Metric bolt standards pdf

Ajax fastener hand book issue99 pdf 2000 west coast fasteners. Iso metric hexagon nuts, including thin nuts, slotted. The following british standards will be found useful for reference. Metric fastener threads are also specified according to thread pitch, which is the distance between adjacent threads, again in millimeters. Iso metric screw thread chart 1st 2nd height flat size external diameter choice choice h mm af mm ac mm 10. A table of major diameters and pitches, up to 30 mm in diameter thread classes of fit. The use of precision fasteners in the worldwide market has led to the creation of many standards.

Us hex bolt sizes and thread pitches continued mm 10 20 30 40 50 60 70 80 90 100. Imperial, metric fine and non standard metric sizes will be manufacture. These fasteners are used to mechanically join or affix other hardware objects together, and come in many forms which include rivets, nuts, bolts, studs. The astm a490m is the metric a490 structural bolt not to be confused with the din 6914. For example, m10 or m106g, by default, specifies m10 x 1. This standard contains specifications for fully threaded hexagon head screws with coarse metric thread for diameters m 1. Ports sae and metric split flanges and others shaft style sae splined, keyed, tapered, cylindrical tang drive, specials on request speed 500 5000 rpm, see technical data theor. A short guide to metric nuts and bolts dd thomson engineering.

In metric bolts, strength is described by property classes. Technical specification for metric hexagonal bolts. Iso metric hexagon bolts and screws product grade c bolts asnzs 1252. Nom diapitch nom size x pitch inch bolt torque table sae j429 and asme 574 metric bolt torque table iso 898. Proof loads and tensile stress metric hexagon bolts. Machine threaded fasteners specify a thread density in threads per inch us or as a thread. The unbrako engineering guide is a guide designed to aid product selection, with reference to descriptive and technical data as well as technical discussions for application and use. If youre using a blueprint or another source of information, the label may also be there. This clause specifies the basic profile for iso general purpose metric screw threads as shown in figure 1. Lubricate all contact areas of the bolts and washers. How to determine bolt thread size bolt threads strength.

Also included in this standard are requirements and recommendations regarding flange bolting, flange gaskets, and flange joints. Metric hex bolt diameters and thread pitches bolt depot. Lubed means cleaned, dry bolts, lubricated with standard medium viscosity machine oil. Besides fasteners, the other main products that boltfast supplies are. Length is measured from under the head to the end of the bolt note. Astms fastener standards are instrumental in specifying, testing, and evaluating the material, dimensional, mechanical, and metallurgical properties of the various forms of hardware fasteners. Standard specification for compressiblewashertype direct tension indicators for use with structural fasteners, inch and metric series. Most astm specifications allow for the production of metric series and inch series fasteners from the same specification. This is represented by the last number in a metric bolt s designation. Standards for metric bolts are promulgated by the iso, but adopted by individual nations dimensions. For example, a metric screw callout looks something like m12 x 1. The standard metric fastener thread series for general purpose threaded components is the m thread profile and the coarse pitch thread series. Din 933 1987 this standard contains specifications for fully threaded hexagon head screws with coarse metric thread for diameters m 1. Mounting sae, rectangular, thru bolt standard specials on request.

For example, astm a490 allows for the production of astm a490m. Bs 3382, electroplated coatings on threaded components. Iso metric screw threads are designated by basic diameter and thread pitch. Head sizes may differ from what is shows due to differences between metric standards measure length from under the mm 10 20 30 40 50 60 70 80 90 100 head to the end of the bolt. The callout will look like a string of several numbers. Standard specification for anchor bolts, steel, 36, 55, and 105ksi yield strength.