TASK 70-42-07-420-501 Projection Of Threads Through Nuts

DMC:V2500-00-70-42-07-00A-712A-D|Issue No:001.00|Issue Date:2013-03-20

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Description

  1. TASK 70-42-07-420-501 Projection Of Threads Through Nuts

    1. Minimum Thread Projection Through Nuts

      1. Control of the projection of an externally threaded bolt, screw, or stud through its nut is important.

        1. To get the thread to fully touch between parts.

        2. To make the maximum strength of the assembly.

        3. To make sure the lock property of a self-locking nut operates correctly.

      2. Thread projection must align the minimum conditions as shown in Figure. These conditions do not apply to slotted steel lock nuts.

    2. Figure: Minimum Thread Projection Necessary

    Minimum Thread Projection Necessary