FASTENER TYPES





 
Wood Screw
Screws with a smooth shank and tapered point for use in wood.
 
Machine / Metal Thread Screw
Screws with threads for use with a nut or tapped hole.
 
Sheet Metal Screw
Full thread, pointed,         used in sheet metal.
 
 

 
Hex Bolt / Set Screw
Bolts with a hexagonal head with threads for use with a nut or tapped hole.
 
Coach Bolt
Bolts with a smooth rounded head that has a small square section underneath.
Tek Screw
A Sheet metal screw with a self drilling point.

 
 
Socket Head
Socket Flat Head
 
Wire Eye Bolt
Shoulder Eye Bolt
 

 
U-Bolt
Socket Screw
Socket screws, also known as Allen head are fastened with a hex Allen wrench.
Eye Bolt
A bolt with a circular ring on the head end. Used for attaching rope or chain.

Coach Screw
Bolts with a wood thread
and pointed tip.

U-Bolt
Bolts in U shape for attaching to pipe or other round surfaces. Also available with a square bend.
J-Bolt Hanger Bolt Wire Eye LagForged Eye Lag   
J-Bolt
J shaped bolts are used for tie-downs or as an open eye bolt.
Lag Screw
Hanger bolts have wood thread on one end and machine thread on the other end.
Screw Eye
Similar to an eye bolt but with wood threads instead of machine thread.
 
Grub screw
Machine screws with no head for screwing all the way into threaded holes.
 

Head Styles

Flat HeadFlat Head Profile Oval HeadOval Head Profile Pan HeadPan Head Profile Truss HeadTruss Head Profile
Countersunk
A countersunk head with a flat top.
 
Raised
A countersunk head with a rounded top.
 
Pan
A slightly rounded head with short vertical sides.
 
Mush
An extra wide head with a rounded top.
 
Round HeadRound Head Profile Hex HeadHex Head Profile Hex Washer HeadHex Washer Head Profile Slotted Hex HeadSlotted Hex Head Profile
Round
A domed head.
 
Hex
A hexagonal Head.
 
Hex Washer
A hex head with built
in washer.
Slotted Hex Washer
A hex head with built in washer and a slot.
Socket CapSocket Cap Profile Button HeadButton Head Profile    
Socket Cap
A small cylindrical head using a socket drive.
Button
A low profile rounded head using a socket drive.
   

Drive Types

Phillips DrivePhillips Drive Top Slotted DriveSlotted Drive Top Combo DriveCombo Drive Top Allen DriveAllen Drive Top
Phillips and Pozi
An X shaped drive.
 
Slotted
A slot in the head.
 
Combination
A combination of slotted and Phillips drives.
Abbreviated Combo
Socket, Hex or Allen
A hexagonal hole for use with an Allen wrench.

Nut Types

Hex
A six sided nut. Also referred to as a finished hex nut.
Nylon Insert Lock
A nut with a nylon insert
to prevent backing off.
Also referred to as a Nylock
Jam / Lock
A hex nut with a reduced height.
Nylon Insert Jam Lock
A nyloc nut with a reduced height.
Acorn Nut
Wing
A nut with 'wings' for hand tightening.
Dome
A nut with a domed top over the end of the fastener.
Acorn
Acorn nuts are a high crown type of cap nut, used for appearance.
Flange
A nut with a built in washer like flange.
Tee
A nut designed to be driven into wood to create a threaded hole.
Square
A four sided nut.
Cone Lock
A non-reversible lock nut used for high temperature applications
Keps
A nut with an attached free-spinning external tooth lockwasher.
Coupling Nut      
Coupling
Coupling nuts are long nuts used to connect pieces of threaded rod or other male threaded fasteners.
     

Washer Types

Flat
A flat washer used to
distribute load.
Mudguard
An oversize flat washer used to further distribute load especially on soft materials.
Cup
A washer used to obtain a 'finished' look. Usually used with oval head screws.
Spring
The most common style of washer used to prevent nuts and bolts from backing out.
Dock Washer
External Tooth Lock
A washer with external 'teeth' Used to prevent nuts and bolts from backing out.
Internal Tooth Lock
A washer with internal 'teeth' Used to prevent nuts and bolts from backing out.
Square
A square shaped washer.

Heavy Duty
Dock washers have a larger outside diameter and are thicker than standard.

       
 

 

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