Customer Service

How to Order

Call, fax, or email us for the fastest service. All purchasing orders faxed or emailed must have the following information.

  • Ship to: / Bill to information
  • Telephone / Fax numbers
  • Contact information

Shipping Policy

FOB shipping point Ronkonkoma, New York. Orders are shipped UPS ground unless requested otherwise. (Exceptions: Packages over 80 lbs may be shipped by common carrier.)

Returns: Non Defective Items

Standard items may be returned within 15 days from the date of invoice. A return authorization number must be issued from Thread Check prior to return and items must be returned within 6 days from RA number issue. A 20-30% restocking charge is assessed on returns of standard product. Upon inspection, credit will be given on standard items returned in resalable (like new) condition and charges for freight out. Special items may not be returned.


Thread Check's accepted methods of payment
American Express Mastercard VISA

To establish a net 30 credit account, please email us at

or call to request our Credit Application Form.

Please allow up to 5 days to process your order

In order to avoid delay in processing your order, we also accept Visa, MasterCard and American Express.

Payment via bank wire transfer

Please contact us for our bank wire transfer information.

As many of our orders require special processing requirements including special gage sizes, tooling, gage blanks, custom marking and other specific customer requirements, it is company policy that we charge your credit card at time of order. In the event of a Cancellation, charges will be incurred for the portion of the order or service completed.

Alternate payment arrangements should be discussed with your sales representative.

Contact Us

By Phone

Feel free to call us at 1-800-767-7633 in the U.S. and Canada with any questions or comments. We're standing by from Monday - Friday 8:30 am - 5:30 pm Eastern Time to give you the help you need.

By Fax

Use our toll-free at 1-800-767-2034, to fax orders (World Wide: 1-631-231-1515) (24 Hour Fax: 1-631-231-1625).

By Mail
Thread Check, Inc.
900 Marconi Ave.
Ronkonkoma, NY 11779
By Email

Thread Check, Inc. offers calibration services through an ISO 9001 and ISO 17025 Accredited Metrology Facility. Standard turnaround time is 2-3 days on many items. Call for pricing.

All items unless noted are manufactured in the U.S.A

Thread Check, Inc. ships world wide.

All Thread Check, Inc. gages and precision measuring instruments are traceable to N.I.S.T

Thread Check, Inc. gages are inspected at 68° deg. F and 50% humidity.


Thread Check, Inc. does specials! If you do not see an item in our catalog, call our sales engineering staff for price and availability. Thread Check's engineering staff will assist in designing and manufacturing of special gaging products from concept to completion.

Thread Check Privacy Policy

Thread Check Inc. and TCI Industrial Supply Ltd.'s, privacy policy covers the collection and use of personal and company contact information that may be collected by Thread Check Inc. anytime you interact with us, such as when you visit our website, purchase Thread Check, Inc. and TCI Industrial Supply products and services, or when you call our sales or support associates. Please take a moment to read the following to learn more about our information practices, including what type of information is gathered, how the information is used and for what purposes, to whom we disclose the information, and how we safeguard your personal and company information. Your privacy is a priority at Thread Check Inc., and we take this responsibility very seriously.

Why we collect personal and company information

We collect your personal and company information because it helps us deliver a superior level of customer service. It enables us to give you convenient access to our products and services and focus on categories of greatest interest to you. In addition, your personal and company information helps us keep you posted on the latest product announcements, software updates, special offers, product upgrades, and events that you may be interested in.

What information do we collect?

There are a number of situations in which your personal and company information may help us to give you better level of customer service. For example, we may ask for your contact and company information when you are discussing a service issue on the phone with an associate, downloading a software trial, participating in an online survey, registering your products, or purchasing a product. At such times, we may collect personal and company information relevant to the situation, such as your name, shipping address, phone/fax numbers, email address, contact preferences, credit card information, and information about your company's requirements.


We use browser “cookies” on this site. A cookie is a piece of data stored on a site visitor’s hard drive to help us improve your access to our site and identify repeat visitors to our site. For instance, when we use a cookie to identify you, you would not have to log in a password more than once, thereby saving time while on our site. Please note, while our site does not require any log-in to view it, browser cookies may still be created for non-personally-identifying visit information. Cookies can also enable us to track and target the interests of our users to enhance the experience on our site. Usage of a cookie is in no way linked to any personally identifiable information on our site.

Some of our business partners may use cookies on our site (Google Analytics). However, we have no access to or control over these cookies. We utilize Google Adwords’ remarketing to advertise online and, as a result, cookies may be used to serve ads based on past visits to our website.

Visitors can opt-out of Google’s use of cookies by visiting Google’s Ads Settings page. Alternately, you may opt out of a third party vendor’s use of cookies by visiting the Network Advertising Initiative opt-out page


We share aggregated demographic information with our partners and advertisers (Google Analytics). This is not linked to any personal information that can identify any individual person or corporation.

When we disclose your information

Thread Check, Inc. and TCI Industrial Supply take your privacy very seriously. Be assured that we do not sell or rent your contact information to marketers or third parties. Your information is for our exclusive use to help us provide you with superior service. Your contact information is used exclusively by a Thread Check, Inc. authorized employee or exclusive distributor, and the information is strictly safeguarded in accordance with Thread Check, Inc.'s privacy policy. Our distributors are also obligated to protect your personal information in accordance with Thread Check's policies. Without such information being made available, it would be difficult for you to purchase products, have products delivered to you, receive customer service, and provide us with feedback to improve our products and services.

At times we may be required by law or litigation to disclose your' personal and company information. We may also disclose information about you if we determine that for national security, law enforcement, or other issues of public importance, disclosure is necessary.

How we protect your personal information

Thread Check, Inc. takes precautions - including technical, administrative, and physical measures - to safeguard your personal and company information against loss, theft, and misuse, as well as unauthorized access, disclosure, alteration, and destruction. To make sure your personal information is secured; we communicate these guidelines to all Thread Check employees and strictly enforce privacy safeguards within the company. All critical and confidential documents are electronically scanned and stored in a secured data environment. All critical paper documents are shredded in a secured and certified environment.

Privacy questions

If you do not want Thread Check, Inc. to keep you up to date with Thread Check news, software updates and the latest information on products and services contact us at Naturally, if you notify us that you do not want us to use your information for a particular purpose, we will not do so.

Thread Check, Inc. may update its privacy policy from time to time. If we change the privacy policy in a material way, we will post the updated privacy policy on our website.

Last updated May 20th, 2009 Rev1

Thread Check, Inc. Gage Warranty

Thread Check, Inc. warrants all gages for 30 days from date of shipment if found not to be in tolerance except in cases of customer mishandling. Special gages including special marking are not returnable. Thread Check, Inc. offers no further warranties, expressed or implied and its responsibilities, due to any defects or inaccuracies of the gage or certificate, shall in no event nor for any cause whatsoever exceed the purchase price of the gage.

Website Security

Site security is a priority. We periodically review and update the security methods implemented intended to protect information transmitted via this Site, including measures intended to secure and protect all personally identifiable information from loss, misuse, and alteration.

Our Site uses industry-standard encryption technology to provide for the security of your credit card numbers. The secure areas of our site use certificates provided by DigiCert® Inc, which gives assurance that the Site is authentic and that all transactions are secured by Secure Socket Layer (SSL) encryption.

By clicking "I Agree", you agree to our Terms and that you have read our Data Use Policy.