/ Precision Measuring Tools / Precision Hand Tools / Fixed Gage Standards / Angle Gages / C391 * Not actual product image C391 Center Gage 51475 C391,392,C396,C398M Center Gages and Attachments Steel Center Gage, 60 Deg Range, American Unified National Standard The Starrett C391 Center Gage features inch graduations, meets the American Unified National Standard and US 60 degree standards. American unified National Standard, 60 Deg. Features Specifications 3D CAD Files / Exploded Parts Diagram Product Testimonials Other similar products C391 Center Gage C396 Center Gage C398M Center Gage Contact Starrett Features Extremely handy for use in grinding and setting screw cutting tools American National or U.S. 60 Deg standards Very useful for finding number of threads per inch through graduations in 14ths, 20ths, 24ths and 32nds of an inch. Gage also has a table of double depths of threads for determining size of tap drills. Made of spring-tempered steel with satin chrome finish. Ground gaging surfaces Specifications Made in America: Yes Range (Deg): American Unified National Standard, 60º Material: Steel 3D CAD Files / Exploded Parts Diagram Login to see related product files. Or create an account. Product Testimonials Write a product review Write a product review Comments* First Name* Last Name* Email* Occupation The information you provide will be used in accordance with the terms of our privacy policy. I agree to the privacy policy. Please provide the required information. Thank you for submitting a product testimonial on www.starrett.com. By submitting information to Starrett, you acknowledge and give express permission for the L.S. Starrett Company to use and share your statements.