Automotive Service Technician 1 - Industry Training Authority

Program Content
LINE (GAC): C TOOLS AND EQUIPMENT
Competency: C4 Use fasteners
Objectives
To be competent in this area, the individual must be able to:
Select threaded and non threaded fasteners.
Remove and replace fasteners.
Identify causes of fasteners failure.
Remove broken fasteners and repair threads.
LEARNING TASKS
CONTENT
1. Describe threaded fastener terminology Nominal sizes
Major and minor diameter
Head markings and tensile strength
Pitch and thread angle
Thread series
o Unified National Coarse (UNC)
o Unified National Fine (UNF)
o National Pipe Thread (NPT)
o Metric
Right and left hand threads
Classes or fits
2. Select and use threaded fasteners Fastener materials
Bolts
Studs
Nuts
o Hex
o Castle
o Slotted hex
o Self-locking
o Wing
o Speed
Self tapping screws
Sheet metal screws
Set screws
3. Torque fasteners to specifications Torque definition
Tension
Elastic limit
Distortion
Tensile strength
Torque wrenches
Automotive Service Technician 1 Industry Training Authority AST 1- 28
04/13