American Fastener Technologies Corporation is pleased to present you with these useful standards and guidelines for nuts, bolts, and other fasteners. For more information on these and other guidelines, please phone us at 1-800-466-9780. Nine Frontier Drive, Gibsonia, PA 15044 - 7999 U.S.A. Understanding Metric Fasteners. 1.0 = Pitch (distance from thread to thread), in millimeters 20 = Length, in millimeters (see below) This example illustrates how a coarse threaded screw may appear… M12 x 25 = 12 mm diameter, coarse thread is assumed (1.75 mm), 25 mm long M12 is a matching coarse threaded nut (To avoid confusion,. Metric Fasteners in DIN and ISO Standards This category presents all our in stock, ready-to-ship Metric fasteners in DIN and ISO standards . Bolts , nuts, screws , washers, pins, rings and more, including our lines of security screws and standoffs.

Fastener Standards . ASTM's fastener standards are instrumental in specifying, testing, and evaluating the material, dimensional, mechanical, and metallurgical properties of the various forms of hardware fasteners . These fasteners are used to mechanically join or affix other hardware objects together, heree in many forms which include rivets, nuts,. Fastener Size Designation. For standard bolts, the head size is measured in inches or fractions of an inch. For metric bolts, head size is measured in millimeters. However, metric bolt head size is measured in millimeters. ANSI B1.13M, also identified as ASME B1.13M, defines the standard for metric screw threads in American units with metric units in parenthesis. ISO METRIC STANDARDS – THE KEY TO WORLD TRADE. The WTO (hereanization), which is supported by more than 120 countries, now replaces the GATT (General Agreement on Trade and Tariffs) with the result being a considerable strengthening of its standards codes.

bolts: metric standards . Standards for metric bolts are promulgated by the ISO, but adopted by individual nations. A table of major diameters and pitches, up to 30 mm in diameter. Dec 17, 1998 Basic profile. The design principles of ISO general-purpose metric screw threads (M series threads) are defined in international standard ISO 68-1. Each thread is characterized by its major diameter, D ( Dmaj in the diagram), and its pitch, P. ISO metric threads consist of a …