Length of a cap screw is measured from the underhead bearing surface to the extreme end of the screw. Metric socket countersunk head screws din 7991 bs 4168 iso 10642 materials and finishes steel 10. To meet the increasing demand for fine thread socket head cap screws, we have added many sizes from m8 x 1 through m20 x 1. Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than m3 nor larger than. There is a hex socket in the head that accepts a hex wrench to tighten the socket cap screw. Nonstock diameter torque calculated to induce 420 mpa in the screw. Din 7991a2a4 iso 10642 flat head countersunk socket. Metric socket hd cap screw dimensions west coast fasteners. Socket head cap screw metric grade 316 products stainless socket screws socket head cap screw metric socket head cap screw metric grade 316.
Metric cap screws are available in quality grade a2 stainless steel. M5 x mm cap head hexagon socket drive screw in grade 12. Allen hex socket drive is a sixsided recess for use with an allen wrench hex key. Din 931a2a4 iso 4014 hex head cap screw part thread. Drill and counterbore sizes for socket head cap screws per. The basic thread lengths lt listed directly below the nominal sizes in the table above represents the nominal length up to which all screws of that diameter shall be fully threaded. It is made of stainless steel, carbon steel or alloy steel making it corrosion resistant. For partially threaded screws, manufacturing standards allow thread lengths to vary between the minimums and maximums listed in the tables below. It is made of stainless steel, carbon steel or alloy steel making it. Threads will vary according to the individual bolt sizes and dimensions.
The above specification is for coarse threads only. Plain finish metric socket cap screws with hex drive and coarse thread. The m3 and m4 nominal screw sizes have two drilled holes spaced 180 degrees apart. This chart contains information on number, metric and fractional number socket head cap screws, along with tap drill information. Metric socket cap smooth socket caps have a small cylindrical head with tall vertical sides. Din 933a2a4 iso 4017 hex head cap screw full thread. Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than m3 nor larger than m36. The above are types of screws with a cylindrical head and an internal hexagonal drive. Socket caps have a small cylindrical head with tall vertical sides. If all else fails, you may want to use our drill size conversion table or our tap drill size calculator. Socket head cap screws from ita fasteners comply with the strictest industry standards for durability and strength.
All data is correct to the best of our knowledge, however tr cannot be held responsible for any errors or omissions. They are not suggested for use in critical high strength applications where socket head cap screws should be used. Button head socket cap screw dimensions screws may be fully or partially threaded. Stainless steel 188 a2 also known as a2 stainless, 188 is the most common grade of stainless steel for general use. Apr 04, 2016 nas51 datasheet pdf socket head cap screw. Lb is the minimum body length and is the length of the unthreaded cylindrical portion of the shank. Because the screws are internally wrenched, they require less surface area and are thus ideal for projects where there is insufficient space for traditional wrenches or sockets. Holokrome socket head cap screws contribute in important ways in carrying out modern design techniques which call for smooth contours and surfaces, elimination of clumsy, bulky parts and use of lighter constructions as they apply to flanges, lugs, pockets, and cover plates. Grade5 cap screws shall be heat treated, oil or water quenched, at the option of the manufacturer, and tempered at a minimum. Metric socket head cap screws din 912 bs 4168 iso 4762 materials and finishes steel 12. Metric, socket head cap screws, iso 4762, class 10. The most common standard socket cap screw is to din 912 in 12. To determine the threaded portion of the screws with a nominal length greater. Tension on the socket cap screw is induced by rotation of the screw head.
Flat head socket cap screw dimensions thread lengths screws may be fully or partially threaded. Full dimensional tables including product photographs and drawings are available by clicking on the item. Lengths in shaded areas or shorter are threaded to the head nominal size nominal length m12 lg lb m16 lg lb m20 lg lb m24 lg lb 20 25 30 35 40 45 50 55. For partially threaded screws, manufacturing standards allow thread lengths to vary between the mini. Service manual supplement july 2016 fastener torque specifications 4 sae and metric fastener torque specifications sae plain and zinc plated hex and socket head cap.
Socket head cap screws are a headed and externally threaded part designed for insertion. Metric captive socket head cap screw for retainer washers see page 147. Din 912 technical data metric screw and tool company. Socket head cap screws metric body and grip lengths. Dimensions mechanical properties application data iso 4762 din 912 hexagon socket head cap screws various sems washer is available, r.
Counterbored hole dimensions for metric socket head cap screws. Yieldtotensile ratio is the lowest of all heat treated steels. Metric socket head cap screws size table engineers edge. Suggested seating torque values, only apply to metric grade 12. We offer metric socket head screws, metric button cap screws, and metric flat socket cap screws. Unbrako socket cap screws offer resistance to a greater degree than any other threaded fasteners you can purchase offtheshelf. A socket cap screw is a type of cap screw with a cylindrical head and hexagonal allen drive hole. Bo metric, socket head cap screws, iso 4762, class 10.