/ Precision Measuring Tools / Precision Hand Tools / Bore Gages / Mechanical Bore Micrometers / 78XTZ-312 * Not actual product image 78XTZ-312 Bore Gage 68129 78, 78M Inside Micrometers, Extended Travel with Setting Rings and Cases Inside Bore Gage Micrometer, 1/4-5/16", .00025" The Starrett 78XT Series Internal Micrometer features extended travel, reducing the need to exchange anvils. The ground contact points seat the internal micrometer faster and more accurately than the spherical contacts found in other gages. The rugged and accurate internal micrometer is available individually or in economical sets from .040-12" (1-300mm). 1/4-5/16" Range, w/3 Point Carbide Contact. Features Specifications Product Testimonials California Prop 65 Other similar products 78MXTZ-10 Bore Gage 78MXTZ-100 Bore Gage 78MXTZ-12.5 Bore Gage 78MXTZ-125 Bore Gage 78MXTZ-150 Bore Gage 78MXTZ-16 Bore Gage 78MXTZ-175 Bore Gage 78MXTZ-2.5 Bore Gage 78MXTZ-20 Bore Gage 78MXTZ-200 Bore Gage 78MXTZ-225 Bore Gage 78MXTZ-25 Bore Gage 78MXTZ-250 Bore Gage 78MXTZ-275 Bore Gage 78MXTZ-3 Bore Gage 78MXTZ-300 Bore Gage 78MXTZ-35 Bore Gage 78MXTZ-4 Bore Gage 78MXTZ-5 Bore Gage 78MXTZ-50 Bore Gage 78MXTZ-6 Bore Gage 78MXTZ-65 Bore Gage 78MXTZ-8 Bore Gage 78MXTZ-80 Bore Gage 78XTZ-1 Bore Gage 78XTZ-10 Bore Gage 78XTZ-100 Bore Gage 78XTZ-11 Bore Gage 78XTZ-12 Bore Gage 78XTZ-120 Bore Gage 78XTZ-138 Bore Gage 78XTZ-160 Bore Gage 78XTZ-2 Bore Gage 78XTZ-200 Bore Gage 78XTZ-250 Bore Gage 78XTZ-258 Bore Gage 78XTZ-312 Bore Gage 78XTZ-314 Bore Gage 78XTZ-375 Bore Gage 78XTZ-4 Bore Gage 78XTZ-5 Bore Gage 78XTZ-500 Bore Gage 78XTZ-6 Bore Gage 78XTZ-625 Bore Gage 78XTZ-7 Bore Gage 78XTZ-750 Bore Gage 78XTZ-8 Bore Gage 78XTZ-9 Bore Gage Contact Starrett Features Wide measurement range without changing anvils Tungsten carbide measuring faces on all 3-point heads above 1/2" (12.5mm) Ratchet stop ensures consistent measurements Self-centering contacts for true readings Blind bore measuring capability above 1/2" (12.5mm) diameter Extensions available up to 6" (150mm) for deep hole measuring Setting rings included Depth stop/collar also available for .080"-.250" (1-6mm) range Each micrometer bore gage is furnished in a case, complete with setting ring, contacts, wrenches, and instructions Specifications Made in America: No Range (in): 1/4 to 5/16" Graduations (in): .00025" Approximate Measuring Depth (in): 2-1/4" 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. California Proposition 65 Warning WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov