joining metal using fittings and adhesives Flashcards
what type of screws are there
self tapping screws
wood screws
machine screws
different head patterns
what do self tapping screws do
cut their own thread
what do self tapping screws require
plain hole before use
what is self tapping screws used on
metal
plastic
what do self tapping screws usually have
coarse thread and a tapering diameter
what are wood screws a form of
self tapping screws
what does a wood screw require
pilot hole
a clearance for the shank
possible a countersink
ehat is a machine screw used for
metal objectives / plastic
what does machine screws rely on
the hole into which they are beign inserted having a thread cut internally
what is the typical diameter of a machine screw
2mm-20mm
what have dive systems been applied to do
develop greater torque to be applied to the screw
what do bolts have
plain shank between the head and the thread
how does a bolt work
a bolt is inserted into a hole that is slightly larger than itself and the screw threads are secured into a nut, with a washer in between
what can nuts be
plain hexagonal, locking nuts / wing nuts - allows the joint to be tightened witout tools
do do washers help with
help to prevent damage to the components being joined
what are the drawbacks of using riverts
both sides of the joint need to be accessed
what od pop riverts consist of
a hollow alluminium alloy rivert and steel pin
