A bolt are a fastener that must fit into a matching hole to function correct, but a bolt will fail if the bolt dont match the specific dimension of the hole. If you force a bolt into a hole that does not match the bolt, the thread will cross-thread, and cross-threading will ruin the bolt and the hole. Many people believes that any bolt of a similar size will work, but a bolt must have a matching pitch to work with a specific hole.
The pitch is the distance between the threads on a bolt, and the pitch must be identical to the pitch of the hole for the bolt to thread proper. The dimensions of a bolt involve several specific measurement that determine how the bolt fit into a hole. The major diameter is the measurement of the thickness of the bolt shaft, but the thickness of the bolt shaft isnt the only measurement that matter.
Check Bolt Size and Thread Pitch
The minor diameter is the measurement of the depth of the valleys between the threads, and the minor diameter is also an important measurement. The pitch diameter is the measurement of the middle area where the ridges of the bolt and the grooves of the hole lock together, and the pitch diameter is the most important measurement for ensuring the bolt fit. If the pitch diameter of the bolt does not match the pitch diameter of the hole, the bolt will not fit, and the bolt will not provide strength.
There is different types of bolt threads, and you must identify the specific type of bolt thread before you attempt to use a bolt. Unified National Coarse (UNC) threads are a type of bolt thread that has a coarse spacing between the threads, and UNC threads is easy to assemble because the coarse spacing makes UNC threads less likely to cross-thread. Unified National Fine (UNF) threads are a type of bolt thread that has more threads per inch than UNC threads, and the fine threads create a tighter grip in areas with high vibration because people use UNF threads.
Metric threads are a type of bolt thread that use a different measurement system than inch-based threads, and you must never mix metric threads with inch-based threads because metric threads and inch-based threads is not compatible. You should not guess which bolt is the correct bolt, because guessing often leads to the use of the wrong bolt. For example, an M10 bolt and a 3/8-inch bolt may look similar in size, but an M10 bolt and a 3/8-inch bolt has different diameters and different pitches.
You must use a gauge to verify the diameter of the bolt and the pitch of the bolt. Using a gauge allow you to confirm that the diameter of the bolt match the diameter of the hole and that the pitch of the bolt match the pitch of the hole. Verifying the diameter and the pitch with a gauge will prevent you from damaging a part, and verifying the diameter and the pitch with a gauge will ensure that the bolt fit correctly.
You should of checked the bolts length before starting. There are alot of ways to misidentify a bolt and its diameter.
