Monster Machine-Threaded Screws and Bolts


Machine-threaded fasteners are screws or bolts with a non-tapered shank that can be mated with a nut or driven into a tapped hole.

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Machine-Threaded Bolts
Machine-Threaded Screws
More information on the various machine-threaded screws and bolts available

Click on the links below to select just the size, style, and material of fasteners you need. If you need help searching or have special orders, email us at sales@monsterfastener.com.

Machine-Threaded Bolts

    Cap Screw Carriage Bolt Square Head Bolt Shoulder Bolt Tap Bolt Hanger Bolt Elevator Bolt Screw Eye Bolt
    Hex
Bolt
Carriage
Bolt
Square
Head
Bolt
Shoulder
Bolt
Tap
Bolt
Hanger
Bolt
Elevator
Bolt
Screw
Eye
Bolt
circle 1/8" (#6) #6
circle 5/32" (#8) #8 5/32"
circle 3/16" (#10) 3/16" #10 3/16"
circle 7/32" (#12) 7/32"
circle 1/4" 1/4" 1/4" 1/4" 1/4" 1/4" 1/4"
circle 5/16" 5/16" 5/16" 5/16" 5/16" 5/16" 5/16" 5/16"
circle 3/8" 3/8" 3/8" 3/8" 3/8" 3/8" 3/8" 3/8"
circle 7/16" 7/16;" 7/16;"
circle 1/2" 1/2" 1/2" 1/2" 1/2"
circle 9/16" 9/16"
circle 5/8" 5/8" 5/8"
circle 3/4" 3/4" 3/4"
circle 7/8" 7/8"
circle 1" 1"
circle 1-1/8" 1-1/8"
circle 1-1/4" 1-1/4"
   
Hex
Bolt
Carriage
Bolt
Square
Head
Bolt
Shoulder
Bolt
Tap
Bolt
Hanger
Bolt
Elevator
Bolt
Screw
Eye
Bolt


Machine-Threaded Screws

    Socket Cap Screw Set Screw Machine Screw Thumb Screw
    Socket
Cap
Screw
Set
Screw
Machine
Screw
Thumb
Screw
circle #0 #0 #0
circle #1 #1 #1
circle #2 #2 #2
circle #3 #3 #3
circle #4 #4 #4 #4
circle 1/8" (#6) #6 #6 #6 #6
circle 5/32" (#8) #8 #8 #8 #8
circle 3/16" (#10) #10 #10 #10 #10
circle 7/32" (#12) #12
circle 1/4" 1/4" 1/4" 1/4" 1/4"
circle 5/16" 5/16" 5/16" 5/16" 5/16"
circle 3/8" 3/8" 3/8" 3/8" 3/8"
circle 7/16" 7/16" 7/16"
circle 1/2" 1/2" 1/2"
circle 5/8" 5/8" 5/8"
circle 3/4" 3/4" 3/4"
   
Socket
Cap
Screw
Set
Screw
Machine
Screw
Thumb
Screw


Hex Bolt

A hex bolt has a hexagonal head, designed to be driven by a wrench.

Carriage Bolt

A carriage bolt has a domed or countersunk head, and the shank is topped by a short square section under the head. The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened.

Square Head Bolt

A square head bolt has a four-sided head. Compared to standard hex bolts, square bolts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening (though also greater resistance to tightening). Square bolts are typically mated with square-headed nuts.

Shoulder Bolt

A shoulder bolt differs from a machine screw in that the shank is ground to a precise diameter, known as the shoulder, and the threaded portion is smaller in diameter than the shoulder. Shoulder bolt specifications call out the shoulder diameter, shoulder length, and threaded diameter; the threaded length is fixed, based on the threaded diameter, and usually quite short. It is usually used for revolving joints in mechanisms and linkages; when used as a guide for the stripper plate in a die set its called a stripper bolt.

Tap Bolt

A tap bolt is a hex bolt threaded all the way to the head.

Hanger Bolt

A hanger bolt is a headless fastener that has machine screw threads on one end and self-tapping threads on the other designed to be driven into wood or another soft substrate. Often used for mounting legs on tables.

Elevator Bolt

An elevator bolt is similar to a carriage bolt, except the head is very thin and flat.

Screw Eye Bolt

A bolt with a looped head.

Socket Cap Screw

A socket cap screw is a type of cap screw with a hexagonal recessed drive. A hex key is required to tighten or loosen a socket screw. Socket screws are commonly used in assemblies that do not provide sufficient clearance for a conventional wrench or socket.

Set Screw

A headless screw used to fix a rotating part to a shaft. The set screw is driven through a threaded hole in the rotating part until it is tight against the shaft. The most often used type is the socket set screw, which is tightened or loosened with a hex key.

Machine Screw

A machine screw , also called a stove bolt, is generally a smaller fastener threaded the entire length of its shank. Used with a hex nut to attach two parts together, generally sheet metal.

Thumb Screw

A thumb screw is a threaded fastener designed to be twisted into a tapped hole by hand without the use of tools.

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