Example of Metric Descriptions. Din 931; indicates partially threaded hex head cap screw — The DIN 931 standard will specify the thread tolerance. M16; diameter in millimeters (16 mm). In the metric system, all fasteners are assumed coarse thread unless another thread pitch is stated. Fastener Standards and Guidelines. 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. Proper Drill Bit Size for Drilling Pilot Holes Shank Holes. SAE and Metric Fastener Torque Specifications iii . 8 SAE and Metric Fastener Torque Specifications Metric Plain and Zinc Plated Hex and Socket Head Cap Screws TORQUE CHART - METRIC PLAIN AND ZINC PLATED HEX HEAD AND SOCKET HEAD CAP SCREWS. Class 4.6 . …

The following are to links of ISO Metric Hardware Specifications Table Charts. ISO Metric Hardware Specifications Table Chart . ANSI Hardware Menu . Metric External ( Fasteners ) Thread and Fastener Sizes M105 - M135; Metric External ( Fasteners ) Thread and Fastener Sizes M140 - Fastener Specs Technical Data Click image to enlarge These specs include dimensional and technical data on heremonly used hereponents available. Most ASTM specifications allow for the production of metric series and inch series fastener s from the same specification. For example, ASTM A490 allows for the production of ASTM A490M. The ASTM A490M is the metric A490 structural bolt (not to be confused with the DIN 6914: 10.9 structural bolt.

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,. A metric machine screw is a straight shank fastener with a metric thread pitch designed to go through a hole or nut that is pre- tapped to form a mating thread for the screw. Applications/ Advantages. Machine screws form a fastening superior in strength to spaced thread screws. Fastener and Screw / Bolt Design, Formula and Calculations. The following table chart defines standard metric external thread size M1.6 to M18 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. Do not use these values for standard metric internal thread design.