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Mitutoyo Holtest Vernier Inside Micrometer, Three-Point, Inch

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Product Specifications
Manufacturer Series Number
Series 368
Brand Name
System of Measurement

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0.275-0.35" 0.0001" +/-0.0001" 368-261 B003UATI96 yes $495.27 Buy Options
0.35-0.425" 0.0001" +/-0.0001" 368-262 B003UATI9G yes $474.87 Buy Options
0.425-0.5" 0.0001" +/-0.0001" 368-263 B003UATIA0 yes $467.22 Buy Options
0.5-0.65" 0.0002" +/-0.0001" 368-264 B003UATIAA yes $487.62 Buy Options
0.65-0.8" 0.0002" +/-0.0001" 368-265 B003UATIAK yes $507.00 Buy Options
0.8-1" 0.0002" +/-0.00015" 368-266 B003UATIAU yes $523.32 Buy Options
1-1.2" 0.0002" +/-0.00015" 368-267 B003UATIB4 yes $518.22 Buy Options
1.2-1.6" 0.0002" +/-0.00015" 368-268 B003UATIBE Usually ships in 24 hours $629.83 Buy Options
1.6-2" 0.0002" +/-0.00015" 368-269 B003UATIBO yes $709.47 Buy Options
10-11" 0.0002" +/-0.00025" 368-280 B003UATIF0 yes $1,735.57 Buy Options
11-12" 0.0002" +/-0.00025" 368-281 B003UATIFA yes $1,645.57 Buy Options
2-2.5" 0.0002" +/-0.00015" 368-270 B003UATIBY yes $668.67 Buy Options
2.5-3" 0.0002" +/-0.00015" 368-271 B003UATIC8 yes $729.87 Buy Options
3-3.5" 0.0002" +/-0.00015" 368-272 B003UATICI yes $750.27 Buy Options
3.5-4" 0.0002" +/-0.00015" 368-273 B003UATICS yes $852.27 Buy Options
4-5" 0.0002" +/-0.00025" 368-274 B003UATID2 yes $1,135.57 Buy Options
5-6" 0.0002" +/-0.00025" 368-275 B003UATIDM yes $1,195.57 Buy Options
6-7" 0.0002" +/-0.00025" 368-276 B003UATIDW yes $1,270.57 Buy Options
7-8" 0.0002" +/-0.00025" 368-277 B003UATIE6 yes $1,540.00 Buy Options
8-9" 0.0002" +/-0.00025" 368-278 B003UATIEG yes $1,750.00 Buy Options

Key Features

  • Three-point contacts for self-centering measurement of the inside dimension (ID) of bores
  • Vernier scale in inch units for taking precise inside dimension (ID) measurements
  • Ratchet-stop mechanism helps provide uniform pressure for precise, repeatable measurements
  • Satin chrome finish helps resist rust and reduce glare
  • Carbide or TiN coating on measuring faces helps provide wear resistance

Product Description

The Mitutoyo 368 series Holtest vernier inside micrometer has three-point contacts for self-centering measurement of the inside dimension (ID) of bores, and a vernier scale in inch units for taking precise ID measurements. It also has a ratchet-stop mechanism that helps provide uniform pressure for precise, repeatable measurements.

The micrometer is made of high-grade tool steel for durability and has a satin chrome rust- and glare-resistant finish. The vernier scale is graduated to 0.0001” or 0.0002” depending on the model. The measuring faces are carbide-tipped or TiN-coated for wear resistance depending on the model. The micrometer comes with a fitted case for storage.

Micrometers are precision measuring instruments that use a calibrated screw to measure small distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot.

Mitutoyo manufactures precision measuring tools, metrology equipment, and systems. The company was founded in Tokyo in 1934 and formed Mitutoyo America Corporation in 1963, which is headquartered in Aurora, IL.

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