1 Spring washers should be made of wire according to all-Union State Standard 11850-72 or another normative and technical documentation made of steel 65G, 70 and 3H13. It’s acceptable to make spring washers of bronze BrKMtsZ according to all-Union State Standard 18175-78 or other non-ferrous alloys. (Redraft, Alteration №3)
2 Mass of steel washers and calculated elastic force from steel 65G are in the informative annex.
3 Steel spring washers should have hardness 41,5 - 49,5 HRCэ (HRC 40-48), bronze ones at least 90 HRB. It’s acceptable to increase hardness up to 51,5 HRCэ (HRC 50) for washers made of steel 70.
4 There should be no scales, burrs, flaws and corrosion on washer face. Track of inseparable scale is not a discarded sign. Defects which don’t influence on washers’ operational characteristics and don’t output dimensions for maximum deviation are acceptable.
5 Washer’s end should have flat surface; shearing of metal, which don’t output dimensions m for maximum deviation, is not a discarded sign.
Edge formed by   shear plane and washer supporting surface must be sharp.
6 Trapezoidal washer section within height s is not a discarded sign.
For the actual thickness is taken maximum size of heights.
7 (Excluded, Alteration №3)
8 Washers should be made with covering or without it. Type of covering, their conventions and thickness  -  according to all-Union State Standard 1759.0-87. It’s acceptable to use other types of covering - according to all-Union State Standard 9.306-85. (Redraft, Alteration №3). Please contact us for more.