What do the numbers on bolts mean?
There are several grades of bolts but the three common grades for SAE are 2, 5 and 8. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. Each grade has a specific bolt strength. No matter the system used to grade the bolts, the higher number means the stronger the bolt.
How much can a bolt hold?
For example, an eye bolt with a 1/4 inch shank can typically hold up to 600 pounds at a straight pull (no angle). However, at a 15 degree angle, the maximum weight capacity drops to 480 pounds (80% of the “straight pull” weight capacity).
What does a 6/32 screw mean?
#6-32 UNC screw The #6-32 UNC is a UTS screw specifying a major thread diameter of #6 which is defined as 0.1380 inches (3.51 mm); and 32 tpi (threads per inch) which equates to a thread pitch of 0.031250 inches (0.7938 mm). It is by far the most common screw found inside computer cases.
How many pounds can a Grade 5 bolt hold?
A single 1/4″ Grade 5 lag bolt, in a configuration like this, will fail at roughly 13,000 lbs. Even 1/8″ lag screws (well down into “numbered” screw sizes) will have a shear strength of over 3,000 pounds.
How much weight will a 5/16 bolt hold?
If a lag screw with a 5/16-inch shaft is installed correctly, it can withstand pull-out, or withdrawal, of up to 212 pounds in close-grain hem, fir and redwood, and up to 266 pounds in larch Douglas fir, according to information from the American Wood Council.
Which is part of a bolt is called out?
AN bolts are called out by grip length, and they have shorter threads. Grip refers to the unthreaded portion of the shank. This is the portion of the bolt that should bear against the inside of the hole. The threaded portion is not as strong as the shank in shear and does not present a good bearing surface for the parts being bolted together.
Is the thread length of a bolt constant?
The threaded portion is not as strong as the shank in shear and does not present a good bearing surface for the parts being bolted together. Under vibration or movement, the threads can damage the hole. Thread Length is constant for each bolt diameter.
Which is the correct size for a bolt?
AN bolt nomenclature follows this format: ANd(H) – g(A) Examples: * Note: A popular misconception is that the dash number gives the shank length in full inches plus eighths of an inch (-15 would mean 1 5/8″ shank length).
Where can I find the correct dash number for a bolt?
Each dash number specifies a different length for different bolt diameters. You must refer to a size chart or AN bolt gauge to find the correct dash number. The bolt grip length charts linked below are especially handy when replacing non-AN bolts.
Which is part of a bolt accommodates a nut?
Shank is partially threaded (as shown in figure) to accommodate a nut. Grip length: It is the part of bolt that accommodates the parts which are to be assembled. Grip length should be equal to the combined thickness of joining parts. Thread length: It is the part of bolt that accommodates the nut.
How are the parts of a bolt divided?
As shown in above diagram a bolt can be divided into following parts. Head: It is the part of a bolt from where a spanner can hold it (to make it tight or loose). Shank: A bolt can be broadly divided into two parts head and shank. Shank is partially threaded (as shown in figure) to accommodate a nut.
When is there place available for bolt head and nut?
When there is a place available for bolt head and nut. When there is a place available for spanner. Screws are cheaper compared to bolts. Bolts are good for frequent dismantling and reassembling, unlike screws. Parts of Bolt: By Mikael Häggström – Own workAnnotations: W. E. Johns.
What is the nominal length of a bolt?
Thread length: It is the part of bolt that accommodates the nut. Nominal length: It is the sum of thread length and grip length (as shown in figure). Plastic Bolts: They are inexpensive and corrosion resistant. They are generally used for light loads.