Types of Japanese Screws

Written by kristen moutria
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Types of Japanese Screws
Several different types of Japanese screws are manufactured. (screw image by Pali A from Fotolia.com)

Japanese screws are manufactured in Europe. They are fasteners used to hold items together. The screws have a head at the end that can be driven by a screwdriver or wrench, and the head is larger than the screw, providing a bearing surface. They include anything from machine screws and washer assemblies to cold-formed parts to a customer's drawing. Several different types of Japanese screws are used for various purposes.

JCIS Micro Screws

JCIS micro screws are made to Japanese camera industrial standards. They are anywhere from 0.6 to 2mm in diameter and have several different head shapes and thread forms. These Japanese screws are tested for quality control using a torque computer. Salt spray and thickness plating finish are added to the screw as well as harness checks and full-gauge testing equipment. They are also calibrated. This is the smallest type of Japanese screw.

JIS Standard Screws

The JIS standard screws are set apart from other screws because of their usage and measurement variations. These screws are used in several different market sectors, such as consumer electronics, white goods, automotive, medical, hydraulic, production machinery, telecommunications, construction and building supplies and construction equipment. An optical and laser sorting is performed on all JIS standard screws to ensure quality. These screws are larger than micro screws but have a full range of sizes.

JIS Screw and Washer Assemblies

Several different types of JIS screw and washer assemblies are manufactured. They include machine screw products, thread forming screws, tapping screws, machine screw thread, threadforming screw thread and tapping screw thread. Several options exist for what materials are used to make the screw, such as unhardened and case hardened steel, stainless steel, zinc clear Cr3, zinc black Cr3, nickel, black nickel, tin, geomet and disco.

Screw Heads

Different types of screw heads can be paired with Japanese screws. These include spring and plain washer assemblies, spring washer assemblies, plain washer assemblies and outside tooth lock washer assemblies. Also available are pan, bind, brazier, truss and hex screw heads. You can get ultra thin heads that are 0.5 to 0.6mm thick with washers and nuts to match.

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