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Table 1 Descriptions and materials of the test parts

From: Uncertainty analysis of the coefficients of friction during the tightening process of bolted joints

Test part Description/material Remark
Bolt DIN 6921 M8 × 50 10.9 Black chromated
Nut DIN 934 M8 8.8 Black chromated
Flat bar S235JRC+C (EN 1.0122) Surface polished