Slotted Thumb Screws | McMaster-Carr

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	Drive Style Drive Style	Show

	Slotted

	Drive Style Drive Style	Hide


Hex	Slotted

Phillips	External Hex

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

0-80
2-56
4-40
4-48
6-32
6-48
8-32
8-40
10-24
10-32
1/4"-20
1/4"-28
5/16"-18
3/8"-16
1/2"-13
M1.6
M3
M3.5
M4
M5
M6
M8
M10

	Length Length

	Head Type Head Type


Thumb	Socket

Flat	Headless

Rounded

	Material Material

Stainless Steel

Steel

Plastic

	Head Diameter Head Diameter

	Round-Head Thumb Screw Profile Round-Head Thumb Screw Profile


Low	High

Narrow

	Thumb Screw Head Shape Thumb Screw Head Shape

	Round

	Head Texture Head Texture


Knurled	Smooth

	Threading Threading

	Fully Threaded
	Partially Threaded

	Head Height Head Height

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Color Color

	Black
	Off-White

	Thread Direction Thread Direction

	Right Hand

	Tensile Strength Tensile Strength

	Thread Fit Thread Fit

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Thread Type Thread Type

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Thread Length Thread Length

	Shoulder Length Shoulder Length

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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About Shoulder Screws

Slotted Stainless Steel Low-Profile
Knurled-Head Thumb Screws

These slotted thumb screws have a thin, knurled head for use in low-clearance applications. Made of 18-8 stainless steel, they are chemical resistant.

Slotted Narrow Knurled-Head Thumb Screws

These slotted thumb screws are slim to fit in tight spaces.

Nylon Thumb Screws with Slotted Drive

These nylon thumb screws are chemical resistant, nonconductive, and lightweight.

Captive Panel Screws

Thumb-Screw-Head Captive Panel Screws

Install these thumb-screw-head screws through a hole and thread on a retainer to keep secure—no special tools are required.

Rounded Head Captive Panel Screws

Install these rounded head screws through a hole and thread on a retainer to keep secure—no special tools are required.

Flush-Mount Press-Fit Captive Panel Screws

These screws mount flush against the outer panel's surface for low-clearance applications.

Rounded Head Quarter-Turn Captive
Panel Screws with Clip-On Nut

These rounded head screws have a nut that clips onto the edge of a thin panel, allowing you to mount the screw near edges. A quarter-turn locks and releases access panels, doors, and covers.

Rounded Head Quarter-Turn Captive
Panel Screws with Rivet-Mount Nut

These rounded head nuts can be riveted into thin panels for a flush fit. They can be mounted without spaces between the panels. A quarter-turn locks and releases access panels, doors, and covers.

Rounded Head Quarter-Turn Captive
Panel Screws with Front Press-Fit Nut

Press these rounded head nuts into a closed-end hole or thick panel in applications where the back of the panel is inaccessible. A quarter-turn locks and releases access panels, doors, and covers.

Rounded Head Quarter-Turn Captive
Panel Screws with Back Press-Fit Nut

Press these rounded head nuts into the backside of a panel in applications where you have access to both sides of the panel. A quarter-turn locks and releases access panels, doors, and covers.

Shoulder Screws

Metric Slotted Low-Profile Steel Shoulder Screws

With a reduced head size and an unthreaded shoulder, use these screws as a shaft or dowel pin for small rotating parts in low-clearance applications.

Slotted 18-8 Stainless Steel Precision Shoulder Screws

Metric Slotted 18-8 Stainless
Steel Precision Shoulder Screws

With a shoulder that’s twice as precise as standard shoulder screws, these metric shoulder screws act as a shaft or axle for bearings and other moving parts in applications that require smooth and accurate movement, such as measuring and lab equipment. Made of 18-8 stainless steel, they’re nearly as strong as steel but won’t rust in outdoor or washdown environments.

Headless Alloy Steel Precision Shoulder Screws

Without a head to get in the way, these screws fit in tight spaces where standard shoulder screws cannot. Either thread them in a countersunk hole for a flush mount, or install them with the shoulder sticking out to use them as pins or dowels for aligning and locating components.

Slotted Low-Profile Precision Shoulder Screws

Slotted Ultra-Low-Profile Precision Shoulder Screws

These slotted screws have a head height about one-third the head height of a standard shoulder screw. Use them in low-clearance applications such as inside machines.