Engineering Fasteners

We name the group of Joining methods that can be undone without destroying the material or joint_______________

• Non Permanent

• Permanent

Tick all permanent joining methods

• Pop Rivet

• Nut and bolt

• Solid rivet

• Self tapping screw

Why do we use a washer under a nut ?

• To make it thicker

• To protect the joined material from damage

• To make it easier to tighten

Tick all of the reasons for using a pop rivet

• You can only access one side of joint

• I need a very strong joint

• I need to be able to easily undo it

• I need a reasonably strong permanent joint

Tick all of the reasons for bolting a joint

• I can access both sides of joint

• I want a permanent joint

• I want a non permanent joint

• I want a very strong joint

Tick the best choice for 'High strength, permanent join of 2 overlapping steel plates. You can access to both sides of joint

• Machine screw

• Pop rivet

• Nut and bolt

• large solid rivet

• Self tapping screw

Tick the best choice for 'Low strength, non-permanent join of 2 overlapping steel sheets. You can access only one side of joint

• Machine screw

• Pop rivet

• Nut and bolt

• large solid rivet

• Self tapping screw

Tick the best choice for 'medium strength, permanent join of 2 overlapping steel sheets. You can access only one side of joint

• Machine screw

• Pop rivet

• Nut and bolt

• Self tapping screw

• Solid Rivet

Tick the best choice for 'low strength, non-permanent join of 2 overlapping aluminium sheets. You can access both sides of the joint

• Machine screw

• Pop rivet

• Nut and bolt

• Self tapping screw

• Solid Rivet

Why use a 'Nyloc' nut ?

• It looks fancy

• It has a plastic lock ring inside to stop nut coming loose during vibration

• They are for very high strength applications only

• Makes join waterproof.