钢垫圈 meaning in English

steel spacer
steel washer

Standard specification for hardened steel washers metric
淬火钢垫圈标准规范
Standard specification for hardened steel washers
淬火钢垫圈标准规范
Standard specification for washers , steel , plain , unhardened for general use
通用未淬火扁平钢垫圈的标准规范
High strength plain steel washer
高强度平钢垫圈
High strength steel washer
高强度钢垫圈