Nuts and bolts are used together as fasteners in various hobby, vehicle and household projects. The nut, or a washer _ which is flatter than a nut _ holds the bolt tight. There are common bolt types for specific applications, according to www.jb-bolt.com
Carriage bolts: Used for woodworking projects when you don’t want a protruding fastener
Stove bolt: General fastener with slotted heads and threaded bodies
Machine/Hex bolts: Also a general fastener used with ratchets and wrenches
J-bolts, U-bolts and eyebolts: Used as hooks
There are also various nuts, and washers, that you can get to know, according to www.jb-bolt.com
Lock nut: Has a hex head and threaded to prevent loosening up
Wing nut: Used if you’re removing and replacing frequently because the nut can be removed by hand
Hex or square nut: Most common nut with square or hex-shaped head
Flat washer: Common washer to prevent leaking from bolted part
Lock washer: Has teeth for gripping bolt
Nuts and bolts come in strong materials and different grades, according to www.jb-bolt.com
Stainless steel: Most costly but won’t corrode; steel-plated are best for outdoor use
Galvanized: Coated in zinc to resist corrosion
Grade 8 bolts: Hardened for extreme strength and safety
Grade 5 bolts: Not as strong as grade 8 bolts; suitable for indoor use