XtremeAIR XA41, Maintenance Manual

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Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
Page 2 Page date:
Chapter 20 25.09.2018
WARNING
20-00-00 GENERAL
This chapter contains data about standard threaded fasteners.
Always tighten the nut or bolt to the torque shown in chapters 20-10-02 and 20-10-03
unless other instructions are applicable.
Always use the correct locking device for the nut or the bolt.
Discard the self-locking nuts after removal, because they have a decreased friction torque.
Obey the special torque and locking procedures for all bolt connections. Loose connections
can cause injury to persons and/or damage to material.
20-10-00 STANDARD PRACTICES - AIRFRAME
20-10-01 Types of Bolts
Applicable bolts for the aircraft are:
• LN Bolts (“Luftfahrt Norm”)
• AN Bolts (“Army/Navy”
• DIN Bolts (“Deutsche Industrie Norm”)
The marks on the bolt head identify the types of bolts. The table below shows the
identification.
Table: Types of Bolts
LN-Bolts AN- Bolts DIN- Bolts
Head
identification
Marks on
head
Manufacturer
identification (H, L, …)
LN Specification (9037,
9355) Manufacturer
identification (C, F, …)
Alloy Steel (X) Manufacturer
identification (AB, …)
Property class (8.8, 12.9)
Example
LN9355-06026
LN9355 specification
06 - M6 thread
026- length in mm
AN4-10A
4 - bolt diameter 4/16”
10 - length 10/8”
A - hole location
DIN931 M4x10 8.8
DIN 931 specification
M4 thread 10 - length in
mm
8.8 - property class
H
9037
X
F
S
AB
12.9