Door Screws

To select the right fastener, screw, nail or connector in door hardware is a crucial task. With so many options available, it is hard to know which one to choose from. We give below a range of different varieties of door screws used in fixing door hardware:

• Sheet Metal Screw
• Machine Screw
• Set Screw
• Wood Screw
• Lag Screw
• Drywall/Deck Screw
• Power Drive Fastener
• Turnbuckle
• Screw Eye/Hook
• Carriage Bolt
• Stove Bolt
• Machine Bolt
• Washer
• Nut
• Cotter Pin
• Rivet

Sheet Metal Screw

This type of screw fastens thin metal to thin metal. The screw can have flat, oval, round or binding heads. Typical lengths of these screws range from 1/8" to 2". Starting holes are either punched or drilled and should be slightly smaller than the screw diameter.

Machine Screw

The machine screws have round, oval, flat and fillister heads. This screw is intended to be screwed into pre threaded holes in metal. The screw is available in coarse (24 threads per inch) and fine (32 threads per inch) sizes. The round head type is the most commonly used one while the flat head type is used when the top must be flush with the surface. Oval headed machine screws are used in countersunk holes while Fillister heads are used in counter-bored holes.

Set Screw
This type of screw prevents bolts from loosening due to vibration. The screw which is thumb type can be tightened by hand. Headless set screws are tightened with the help of a screwdriver. The Square head set screws are tightened with a wrench while the Socket set screws are tightened with a hex wrench.

Wood Screw
This type of screw is usually made of unhardened steel, stainless steel, aluminum or brass and can have a choice of several coatings like bright-finished, zinc-, cadmium- or chrome-plated. Threads on this screw run from the point along 3/4 of the length and heads are slotted.

Lag Screw
This screw is also known as lag bolt. This screw is similar to wood screws but stronger. This type of screw is used when ordinary screws are too short or too lightweight and when increased gripping power is needed.

Drywall/Deck Screw
This type of screw is used when installing drywall or decking material. The screw is coated to prevent rust.

Power Drive Fastener
This type of fastener is designed specifically for use with power equipment. This fastener has a self-tapping or self-drilling design. This type of screw includes a wide variety of special-purpose designs.

Turnbuckle
The turnbuckle is used to tighten wire or for bracing doors. This type of screw consists of a barrel-shaped metal device with a threaded rod inserted into each end. Rods have eyes at both ends while some other types have a hook on one end and an eye on the other.

Screw Eye/Hook
The basic difference between a screw eye and a hook is that a screw eye consists of screw thread at one end and a ring at the other while a screw hook consists of screw thread at one end and a hook at the other.

Carriage Bolt
This type of screw has a square shoulder under the head that pulls into soft materials like wood and prevents the bolt from turning while the nut is tightened. The screw has coarse, partial threads and a smooth, rounded head.

Stove Bolt
This type of screw's head can be flat, oval or round. It is used to hold light metals or wood. The heads are slotted for a screwdriver.

Machine Bolt
The machine bolt always come with regular, square, hex, button or countersunk heads. Square heads fasten joints where bolt requirements are not too severe. Button heads work best where smooth surfaces are necessary while countersunk heads are used for flush surfaces.

Threaded Rod
The threaded rod is with a continuous thread from one end to the other and available in different diameters. This type of screw is used where extra-long bolts are required and can be bent to make U-bolts, eye bolts and J-bolts.

Washer
Washer is a small metal circle that provides a hard surface against which you tighten a screw. The washer matches the size of the screw it is being used with and is available in flat, countersunk or flush shapes.

Nut
This type of screw is used tighten the bolt. Most common are hex and square nuts. Another variant is the wing and knurled nuts, also used where frequent adjustment or disassembly is necessary. There is the locknut type which has a self-locking feature that allows it to be locked into position without additional lock washers, cotter pins or locking wire.

Cotter Pin
Cotter Pin This is a versatile fastening device, which is made of ferrous and nonferrous wire. It is available in various diameters and lengths. It inserts into a hole. An eye on one end prevents the cotter pin from going through while prongs at the other end are bent back to lock the pin.

Rivet
The Rivet is a type of screw that securely fastens something that can be reached from just one side. This is a multi-grip type of screw which expands to fill over-sized and irregular holes and self-adjusts for misaligned holes. Usually used in metal, plastic and composite materials. This type of screw has dome, countersunk and large flange head screws.

Door Hardware Marketplace

Product Catalog   Door Hardware Manufacturers & Exporters   Trade Leads for Door Hardware