不含滾珠軸承、滑動軸承或滾柱軸承的單件或多件式組件。其設計旨在滿足各種或特定的安裝條件。對於帶有軸承的組件,請參閱滾珠軸承單元;滑動軸承單元;以及滾柱軸承單元。
aisi--1020 assn std 1st material response or astm a7 assn std 2nd material response overall material document and classification, steel comp m1020 or steel uns k02600 overall material