Different types of aircraft bolts identification

images different types of aircraft bolts identification

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 Bolt Identification, Guide Table Engineers Edge
  • Nondestructive Inspection6 Radiography (XRay) Inspection
  • Aircraft Hardware, by Ron Alexander
  • Aircraft Bolts, Types, Identification and Coding _ RJworld Screw Steel

  • Aircraft Bolts, Types, Identification and Coding _ RJworld - Free download as PDF File In certain cases, aircraft manufacturers make special bolts of different.

    images different types of aircraft bolts identification

    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.

    images different types of aircraft bolts identification

    Within our industry the first two are the most common. Imagine trying to do that without a system of numbers.

    images different types of aircraft bolts identification
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    All fasteners are identified with a specification number and a series of letters and dashes identifying their size, type of material, etc.

    Nondestructive Inspection6 Radiography (XRay) Inspection

    CAUTION: Caution must be exercised in the use of close-tolerance bolts for all critical applications, such as landing gear, control systems, and helicopter rotary controls. A piece of welding rod or safety wire can be used to measure the length of the hole. These are all-purpose structural bolts used for general applications that require tension or shear loads. Add the friction drag torque to the desired torque.

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    Sampath Kumar.

    Describe the various types of rivets and fasteners and the cable and cable guides used in the Identify the various safety methods used for aircraft hardware.

    "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.

    images different types of aircraft bolts identification
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    The easiest method of installation is acquired by using safety wire pliers see Figure 6.

    I will tell you that an AN is a larger area flat washer used mainly for wood applications.

    Aircraft Bolts, Types, Identification and Coding _ RJworld Screw Steel

    Common steel bolts purchased from a hardware store are made of low carbon steel that has a low tensile strength usually in the neighborhood of 50, to 60, psi. Aircraft bolts may be identified by code markings on the bolt heads.

    They are manufactured in a regular thickness and a thinner thickness one half the thickness of regular.

    3 Replies to “Different types of aircraft bolts identification”
    1. Identification and Coding Bolts can be identified by the shape of the head, method of securing, material used in fabrication, or the expected usage.

    2. They also bend easily and have little corrosion protection. It shows fine thread and coarse thread series with a minimum and maximum torque limit in inch pounds.

    3. If chattering or a jerking motion occurs during final torque, back off the nut and retorque. Within our industry the first two are the most common.