What do the letters mean on bolts?
The three-letter code is the manufacturer code (for example, HKT stands for Hau Kwang Enterprises) and the numbers (if metric) or radial lines (if SAE) refer to the bolts’ strength. If there are no numbers or lines present, assume the bolt is no better than a grade 2 (low strength).
How do you describe a bolt?
Definition of bolt
- 3 : a metal rod or pin for fastening objects together that usually has a head at one end and a screw thread at the other and is secured by a nut.
- 4 : a roll of cloth or wallpaper of specified length.
What does a 4 on a bolt mean?
if in fact you are in ernest… the term 4 bolt refers to the number of crank Main Bearing cap bolts at each main cap on the block, two bolt is standard construction, but for extra heavy duty, like big trucks and racing applications extra bolt bosses are cast into the block and the caps are built to accomodate two …
How do you read a bolt description?
How to Read Screw Sizes
- Read the first letter of the size. This the largest diameter: the measurement of the screw on the thread.
- Read the second number.
- Read the third number, generally the one following the “x.”
What is the difference between Grade 5 and Grade 8 bolts?
Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions. Grade 8 bolts have 6 evenly spaced radial lines on the head. Grade G is roughly equivalent to Grade 8.
What do the numbers mean on metric bolts?
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 the number means the stronger the bolt.
What are the different types of bolted connections?
A bolt is a metal pin with a head formed at one end and shank threaded at the other in order to receive a nut. On the basis of load transfer in the connection bolts are classified as: (a) Bearing Type (b) Friction Grip Type There are two types of bearing type bolts, namely, (i) Unfinished or Black Bolts. (ii) Finished or Turned Bolts.
What kind of bolts are in all size supply?
Contact All Size Supply Hex Bolts Carriage Bolts Structural Bolts Tap Bolts Lag Screws Flange Screws Plow Bolts Step Bolts Elevator Bolts Square Head Bolts Anchor Bolts Eye Bolts Toggle Bolts Hanger Bolt Stove Bolt
What are the two types of bolted joints?
Based on the service loads there are two types of bolted joints. In tensile joints the bolts are loaded parallel to the bolt axis as shown in Fig.1 while in shear joints the bolts are loaded predominantly perpendicular to the bolt axis as shown in Fig.2.
How are different types of nuts and bolts different?
In the type of locking, the friction between the mating threads of bolt and nut locks the nut. When the nut is tightened over a bolt, the lower flanks of the threads of the bolt will be in contact with the upper flanks of threads of the nut. When another nut is screwed down hard over the lower nut, it tends to pull the bolt through the lower nut.
A bolt is a metal pin with a head formed at one end and shank threaded at the other in order to receive a nut. On the basis of load transfer in the connection bolts are classified as: (a) Bearing Type (b) Friction Grip Type There are two types of bearing type bolts, namely, (i) Unfinished or Black Bolts. (ii) Finished or Turned Bolts.
How to identify the size of a bolt?
AN bolt nomenclature follows this format: ANd(H) – g(A) d is the bolt diameter (in sixteenths of an inch) H indicates that the head is drilled for safety wire (no H indicates undrilled head) g refers to the grip length* A indicates that the shank is NOT drilled for a cotter pin (no A indicates drilled shank)
What are the different grades of structural bolts?
Structural Bolts. This specification contains 4 inch series bolting grades: A325, F1852, A490, and F2280. These will be addressed in this article. When looking at the mechanical requirements of bolts it appears that a grade A325 and SAE J429 Grade 5 are identical as do the grade A490 and the SAE J429 Grade 8.
What kind of bolts are used for light duty?
About half the strength of medium-strength bolts, these Grade 2 bolts are for light duty fastening. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.