{ The minimum length of thread shall be equal to 1/2 the nominal screw length plus .50 inches, or 5.00 inches, whichever is shorter. | Contact. A full-bodied bolt with hex head, spaced threads and a gimlet point. Drive the pointed tip of these screws into soft material, such as wood and drywall. Made from steel, they are strong and wear resistant, and have a zinc plating to protect the steel from rust in wet environments. A corrosion resistant steel alloy. A number 4 screw is much smaller than a number 12 screw. Boltmasters reputation is for quality, service and innovation of Bolts & Fasteners. Steel: AISI 1006-1022 or equivalent steel. The size of the head varies with the size of the lag … The range of the screw sizes is from a small size (121/2) to a large size (2). Screw sizes as marked on the lable of most products. Size for size they are stronger than the coarse thread versions "in tension" as there is a larger stress (contact) area. Measure length from under the head to the threaded end of the bolt. What size pilot hole to drill in timber substrates for the best screw grip. At the same time, lag screw pilot holes are definitely closer in size … document.write(' ') Disclaimer This table is the chart for publication of information of metric machine screws, along with tap and clearance drill information. For nuts, size will appear as diameter and pitch. Excel App. { The important thing here is that you need to print them out at actual size. ANSI B18.2.3.8M–1981, R1991 Your shopping cart is empty. Any 2 inch long lag or even screw will be more than enough. document.write('') | Feedback | Advertising The size of a metric screw or bolt is specified as diameter, pitch and length, in millimeters (millimeters is abbreviated "mm"). Lag Screws: Performance & Mechanical Specs; Description. Here's what the description means… Available in metric sizes, these screws have a tip that is harder than nylon and silver to provide a secure hold on hard surfaces. ing the design and installation of standard lag screws. * Click on the basic product diameter to find products. Measure in mms from where the screw head sits to the tip to get the length. The chart below can be used to identify commonly accepted hole sizes. Engineering Videos Metric Alloy Steel A full-bodied bolt with hex head, spaced threads and a gimlet point. Metric and Imperial Wood Screw Size Equivalents Metric and Imperial size comparisons for wood screws Metric Bolt Head and Wrench Size - ANSI/SO, DIN and JIS bolts Metric Threads - Clearance Holes and Tapping Drill Sizes - Recommended clearance holes and drill tap sizes UNC and UNF - Unified Inch Screw Threads - ANSI/ASME B1.1 Unified National Thread - UNC Coarse series and UNF Fine series Engineering Book Store > Lag Screws > Steel / Zinc; Lag Screws Filter. Metric Nuts Choose from metric hex, flange and lock nuts with coarse or fine thread. Handy chart for converting metric screw sizes to imperial. Applications: Steel, Electro-plated Zinc: For use in wood in non-corrosive environments Steel, Hot-dip Galvanized: For use in corrosive environments Stainless Steel: Has superior corrosion resistance to galvanized steel bolts. Home Advertising Center The Bolt Depot has some excellent charts that you can print off for both imperial and metric fasteners, as well as nuts and washers. Online Books & Manuals Screw sizes are written in an odd looking code. Steel, Electro-plated Zinc: For use in wood in non-corrosive environments, Steel, Hot-dip Galvanized: For use in corrosive environments. Downloads } Start measuring from wherever the screw head would rest on the surface when it is fully screwed in. All rights reserved. The larger the diameter, the smaller the screw. document.write(''); Step 3 - Determine the Diameter . Although 7/16" is detailed in the ASME standard, that size is not commonly available. It is, after all, only a 12 inch wide shelf. Featuring a hex head, spaced threads and a gimlet point, lag screws are generally used in pre-drilled holes in wood, or with lag screw … Metric washer sizes … Sequences like "4-30 x .10," "1/8-10 x 4/6" and "M5-.4 x 15" may seem meaningless, but they say a lot, and you need the right screw to do the job. Fine pitch variant screws have some distinct advantages over their coarse pitch counterparts. Featuring a hex head, spaced threads and a gimlet point, lag screws are used in pre-drilled holes in wood, or with lag screw shields in a variety of materials. Metric Washers Metric flat and lock washers grade 8.8 and 10.9. // -->, GD&T Training Geometric Dimensioning Tolerancing. Trying to make sense of all the different screw and bolt thread lengths can be a real challenge—even for the most knowledgeable of professionals. Take into account the type of screw head when you are measuring, because different screw heads rest differently on surfaces. Lag bolts; Hex head. Engineering Toolbox First is the Gauge of the screw which refers to the diameter – the larger the number, the larger the diameter. Stainless: The austenitic alloys develop their strength through work hardening during the fastener manufacturing process, as seen from the hardness properties below.