Standard Screw Sizes . The use of fasteners has grown extensively worldwide, increasing the need for standard sizing. Standardization prevents the use of improper screws , and ensures screws herepatible with the materials being used and are appropriate for the project at hand. Screw dimensions include the driver type -- such as flat, How to Size Machine Screws By Finn McCuhil. eHow Pin . These edges are designed to match the thread pitch and depth for standard machine screws . Hold the screw in one hand while trying the edge of your thread gauge against the screw with your other hand. Again, these tolerances will be close, especially on smaller screws . How to Figure out Screwdriver Size ; . By eHow Home Garden Editor. eHow . Measure your standard blade screw head slot. You'll want to use a tape measure to determine how long the slot is and how wide it is. If you use a screwdriver that's too wide and too thick, you won't be able to fit your screwdriver in the slot.
Standard Hex Nut Dimensions. Hex nuts and bolts join parts together and are mated in size (metric or standard ), hole diameter and thread pitch as well as width and thickness. The hex nut corner angles prevent rounding off during the tightening process. Dimensions of Metric Bolts. Although by their very nature, the exact dimensions of metric fasteners vary with the size needed for the job, How to Read Screw Sizes By Jess Kroll. SAVE; Screw sizes are written in an alphanumeric code that can be difficult to decipher if you're not familiar with the system. 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.