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The limit dimensions for standard threads given in the table correspond to the - tolerance field 6g for bolt threads - tolerance field 6H for nut threads. The metric steel / metal threads specified in this catalog are based on these tolerance fields.
10.5 DIN 13 ISO Metric threads ISO Metric threads – DIN 13 (Thread limits for standard engagement lengths to UNI 5545-65) Nominal thread-Ø Gra-dient P Screw with tolerance of 6g Nut screw with tolerance of 6H Ø major d Ø pitch d 2 Ø minor d 1 Ø major D Ø pitch D Ø minor D max. min. max. min. max. min. min. max. min. max. min. max.
having to the tolerances for the period in which the threads are still in use, they have modified to conform to the ISO standard. The tolerances below have t*en taken from the January 1952 of D IN 13 Part 15.
This part of ISO 965 specifies a tolerance system for ISO general purpose metric screw threads (M) according to ISO 261. The tolerance system refers to the basic profile according to ISO 68-1.
1,4: 0,2: 24: 30: 38: 48---0,25: 26: 34: 42: 53---0,3: 28: 36: 45: 56--1,4: 2,8: 0,2: 25: 32: 40: 50---0,25: 28: 36: 45: 56---0,35: 32: 40: 50: 63: 80--0,4: 34: 42: 53: 67: 85--0,45: 36: 45: 56: 71: 90 ~-2,8: 5,6: 0,35: 34: 42: 53: 67: 85--0,5: 38: 48: 60: 75: 95--0,6: 42: 53: 67: 85: 106--0,7: 45: 56: 71: 90: 112--0,75: 45: 56: 71: 90: 112--0 ...
The limiting sizes for standard threads given in the table comply with - tolerance field 6g for bolt threads - tolerance field 6H for nut threads. The metric steel and metal threads specified in this catalogue are based on the tolerance fields given above.
ISO 965 consists of the following parts, under the general title ISO general purpose metric screw threads — Tolerances: — Part 1: Principles and basic data. — Part 2: Limits of sizes for general purpose external and internal screw threads — Medium quality. — Part 3: Deviations for constructional screw threads.
