Metallic materials - Hardness test - Part 1: Rockwell test (scales A, B, C, D, E, F, G, H, K) and Rockwell superficial test (scales 15N, 30N, 45N, 15T, 30T and 45T); German version EN 10109-1:1994— 12 стр.
Metallic materials - Hardness test - Part 2: Verification of Rockwell hardness testing machines (scales A, B, C, D, E, F, G, H, K, N, T); German version EN 10109-2:1994— 9 стр.
Bolts, Screws, Nuts and Similar Threaded and Formed Parts; Technical Conditions of Delivery; Property Classes and Test Methods for Nuts of Unalloyed or Low Alloy Steels— 13 стр.