What are the different size bolts?

What are the different size bolts?

Bolt Grade Markings 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.

What are the different kinds of aircraft bolts?

AN bolts come in three head styles—hex head, clevis, and eyebolt. [Figure 5-19] NAS bolts are available in hex head, internal wrenching, and countersunk head styles. MS bolts come in hex head and internal wrenching styles.

How are aircraft bolts measured?

The length of AN aircraft bolts is measured from under the head to the end of the shank. The “grip” is the unthreaded portion of the shank. See table for conversion of length and/or grip to proper AN call-out.

What kind of bolt is typically used in aircraft structure?

Aerospace Bolts
– Aerospace Bolts: most bolts used in aircraft structures are typically general purpose, AN bolts, NAS internal wrenching or close tolerance bolts, or MS bolts, they can be fabricated from cadmium or zinc plated corrosion resistant steel, unplated corrosion-resistant steel, and anodized aluminum alloys.

What does a #8 screw mean?

threads per inch
Their size is described as diameter, number of threads per inch (if used with a nut or in a threaded hole), and length in inches. In all cases, the larger the number, the larger the size. Consequently a #8 screw is larger than a #4 screw, just as a 3 inch bolt is larger than a 2 inch bolt.

What grade are aircraft bolts?

Aircraft (aerospace) vs Commercial grade fasteners If we just take aircraft bolts as an example; these are made from corrosion resistant steel and are heat treated to exceed a tensile strength of 125,000 psi. Commercial grade fasteners, by contrast, are made using low carbon steel.

How many bolts does a 747 have?

A modern Boeing 747 uses over 6 million individual parts in its construction. Of those parts, approximately 3 million are fasteners.

What size is an AN4 bolt?

1/4-
AN4 bolts have a 1/4-28 UNF thread. All sizes of AN4 bolts have a 0.469 inch thread length (except AN4-3A, which has 0.406 inch thread length).

What increments are aircraft bolts diameters measured in?

The bolt diameter is measured in 1/16-inch increments. NAS bolts are used for airplane construction.

What is the difference between 8.8 and 10.9 bolts?

Class 10.9 is stronger than class 8.8. It is commonly found in high strength automotive applications. Class 10.9 is similar to grade 8.

How can I find out the size of a aircraft bolt?

Additional information, such as bolt diameter, bolt length, and grip length may be obtained from the bolt part number. For example, in the bolt part number AN3DD5A, the “AN” designates that it is an Air Force-Navy Standard bolt, the “3” indicates the diameter in sixteenths of an inch (3/16), the “DD” indicates the material is 2024 aluminum alloy.

What kind of steel are aircraft bolts made of?

Aircraft bolts are fabricated from cadmium or zinc plated corrosion resistant steel, unplated corrosion resistant steel, and anodized aluminum alloys.

What are the different types of NAS bolts?

AN bolts come in three head styles – hex head, clevis, and eyebolt (see figure 6-1). NAS bolts are available in hex head, internal wrenching, and countersunk head styles. MS bolts come in hex head and internal wrenching styles.

What’s the difference between AN-73 and An-3 bolts?

The AN-73 drilled head bolt is similar to the standard hex bolt, but has a deeper head which is drilled to receive wire for safetying. The AN-3 and the AN-73 series bolts are interchangeable, for all practical purposes, from the standpoint of tension and shear strengths.