDE-23$123.00$113.00TLTCDE-23$144.00$132.00
5/16-18 GO / NOGOTLT-24$27.00$25.00TLTC-24$33.00$29.00
DOUBLE ENDTLTDE-24$77.00$71.00TLTCDE-24$87.00$81.00
5/16-24 GO / NOGOTLT-25$27.00$25.00TLTC-25$33.00$29.00
DOUBLE ENDTLTDE-25$77.00$71.00TLTCDE-25$87.00$81.00
5/16-32 GO / NOGOTLT-26$50.00$46.00TLTC-26$61.00$55.00
DOUBLE ENDTLTDE-26$123.00$113.00TLTCDE-26$144.00$132.00
3/8-16 GO / NOGOTLT-27$27.00$25.00TLTC-27$33.00$29.00
DOUBLE ENDTLTDE-27$77.00$71.00TLTCDE-27$87.00$81.00
3/8-24 GO / NOGOTLT-28$27.00$25.00TLTC-28$33.00$29.00
DOUBLE ENDTLTDE-28$77.00$71.00TLTCDE-28$87.00$81.00
3/8-32 GO / NOGOTLT-29$59.00$53.00TLTC-29$70.00$64.00
DOUBLE ENDTLTDE-29$140.00$128.00TLTCDE-29$163.00$149.00
7/16-14 GO / NOGOTLT-30$28.00$26.00TLTC-30$34.00$30.00
DOUBLE ENDTLTDE-30$79.00$73.00TLTCDE-30$89.00$83.00
7/16-20 GO / NOGOTLT-31$28.00$26.00TLTC-31$34.00$30.00
DOUBLE ENDTLTDE-31$79.00$73.00TLTCDE-31$89.00$83.00
7/16-28 GO / NOGOTLT-32$59.00$53.00TLTC-32$70.00$64.00
DOUBLE ENDTLTDE-32$140.00$128.00TLTCDE-32$163.00$149.00
1/2-13 GO / NOGOTLT-33$29.00$27.00TLTC-33$36.00$32.00
DOUBLE ENDTLTDE-33$81.00$75.00TLTCDE-33$93.00$87.00
1/2-20 GO / NOGOTLT-34$29.00$27.00TLTC-34$36.00$32.00
DOUBLE ENDTLTDE-34$81.00$75.00TLTCDE-34$93.00$87.00
1/2-28 GO / NOGOTLT-35$60.00$54.00TLTC-35$70.00$64.00
DOUBLE ENDTLTDE-35$142.00$130.00TLTCDE-35$163.00$149.00
9/16-12 GO / NOGOTLT-36$40.00$36.00TLTC-36$49.00$45.00
DOUBLE ENDTLTDE-36$102.00$94.00TLTCDE-36$121.00$111.00
9/16-18 GO / NOGOTLT-37$40.00$36.00TLTC-37$49.00$45.00
DOUBLE ENDTLTDE-37$102.00$94.00TLTCDE-37$121.00$111.00
9/16-24 GO / NOGOTLT-38$67.00$61.00TLTC-38$81.00$73.00
DOUBLE ENDTLTDE-38$156.00$144.00TLTCDE-38$184.00$168.00
5/8-11 GO / NOGOTLT-39$41.00$37.00TLTC-39$49.00$45.00
DOUBLE ENDTLTDE-39$104.00$96.00TLTCDE-39$121.00$111.00
5/8-18 GO / NOGOTLT-40$41.00$37.00TLTC-40$49.00$45.00
DOUBLE ENDTLTDE-40$104.00$96.00TLTCDE-40$121.00$111.00
5/8-24 GO / NOGOTLT-41$67.00$61.00TLTC-41$81.00$73.00
DOUBLE ENDTLTDE-41$156.00$144.00TLTCDE-41$184.00$168.00
11/16-24 GO / NOGOTLT-42$67.00$61.00TLTC-42$81.00$73.00
DOUBLE ENDTLTDE-42$156.00$144.00TLTCDE-42$184.00$168.00
3/4-10 GO / NOGOTLT-43$43.00$39.00TLTC-43$50.00$46.00
DOUBLE ENDTLTDE-43$108.00$100.00TLTCDE-43$123.00$113.00
3/4-16 GO / NOGOTLT-44$43.00$39.00TLTC-44$51.00$47.00
DOUBLE ENDTLTDE-44$108.00$100.00TLTCDE-44$125.00$115.00
3/4-20 GO / NOGOTLT-45$68.00$62.00TLTC-45$82.00$74.00
DOUBLE ENDTLTDE-45$159.00$146.00TLTCDE-45$186.00$170.00
13/16-20 GO / NOGOTLT-46$77.00$69.00TLTC-46$92.00$84.00
DOUBLE ENDTLTDE-46$175.00$161.00TLTCDE-46$207.00$189.00
7/8-9 GO / NOGOTLT-47$45.00$41.00TLTC-47$55.00$49.00
DOUBLE ENDTLTDE-47$112.00$104.00TLTCDE-47$131.00$121.00
7/8-14 GO / NOGOTLT-48$47.00$43.00TLTC-48$57.00$51.00
DOUBLE ENDTLTDE-48$117.00$108.00TLTCDE-48$135.00$125.00
7/8-20 GO / NOGOTLT-49$77.00$69.00TLTC-49$92.00$84.00
DOUBLE ENDTLTDE-49$175.00$161.00TLTCDE-49$207.00$189.00
5/16-20 GO / NOGOTLT-50$78.00$70.00TLTC-50$93.00$85.00
DOUBLE ENDTLTDE-50$177.00$163.00TLTCDE-50$209.00$191.00
1-8 GO / NOGOTLT-51$55.00$49.00TLTC-51$65.00$59.00
DOUBLE ENDTLTDE-51$131.00$121.00TLTCDE-51$152.00$140.00
1-12 GO / NOGOTLT-52$55.00$49.00TLTC-52$65.00$59.00
DOUBLE ENDTLTDE-52$131.00$121.00TLTCDE-52$152.00$140.00
1-14 GO / NOGOTLT-53$55.00$49.00TLTC-53$65.00$59.00
DOUBLE ENDTLTDE-53$131.00$121.00TLTCDE-53$152.00$140.00
1-20 GO / NOGOTLT-54$89.00$81.00TLTC-54$107.00$97.00
DOUBLE ENDTLTDE-54$201.00$184.00TLTCDE-54$236.00$216.00
1 1/16-12 GO / NOGOTLT-55$91.00$83.00TLTC-55$109.00$99.00
DOUBLE ENDTLTDE-55$205.00$187.00TLTCDE-55$240.00$220.00
1 1/16-18 GO / NOGOTLT-56$91.00$83.00TLTC-56$109.00$99.00
DOUBLE ENDTLTDE-56$205.00$187.00TLTCDE-56$240.00$220.00
1 1/8-7 GO / NOGOTLT-57$68.00$62.00TLTC-57$82.00$74.00
DOUBLE ENDTLTDE-57$159.00$146.00TLTCDE-57$186.00$170.00
1 1/8-12 GO / NOGOTLT-58$68.00$62.00TLTC-58$82.00$74.00
DOUBLE ENDTLTDE-58$159.00$146.00TLTCDE-58$186.00$170.00
1 1/8-18 GO / NOGOTLT-59$90.00$82.00TLTC-59$108.00$98.00
DOUBLE ENDTLTDE-59$203.00$185.00TLTCDE-59$238.00$218.00
1 3/16-12 GO / NOGOTLT-60$97.00$87.00TLTC-60$116.00$105.00
DOUBLE ENDTLTDE-60$217.00$199.00TLTCDE-60$255.00$233.00
1 3/16-18 GO / NOGOTLT-61$97.00$87.00TLTC-61$116.00$105.00
DOUBLE ENDTLTDE-61$217.00$199.00TLTCDE-61$255.00$233.00
1 1/4-7 GO / NOGOTLT-62$70.00$64.00TLTC-62$84.00$76.00
DOUBLE ENDTLTDE-62$165.00$151.00TLTCDE-62$192.00$176.00
1 1/4-12 GO / NOGOTLT-63$70.00$64.00TLTC-63$84.00$76.00
DOUBLE ENDTLTDE-63$165.00$151.00TLTCDE-63$192.00$176.00
1 1/4-18 GO / NOGOTLT-64$92.00$84.00TLTC-64$111.00$101.00
DOUBLE ENDTLTDE-64$209.00$191.00TLTCDE-64$247.00$225.00
1 5/16-12 GO / NOGOTLT-65$105.00$95.00TLTC-65$126.00$114.00
DOUBLE ENDTLTDE-65$234.00$214.00TLTCDE-65$276.00$252.00
1 5/16-18 GO / NOGOTLT-66$105.00$95.00TLTC-66$126.00$114.00
DOUBLE ENDTLTDE-66$234.00$214.00TLTCDE-66$276.00$252.00
1 3/8-6 GO / NOGOTLT-67$80.00$72.00TLTC-67$96.00$86.00
DOUBLE ENDTLTDE-67$184.00$168.00TLTCDE-67$215.00$197.00
1 3/8-12 GO / NOGOTLT-68$80.00$72.00TLTC-68$96.00$86.00
DOUBLE ENDTLTDE-68$184.00$168.00TLTCDE-68$215.00$197.00
1 3/8-18 GO / NOGOTLT-69$110.00$100.00TLTC-69$132.00$120.00
DOUBLE ENDTLTDE-69$245.00$224.00TLTCDE-69$289.00$263.00
1 7/16-12 GO / NOGOTLT-70$114.00$104.00TLTC-70$138.00$124.00
DOUBLE ENDTLTDE-70$253.00$231.00TLTCDE-70$299.00$273.00
1 7/16-18 GO / NOGOTLT-71$114.00$104.00TLTC-71$138.00$124.00
DOUBLE ENDTLTDE-71$253.00$231.00TLTCDE-71$299.00$273.00
1 1/2-6 GO / NOGOTLT-72$90.00$82.00TLTC-72$108.00$98.00
DOUBLE ENDTLTDE-72$205.00$187.00TLTCDE-72$240.00$220.00
1 1/2-12 GO / NOGOTLT-73$90.00$82.00TLTC-73$108.00$98.00
DOUBLE ENDTLTDE-73$205.00$187.00TLTCDE-73$240.00$220.00
1 1/2-18 GO / NOGOTLT-74$119.00$107.00TLTC-74$143.00$129.00
DOUBLE ENDTLTDE-74$261.00$239.00TLTCDE-74$310.00$282.00


Taperlock thread plug gage is used to check the size of internal threads to ensure the threads are within its designed tolerance limits. Taperlock thread plug gages are available with GO and/or NOGO plug members and are manufactured to Class X tolerance in 2B or 3B and to an X tolerance in Class 6H of fit for metric. Taperlock design up to 1 1/2" (38.1mm). Sizes larger than 1 1/2" are trilock design. Chip grooves are provided on all GO work Plug members in sizes #10 and larger for inch and in sizes M5 and larger for metric.

Chip grooves, also called dirt grooves, are located at the entering end of the gage. They provide a means of cleaning the dirt and other debris from the internal product thread. All gages are inspected in an environmentally controlled lab and manufactured in full conformance to ASME/ANSI B1. 2, ANSI/ASME B1.16M and/or H28 handbook gage standards. WESTport gages are manufactured to the highest end of the ANSI specifications to ensure the longest gage life possible. Taperlock thread plug gages are available in steel and chrome.

WESTport Gage provides a Certificate of Accuracy, traceable to NIST (National Institute of Standards and Technology), free of charge with every gage .

WESTport Manufactured Products. 24th Anniversary Servicing Industry Worldwide (1989-2013)