H.J TECH INDUSTRY LIMITED
H.J TECH INDUSTRY LIMITED
Professional and faithful Metal products Manufacturer & Exporter
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spring nut
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H.J Tech Industry  Has Grown To Become A  Professional  Washers,Pipe Clamps,Funuture Reinforcements,Construction Brackets,Stamping Parts Manufacturer  in China.
Quality

H.J Tech Industry is certificated according to the ISO 9001:2000 since 2005 and the Production Process Controls:
At the entrance;
During the production;
At the end of the process;
Also  many kinds of quality tests are supported.

News
what is washer in hardware
( Updated: 2012-7-4 )

A washer is a thin plate (typically disk-shaped) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a screw or nut.

Increase the bearing surface of a nut or fastener's head, provide a smooth mating surface or protect the surface from damage when the nut or head is rotated, compensate for oversized or irregular shaped holes, space or shim parts, or to resist loosening.

Other uses are as a spacer, spring (belleville washer, wave washer), wear pad, preload indicating device, locking device, and to reduce vibration (rubber washer). Washers usually have an outer diameter (OD) about twice the length of their inner diameter (ID).

Depending on the washer type, common materials include aluminum, brass, nylon, silicon bronze, stainless steel and steel. Finishes include nickel for brass and steel, and hot dip galvanizing and zinc platied(blue,yellow,white),black,for steel;polish for stainless steel.

Address:No.817 Jinyang Road,Jiashan County,Jiaxing City,China Phone:+86-573-84297069 Fax:+86-573-84297068
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