McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

0000-160
000-120
00-90
00-96
0-80
1-64
1-72
2-56
2-64
3-48
4-40
4-48
5-40
6-32
6-48
8-32
8-40
10-24
10-32
12-24
1/4"-20
1/4"-28
5/16"-18
3/8"-16
1/2"-13
M0.5
M0.8
M0.9
M1
M1.2
M1.4
M1.6
M2
M2.5
M2.6
M3
M3.5
M4
M5
M6
M8
M10
M12

	Thread Type Thread Type

	Material Material

	Drive Style Drive Style


Slotted	External Hex

Phillips	Hex

	Head Type Head Type


Rounded	Flat

Hex	Socket

Thumb	Headless

Oval

	Length Length

	Rounded Head Style Rounded Head Style


Round	Truss

Pan	Fillister

Cheese	Binding

	Head Diameter Head Diameter

	Head Height Head Height

	Threading Threading

	Fully Threaded
	Partially Threaded

	Tensile Strength Tensile Strength

	Finish Finish

	Rounded Head Profile Rounded Head Profile

	Screw Size Screw Size

	Flat Head Profile Flat Head Profile

Standard

Wide

Undercut

	Tip Type Tip Type


Flat	Pointed

Blunt	Cup

Drilling	Extended

	Countersink Angle Countersink Angle

82°

90°

100°

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Shoulder Diameter Shoulder Diameter

	Shoulder Length Shoulder Length

	Drive Size Drive Size

	For Use In For Use In

5,222 Products

Screws and Bolts

Rounded Head Screws

A domed head sits above the surface of your material. Includes screws such as pan, button, binding, and truss head screws.

Hex Head Screws

Hex head screws are easy to install with a wrench for a secure hold. Use them with a nut or in tapped holes.

Flat Head Screws

Flat and oval head screws are angled under the head to fit in countersunk holes.

Shoulder Screws

A cylindrical shoulder under the head allows parts to rotate around and slide along its length, so these screws are often used to guide and align components.

Elevator Bolts

Commonly used in tight spaces with moving parts, such as grain elevators and other belting systems, elevator bolts have a smooth, low-profile head that provides a flush fit when installed. The neck shape keeps them from turning when tightening a nut.

Tapping, Wood, and Drywall Screws

While other screws and bolts require holes with threads, tapping screws create their own threads.

Thumb Screws

Thumb screws provide a secure grip for tightening and loosening by hand.

Set Screws

Unlike screws that hold materials together with threads, set screws exert pressure at the tip to hold objects in place.

Captive Panel Screws

Secure panels and enclosures while allowing access. Screws become part of the panel when installed, so they won't fall out and get lost.

Binding Barrels and Screws

Use these as a low-profile alternative to standard nut and bolt combinations.

Fastener Assortments

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