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The Ulitmate Metric Screw Thread Resource: Basic Dimensions, Classes, Tolerances, Formulas, Charts, and Explanations
The Metric Thread Chart PDF is a comprehensive guide that will make finding the right metric thread size easier than ever. It lists the major diameter, thread pitch, minor diameter, and pitch diameter for all metric thread sizes. All you have to do is look up the thread size that you need and match the numbers.
Major Diameter (mm) Explained. The major diameter in our bolt size chart, typically measured in millimetres (mm), refers to the largest diameter of a threaded cylinder, also known as the crest of the thread. This is a critical parameter as it essentially dictates all metric bolt sizes.
ISO 724 specifies basic dimensions of metric threads in accordance with ISO 261. Dimensions refer to the basic profile in accordance with ISO 68. The pitch varies from coarse to extra fine with up to 5 different pitches for some dimensions. The thread angle is 60 o and the thread depth is 0.614 x pitch.
This clause specifies the basic profile for ISO general purpose metric screw threads as shown in Figure 1. The dimensions for the various standard pitches are given in Table 1.
20 Δεκ 2011 · MARYLAND METRICS -- THREAD DATA CHART: Metric Thread -- Coarse Pitch Nominal Size ISO M Thread Form Type Major Diameter mm d=D Pitch mm p Root Radius mm r Pitch Diameter mm d2=D2 Minor Diameter Male Thd. d3 Minor Diameter Female Thd. D1 Thread Height Male Thd. h3 Thread Height Female Thd. H1 Tap Drill Diameter mm
Click here to return to the thread data chart page index. ISO Metric profile External (bolt thread) Internal (nut thread) Basic mm Size mm Thread Designation Simple Thread Designation Pitch mm Class Major Dia d=D max. min. Pitch Dia d2=D2 max. min. Minor Dia d3 max. min. Class Minor Dia D1 min. max. Pitch Dia d2=D2 min. max.
