Accurate measurements are essential for mechanical, industrial, automotive, home, and sports projects. Our Size Charts category provides clear, high-quality reference guides for bolts, screws, threads, wires, pipes, bearings, automotive components, home appliances, sports equipment, hardware tools, and more. Developed by experienced engineers with over 10 years in measurement systems and dimensional analysis, these charts ensure precision, efficiency, and confidence in every task. Whether you are working on CNC machining, fabrication, repairs, or DIY projects, our size charts are a trusted resource—helping readers select the right components, compare metric and imperial units, avoid errors, and save valuable time.
A flange PCD chart is used to identify the Pitch Circle Diameter (PCD) of pipe flanges. PCD is one of the most important flange dimensions because it determines the position of the bolt holes around the flange. It is also commonly called Bolt Circle Diameter (BCD). When selecting, replacing, or identifying a flange, knowing the … Read more
An imperial bolt size chart is a useful reference for identifying bolts measured using the inch-based system. Imperial bolts are commonly used in the United States, Canada, older machinery, automotive equipment, industrial systems, construction, agricultural machinery, and mechanical applications. Unlike metric bolts, which are identified using millimeters, imperial bolts are generally identified using inches, fractions, … Read more
A flange dimensions chart provides the measurements needed to identify, select, compare, and install pipe flanges correctly. Flanges are widely used in plumbing, water treatment, chemical processing, oil and gas, HVAC, power plants, manufacturing, and industrial piping systems. Unlike a simple pipe size chart, a flange dimensions chart contains several measurements, including nominal pipe size, … Read more
A flange size chart is an important reference for identifying flange dimensions, nominal pipe size, flange outside diameter, bolt circle diameter, bolt hole diameter, number of bolt holes, flange thickness, and bore diameter. Flanges are widely used in piping, plumbing, water treatment, oil and gas, chemical processing, HVAC, power generation, and industrial systems. Choosing the … Read more
A pipe size chart is an essential reference for identifying pipe dimensions, nominal pipe size, outside diameter, wall thickness, inside diameter, and common pipe standards. Pipes are used in plumbing, water supply, drainage, HVAC systems, oil and gas, industrial processing, fire protection, irrigation, and many other applications. One of the most confusing aspects of pipe … Read more
A metric nut size chart is a useful reference for identifying nuts by their metric thread size, nominal diameter, and corresponding wrench or spanner size. Metric nuts are commonly used with metric bolts, screws, and threaded studs in automotive, mechanical, construction, manufacturing, plumbing, and DIY applications. Understanding metric nut sizes makes it easier to select … Read more
A nut size chart helps you quickly identify the correct nut for a metric or standard bolt by comparing nut size, thread diameter, thread pitch, wrench size, and thread type. Nuts are available in many sizes and designs, including hex nuts, lock nuts, flange nuts, wing nuts, and heavy hex nuts. Choosing the correct nut … Read more
A standard bolt size chart is a useful reference for identifying common inch-based bolt sizes, diameters, thread counts, and related dimensions. Standard bolts are widely used in automotive repair, machinery, construction, manufacturing, maintenance, woodworking, and general hardware applications. Unlike metric bolts, which are identified using millimeters and the M designation, standard or inch bolts are … Read more
A nut dimensions chart is an essential reference for identifying and selecting the correct nut for a bolt, screw, stud, or threaded rod. Nuts are available in many sizes, shapes, materials, thicknesses, and standards. Although the basic purpose of a nut is simple, its dimensions can vary significantly depending on the nut type and specification. … Read more
Retaining rings are small but essential mechanical components used to secure parts on shafts, axles, and inside housings. They prevent unwanted movement and help maintain the correct position of bearings, gears, pins, and other rotating or stationary components. Choosing the correct retaining ring size is important because an incorrectly sized ring can fail under pressure, … Read more
