Threaded Fastener Classes ME350= .Many different types of fasteners .Classification of fasteners are just as varied .Fasteners can be classified by >intended use >thread type >head style >strength 16
ME 350 16 Threaded Fastener Classes •Many different types of fasteners •Classification of fasteners are just as varied •Fasteners can be classified by ¾intended use ¾thread type ¾head style ¾strength
Threaded Fastener Classes ME350— .Fasteners can be made from a variety of materials including: >steel >stainless steel >aluminum >brass >bronze >plastics 17
ME 350 17 Threaded Fastener Classes •Fasteners can be made from a variety of materials including: ¾steel ¾stainless steel ¾aluminum ¾brass ¾bronze ¾plastics
Classification by intended use1 ME350= .A fastener is termed a Bolt >when it is intended to be used with a nut to clamp an assembly together.The bolt remains stationary while nut is torqued. .Machine screw >when it is threaded into a tapped hole rather than used with a nut.Screw is torqued into place. 18
ME 350 18 Classification by intended use 1 •A fastener is termed a •Bolt ¾when it is intended to be used with a nut to clamp an assembly together. The bolt remains stationary while nut is torqued. •Machine screw ¾when it is threaded into a tapped hole rather than used with a nut. Screw is torqued into place
Classification by intended use1 ME350- th)Elevator (c Countersunk d Plow Track Stud ·z)Stove (h)Stove ta)Camage bolt holt bolt bolt bolt bolt bolt boit (a)Hex bolt (b Cap screw Phtltps 32 .Counterunk .Round h Elliptcal head head head 19
ME 350 19 Classification by intended use 1
Classification by Thread Type2 ME350 .When a fastener must make their own hole/threads they are called >tapping screws BT OR 25 thread-forming T0R23 thread-cutting THREAD THREAD D OR 1 THREADS ACHINE AB SCREM SPACED THREADS 20
ME 350 20 Classification by Thread Type 2 •When a fastener must make their own hole/threads they are called ¾tapping screws ⁼ thread-forming ⁼ thread-cutting