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.
The outside diameter of a pipe is one of the most important measurements used when identifying pipe, selecting fittings, designing piping systems, and determining compatibility between different components. A pipe’s outside diameter (OD) is the distance measured straight across the outside of the pipe from one outer surface to the opposite outer surface. One important … Read more
Bearings are identified using standardized numbers, letters, and suffixes that describe important characteristics such as bearing type, bore size, dimensions, internal clearance, sealing arrangement, and other design features. Understanding a bearing number makes it much easier to identify a replacement bearing, compare different bearing models, determine bore size, and select the correct component for a … Read more
Threads are an essential part of bolts, screws, nuts, studs, threaded rods, machine fasteners, pipe fittings, and other mechanical components. When working with inch-based fasteners, one of the most important measurements is threads per inch, commonly abbreviated as TPI. Threads per inch tells you how many thread peaks or thread intervals are present along one … Read more
Threads are one of the most important parts of bolts, nuts, screws, studs, threaded rods, fittings, and other mechanical fasteners. When working with imperial or inch-based fasteners, thread identification often depends on TPI, which means Threads Per Inch. TPI tells you how many complete thread peaks are present within one inch of thread length. For … Read more
Understanding bolt diameter is essential when selecting the correct fastener for construction, automotive repairs, machinery, fabrication, furniture, equipment, and general mechanical applications. The diameter determines the basic size of the bolt and must match the corresponding nut, threaded hole, washer, and application requirements. Bolt diameters are commonly specified in millimeters for metric fasteners and in … Read more
Pipe schedule is an important part of pipe sizing because it identifies the wall thickness of many standardized pipes. The nominal pipe size alone does not tell you the actual wall thickness or inside diameter. A single nominal pipe size can be manufactured with several different schedules, resulting in different internal diameters, weights, and pressure … Read more
Understanding thread sizes is essential when selecting bolts, nuts, screws, threaded rods, taps, dies, fittings, and other threaded components. A thread that looks similar may have a different diameter, pitch, thread angle, or measurement system, making it incompatible with the mating part. Thread specifications are commonly divided into metric and imperial systems. Metric threads are … Read more
Understanding bolt diameter is essential when selecting fasteners for automotive repairs, machinery, construction projects, structural assemblies, and general maintenance. The correct bolt diameter affects strength, fit, thread compatibility, washer selection, nut size, and the overall reliability of a bolted connection. A bolt may look suitable simply because it passes through a hole, but choosing the … Read more
A bolt dimensions chart helps you quickly identify the correct bolt size, diameter, length, thread pitch, head dimensions, and other important measurements required for fastening applications. Whether you are working on automotive repairs, machinery, construction projects, mechanical equipment, or general hardware, understanding bolt dimensions makes it easier to select the right fastener. Bolts are available … Read more
A metric bolt size chart is a useful reference for identifying metric bolt diameters, thread pitches, head dimensions, and common bolt sizes. Metric bolts are widely used in automotive, mechanical, construction, manufacturing, machinery, furniture, and general hardware applications. Unlike imperial bolts, which are measured in inches, metric bolts are identified primarily by measurements in millimeters. … Read more
