A screw and a bolt (see Differentiation between bo...

side size grip hand wood bolts A nut torque spanner reasons tapping Loctite variety plastic fastener jam nuts leverage rotation lockwire vibration nyloc nut threading materials bolt heads split pins engagement preference situations compression many screws conjunction combination mating bolt sheet metal safety pins Square nuts first shape screw thread applications lock washers two partners nylon inserts threaded hole matching part helical ridge similar types maximum amount greater length multiple parts hexagonal nuts internal thread Differentiation external thread castellated nuts threads' friction slight stretching larger surface area oval-shaped threads similar female thread eccentric double nuts slight elastic deformation various locking mechanisms specialist adhesive thread-locking fluid