Fasteners

Fasteners are used to fix different objects together. For other types of fasteners not listed, go to http://www.mcmaster.com

Hex Nuts
General Purpose Fastening

Lock Nuts*
Nylon insert grips teeth to prevent loosening Can only be reused a few times Available in various types

Slotted Lock Nuts (Castle Nuts)*
Light duty locking applications Secured using a cotter pin through a hole in a bolt

Flange Nuts*
Flange distributes load over a larger surface area

Tee Nuts*
Use to fasten wood or soft materials using steel bolts

Flat Washer
General Purpose Fastening Spreads load over a larger surface area

Lock Washer, Spring (Split Lock)
Prevents bolts from loosening under vibrations

Lock Washer, Star (Tooth Lock)
Prevents bolts from loosening under vibrations Use when bolt head can come into contact with the teeth

Dowel Pin
Use for alignment of machine components Alternate use as a guide for machine parts

Spring Pin, Slotted
Slot is pressed close when inserted No flex after installation

Spring Pin, Coiled (Roll Pin)
Absorb shock and vibration after installation Higher load capacity than slotted spring pins

Cotter Pin
Used to hold assemblies, such as bolts and nuts, together Use with a slotted lock nut

Taper Pin*
Use to position components and secure assemblies

Rivets
Permanently hold two pieces of material together Punch through a pre-drilled hole

* Not available in the machine shop

Pictures and descriptions derived from McMaster-Carr

Useful links: (link to tapping wiki)