These bolts have a shorter thread than bolts designed for torquing. Special high-strength nuts are used on these bolts. A piece of welding rod or safety wire can be used to measure the length of the hole. The importance of correct torque application cannot be overemphasized. If the hole and nut castellation do not align, change washer or nut and try again. The aircraft nuts you will most likely encounter are castle nuts, self-locking nuts, and plain nuts. Also, remember that plain washers are used under a lockwasher to prevent damage to a surface.
Aircraft Bolts, Types, Identification and Coding _ RJworld - Free download as PDF File In certain cases, aircraft manufacturers make special bolts of different.
In certain cases, aircraft manufacturers make bolts of different AN-type aircraft bolts can be identified by the code markings on the bolt heads. Aircraft hardware is identified for use by its specification number or trade name.
Video: Different types of aircraft bolts identification How to Measure and identify Bolts
Threaded The illustration below, depicts typical and common aircraft (AN and NAS) type bolts and their identifying markings. Aircraft Bolt All rights reserved.
The dash number following the AN or AN indicates the size bolt that the nut fits.
Aircraft Bolt Identification, Guide Table Engineers Edge
In Dural material, a special heat-treated washer must be used to provide an adequate bearing surface for the head. Be sure you do not overtwist the wire - doing so will weaken the safety wire. Am example might be a clevis bolt used in a control cable application.
The slots in the nut accommodate a cotter pin for safetying purposes.
Within our industry the first two are the most common. Imagine trying to do that without a system of numbers.
"Aircraft hardware is the term used to describe the various types of fasteners and All fasteners are identified with a specification number and a series of letters. As it is important to use the correct AN type bolt with the correct length we present a table for you to check if the correct bolt is used.
The most common method of locking is derived from a fiber insert.
AN is the designation used for a plain hex nut.
Aircraft Hardware, by Ron Alexander
This brings us to an example of a cross-reference MS number. The dash numbers indicate diameter and length of the pin. The importance of correct torque application cannot be overemphasized.
Castle nuts are fabricated from steel and are cadmium plated.