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Thumb Screws

641 Products

Metric Stainless Steel Low-ProfileKnurled-Head Thumb Screws

The knurled head allows for easy manual tightening and loosening without tools, while the low-profile design provides a compact and sleek appearance. These screws are ideal for applications where frequent adjustments are needed and where a low-profile appearance is preferred.

Stainless Steel Low-ProfileKnurled-Head Thumb Screws

Stainless Steel Low-Profile Knurled-Head Thumb Screws feature a compact, textured head for easy manual adjustments, made from stainless steel for strength and corrosion resistance.

Slotted Stainless Steel Low-ProfileKnurled-Head Thumb Screws

These screws feature a low-profile head with knurled edges for easy manual tightening and loosening without tools. The stainless steel material ensures durability and resistance to corrosion, making them suitable for various environments.

Metric Steel Low-ProfileKnurled-Head Thumb Screws

Metric Steel Low-Profile Knurled-Head Thumb Screws are similar in function to their stainless steel counterparts but are made from carbon or alloy steel, often with a protective coating for corrosion resistance. They are designed to offer a secure grip and ease of use in applications where space is constrained and a low-profile design is required.

Steel Low-ProfileKnurled-Head Thumb Screws

Steel Low-Profile Knurled-Head Thumb Screws combine strength and a compact design, featuring a textured head for easy manual adjustments in tight spaces.

Brass Low-ProfileKnurled-Head Thumb Screws

Brass Low-Profile Knurled-Head Thumb Screws offer a stylish, corrosion-resistant solution with a compact design and textured head for easy hand adjustments in tight spaces.

Stainless Steel Flared-CollarKnurled-Head Thumb Screws

Stainless Steel Flared-Collar Knurled-Head Thumb Screws feature a robust design with a flared collar for added stability and a knurled head for easy manual adjustment, offering durability and corrosion resistance.

Aluminum Flared-CollarKnurled-Head Thumb Screws

Aluminum Flared-Collar Knurled-Head Thumb Screws provide a lightweight and corrosion-resistant option with a flared collar for stability and a knurled head for easy hand adjustments.

Brass Flared-CollarKnurled-Head Thumb Screws

Brass Flared-Collar Knurled-Head Thumb Screws combine a durable, corrosion-resistant brass construction with a flared collar for stability and a knurled head for easy manual adjustments.

Metric Stainless Steel RaisedKnurled-Head Thumb Screws

Metric Stainless Steel Raised Knurled-Head Thumb Screws feature a raised, textured head for a secure grip and easy manual adjustments, with metric threads and corrosion-resistant stainless steel for durability.

Stainless Steel RaisedKnurled-Head Thumb Screws

Stainless Steel Raised Knurled-Head Thumb Screws offer a textured, elevated head for a secure grip and easy manual adjustments, made from corrosion-resistant stainless steel for long-lasting durability.

Steel Raised Knurled-HeadThumb Screws

Steel Raised Knurled-Head Thumb Screws feature an elevated, textured head for easy hand adjustments, made from durable steel for strength and reliability.

Metric Steel RaisedKnurled-Head Thumb Screws

Metric Steel Raised Knurled-Head Thumb Screws provide a textured, elevated head for easy manual adjustments, with metric threads and durable steel construction for strength and reliability.

Brass Raised Knurled-HeadThumb Screws

Brass Raised Knurled-Head Thumb Screws offer a textured, elevated head for easy manual adjustments and are made from brass for corrosion resistance and a distinctive appearance.

Narrow Knurled-Head Thumb Screws

Narrow Knurled-Head Thumb Screws feature a slim profile with a textured head for easy manual adjustments in tight spaces, providing a compact and stylish fastening solution.

Slotted Narrow Knurled-HeadThumb Screws

Slotted Narrow Knurled-Head Thumb Screws combine a slim, textured head for easy manual adjustments with a slotted drive for versatility, ideal for applications with limited space.

Metric Narrow Knurled-HeadThumb Screws

Metric Narrow Knurled-Head Thumb Screws feature a slim, textured head for easy manual adjustments and are designed with metric threads for precise compatibility in compact applications.

Stainless Steel High-ProfileKnurled-Head Thumb Screws

Stainless Steel High-Profile Knurled-Head Thumb Screws feature an elevated, textured head for enhanced grip and easy manual adjustments, with stainless steel construction for durability and corrosion resistance.

Steel High-ProfileKnurled-Head Thumb Screws

Steel High-Profile Knurled-Head Thumb Screws offer an elevated, textured head for easy manual adjustments, with a robust steel construction for strength and reliability.

LILY Bearing stocks thumb screws with a knurled (grooved) head that lets them be tightened and loosened by hand, without a tool. Screws are available in five head profiles — narrow, raised, low-profile, high-profile, and flared-collar — and in steel, brass, and stainless steel. Use the filters below, or the comparison table, to narrow down by head profile, material, thread size, and length.

Compare by Head Profile

Head Profile	What It Is	Best For
Narrow	A slim, standard-diameter knurled head	General-purpose hand-tightened fastening where space is limited
Raised	A taller head than narrow, with more surface for gripping	Applications needing a more secure hand grip than a narrow head provides
Low-Profile	A short, flat knurled head	Tight clearance above the mounting surface
High-Profile	The tallest knurled head, with the most gripping surface	Frequent hand-tightening where maximum grip and leverage matter most
Flared-Collar	A knurled head with a wider flared base built in, acting like an integrated washer	Applications needing better load distribution without adding a separate washer

Most head profiles are available in steel, brass, and stainless steel. Slotted versions add a screwdriver slot to the head, letting you apply extra torque with a tool when hand-tightening alone isn't enough.

Need a Custom Thumb Screw?

Don't see the head profile, material, or length you need? Our team can cross-reference an existing part or quote a custom configuration. Request a Quote or Contact Us. LILY Bearing also offers customized fastener services.

Frequently Asked Questions

What is a thumb screw used for?

A thumb screw is designed for hand-tightening and loosening without a tool, which makes it a good fit for panels, access covers, and other parts that need to be removed or adjusted frequently. The knurled head grips the fingers securely, and slotted versions let you switch to a screwdriver when a job calls for more torque than hand-tightening alone can provide.

Which thumb screw head profile should I choose?

Choose a low-profile head where clearance above the surface is tight, and a raised or high-profile head where you need a more secure grip or more leverage for frequent hand-tightening. Choose a flared-collar head when you want built-in load distribution without adding a separate washer.