Looking for the best 3/8-16 threaded knobs? We’ve curated a list of top 10 options to help you find the perfect fit for your needs, offering a range of designs and materials for a secure grip and easy tightening.
3/8-16 threaded knobs are essential tools for anyone working with machinery or equipment. They provide a secure grip and easy tightening, making tasks faster and more efficient. Whether you’re a DIY enthusiast or a professional, these knobs are a must-have in your toolkit.
From star-shaped handles to ball knobs, there’s a design for every need. Made from durable materials like nylon, stainless steel, and Bakelite, they ensure long-lasting performance. These knobs are perfect for T-tracks, lawn mowers, and even fitness equipment.
Find the perfect fit. Save time. Work smarter.
List of Top 10 3/8-16 Threaded Knobs
| Image | Title | Best For | Price |
|---|---|---|---|
 |
4 Pcs Star Knobs, 3/8-16 Knob Through Hole Hand Tighten Clamping Knobs Plastic Black Threaded Nuts for T Track Bolts, Jig, Mechanical Equipment (3/8”-16) |
It is perfect for machine operators, craftsmen and hobbyists. They can quickly clamp bolted parts with a firm hold. |
|
 |
Aifeier ET 4 Pcs 3/8″-16 Female Thread Knob Black Nylon 5 Star Shaped Head Clamping Nuts Knob (ID 0.375″/9.525mm) |
These 3/8″-16 star-shaped knobs are perfect for DIYers and professionals who need reliable clamping solutions. They’re ideal for tools like saws, drill presses, and lathes, offering a comfortable grip and secure tightening. |
|
 |
6 Pcs 3/8-16 Threaded Knob Nut, 5 Star Shaped Female Thread Knob with Sturdy PP and Stainless Steel Thread, Black Plastic Star Knobs Screw-On Clamping Knobs for Tool, Machinery & Equipment (3/8″-16) |
These star knobs are for people who fix tools. They work well for machine parts. Buy them if you need a tight grip. They are good for shop work. The plastic is strong. The metal will not rust. These nuts help you turn things fast. Use them on your gear. They fit a 3/8-16 bolt. |
|
 |
Ryanuisto 5Pcs 3/8″-16 Threaded Ball Knobs,1 3/8″ Dia Ball Knob Female, 5/8″ Thread Depth, 1/16″ Thread Pitch, 2/5″ Thread Dia Female Thread, Bakelite Handle Thermoset Ball Knob Lawn Mowers Black |
These ball knobs are for people who fix tools. They fit lawn mowers. They are strong and easy to grip. These parts last a long time. They help you work fast. |
|
 |
(4pcs) 481625-01 Wing Nut Knob 3/8″-16 x 1-1/4″ For Scag Grass Catcher Cheetah Turf Tiger & More,Fits SFZ48-18FR SCZ61RD-31FX SFW48-16BV SFZ48-18FR SCZ52V-23FX |
This 4-piece wing nut knob set is perfect for Scag lawn mower owners who need a reliable replacement part. It’s easy to install and fits many Scag models, making it ideal for keeping your mower in top shape. |
|
 |
Taytools 774021 Lot 10 each 3/8 16 Male Threads Star Knobs 2 inch Diameter with 2 inch Long Threaded Post |
These Taytools Star Knobs are perfect for anyone needing sturdy, easy-to-grip knobs for their projects. Whether you’re building machinery, repairing tools, or crafting DIY projects, these knobs offer reliable performance and simple installation. |
|
 |
Guduling 12pcs Star Knob 3/8-16, 6-Star 3/8″-16 Female Thread Knob,Black 3/8-16 Star Knob for T Track Bolts Jigs Knobs Sawing Machine, Drilling Machine, Lathe (ID 0.375″/9.5mm) |
This is perfect for woodworkers, shop users, and machine builders who need a strong, easy-grip knob. It is also great for drill presses, saws, and jigs that need fast, simple tightening. |
|
 |
5Pcs 3/8″-16 Threaded Ball Knobs,1 3/8″ Dia Ball Knob Female, 5/8″ Thread Depth, 1/16″ Thread Pitch, 2/5″ Thread Dia Female Thread, Bakelite Handle Thermoset Ball Knob Lawn Mowers Black |
This set is perfect for lawn mower owners, DIY fans, and anyone who needs strong, easy‑to‑grip ball knobs for tools or machines. It’s great for people who want simple, safe, and steady control when making quick adjustments. |
|
 |
SB DISTRIBUTION LTD SBDs Black Phenolic ABS Plastic Ball Knob Female | 3/8″- 16 Thread Pitch 15/16″ Depth 1-3/8″ Diameter, 1-1/2″ Height w/Brass Coated Metal Insert Heavy Duty 1.02 Oz |
This heavy-duty black ball knob is perfect for fitness equipment and machine tools. It’s easy to use and built to last. |
|
 |
Big Horn 19709B-5PK 5 Star Thru Knob 3/8 x 16 (5/PK) |
This is perfect for plumbers who need a quick way to attach valves. It has a 5 Star Thru Knob and a 5 Pack of 3/8-16 threads. |
Detailed Reviews
This guide lists the best 3/8‑16 threaded knobs for your tools.
I studied each set for performance and price.
Pick a knob that is sturdy, simple, and fits well.
Read on for a quick pick that saves time and money.
1. 4 Pcs Star Knobs, 3/8-16 Knob Through Hole Hand Tighten Clamping Knobs Plastic Black Threaded Nuts for T Track Bolts, Jig, Mechanical Equipment (3/8”-16)
These 4 Pcs Star Knobs are handy tools for tightening and clamping. They have a 3/8-16 thread and a star-shaped handle for easy grip.
Made of high-quality nylon and galvanized steel, they are durable and anti-aging. Use them for T-tracks, jigs, or mechanical equipment.
| Pros | Cons |
|---|---|
|
|
Perfect For:
It is perfect for machine operators, craftsmen and hobbyists. They can quickly clamp bolted parts with a firm hold.
Ready to Purchase?
2. Aifeier ET 4 Pcs 3/8″-16 Female Thread Knob Black Nylon 5 Star Shaped Head Clamping Nuts Knob (ID 0.375″/9.525mm)
This knob set is strong. This knob set is simple. This knob set is ready.
Each piece has a 3/8″-16 female thread for a tight, steady hold. The five‑star head makes every turn easy and smooth.
The knobs use nylon and stainless steel for long life. They feel firm and safe in your hand.
Use them on saws, drill presses, and fences with no fuss. They grip well. They stay put.
| Pros | Cons |
|---|---|
|
|
Perfect For:
These 3/8″-16 star-shaped knobs are perfect for DIYers and professionals who need reliable clamping solutions. They’re ideal for tools like saws, drill presses, and lathes, offering a comfortable grip and secure tightening.
Ready to Purchase?
3. 6 Pcs 3/8-16 Threaded Knob Nut, 5 Star Shaped Female Thread Knob with Sturdy PP and Stainless Steel Thread, Black Plastic Star Knobs Screw-On Clamping Knobs for Tool, Machinery & Equipment (3/8″-16)
These 6 black star-shaped knobs are perfect for tightening and clamping in tools and machinery. Each knob has a 3/8-16 thread and is made with durable materials for long-lasting use. They are designed to fit 3/8″-16 rods and bolts easily.
The knobs are made of sturdy PP plastic and stainless steel threads. They resist wear and corrosion, ensuring a long service life. Their ergonomic grip makes them comfortable to use.
These knobs work well for lathes, drills, and fences. The 6-piece pack is great for professionals and DIYers. They offer reliable grip and durability for any project.
| Pros | Cons |
|---|---|
|
|
Perfect For:
These star knobs are for people who fix tools. They work well for machine parts. Buy them if you need a tight grip. They are good for shop work. The plastic is strong. The metal will not rust. These nuts help you turn things fast. Use them on your gear. They fit a 3/8-16 bolt.
Ready to Purchase?
4. Ryanuisto 5Pcs 3/8″-16 Threaded Ball Knobs,1 3/8″ Dia Ball Knob Female, 5/8″ Thread Depth, 1/16″ Thread Pitch, 2/5″ Thread Dia Female Thread, Bakelite Handle Thermoset Ball Knob Lawn Mowers Black
The Ryanuisto 5Pcs 3/8″-16 Threaded Ball Knobs are durable and reliable. They feature precision threads for a secure fit. These knobs are perfect for lawn mowers and machinery.
Made from thermoset Bakelite, they resist chemicals and wear. The ergonomic ball design ensures easy gripping, even with gloves. Each knob has a deep thread engagement for vibration resistance.
This 5-pack offers great value for multiple projects. The black finish looks sleek and professional. Ideal for replacements or new installations.
| Pros | Cons |
|---|---|
|
|
Perfect For:
These ball knobs are for people who fix tools. They fit lawn mowers. They are strong and easy to grip. These parts last a long time. They help you work fast.
Ready to Purchase?
5. (4pcs) 481625-01 Wing Nut Knob 3/8″-16 x 1-1/4″ For Scag Grass Catcher Cheetah Turf Tiger & More,Fits SFZ48-18FR SCZ61RD-31FX SFW48-16BV SFZ48-18FR SCZ52V-23FX
Replace your old wing nut knobs with these 481625-01 parts. This 4-piece set is a perfect fit for many Scag lawn mower models. Keep your mower in top shape with these easy-to-install knobs.
These wing nut knobs are compatible with a wide range of Scag models, including Cheetah, Turf Tiger, and more. You’ll get a secure fit and reliable performance from these high-quality parts.
With these wing nut knobs, you can quickly repair your Scag mower and get back to cutting grass in no time. Save time and money by replacing only the necessary parts, and keep your mower running smoothly.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 4-piece wing nut knob set is perfect for Scag lawn mower owners who need a reliable replacement part. It’s easy to install and fits many Scag models, making it ideal for keeping your mower in top shape.
Ready to Purchase?
6. Taytools 774021 Lot 10 each 3/8 16 Male Threads Star Knobs 2 inch Diameter with 2 inch Long Threaded Post
Get a set of 10 star knobs designed for easy grip and control. Each knob has a 3/8-16 threaded post that is 2 inches long. The knob diameter is a solid 2 inches for a comfortable hold.
These knobs stand 3 inches tall including the post. The shoulder diameter is .800 inches for a secure fit.
Perfect for many uses, these knobs are built to last. They offer strong threading and a simple design. Grab this set for reliable, easy-to-use star knobs.
| Pros | Cons |
|---|---|
|
|
Perfect For:
These Taytools Star Knobs are perfect for anyone needing sturdy, easy-to-grip knobs for their projects. Whether you’re building machinery, repairing tools, or crafting DIY projects, these knobs offer reliable performance and simple installation.
Ready to Purchase?
7. Guduling 12pcs Star Knob 3/8-16, 6-Star 3/8″-16 Female Thread Knob,Black 3/8-16 Star Knob for T Track Bolts Jigs Knobs Sawing Machine, Drilling Machine, Lathe (ID 0.375″/9.5mm)
Guduling 12pcs Star Knob is a must-have for anyone working with machinery or tools. This set includes 12 black knobs with 3/8″-16 female threads, perfect for secure tightening. The ergonomic star design provides a comfortable, non-slip grip.
These durable knobs are made of high-quality plastic and stainless steel, ensuring long-term use. They are easy to install and adjust, making them ideal for various applications, from drill presses to food equipment.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This is perfect for woodworkers, shop users, and machine builders who need a strong, easy-grip knob. It is also great for drill presses, saws, and jigs that need fast, simple tightening.
Ready to Purchase?
8. 5Pcs 3/8″-16 Threaded Ball Knobs,1 3/8″ Dia Ball Knob Female, 5/8″ Thread Depth, 1/16″ Thread Pitch, 2/5″ Thread Dia Female Thread, Bakelite Handle Thermoset Ball Knob Lawn Mowers Black
These ball knobs are strong, simple, and built to last. The smooth Bakelite ball makes each turn easy and quick.
They fit tight. They stay steady. They work on many machines.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This set is perfect for lawn mower owners, DIY fans, and anyone who needs strong, easy‑to‑grip ball knobs for tools or machines. It’s great for people who want simple, safe, and steady control when making quick adjustments.
Ready to Purchase?
9. SB DISTRIBUTION LTD SBDs Black Phenolic ABS Plastic Ball Knob Female | 3/8″- 16 Thread Pitch 15/16″ Depth 1-3/8″ Diameter, 1-1/2″ Height w/Brass Coated Metal Insert Heavy Duty 1.02 Oz
This SB DISTRIBUTION LTD SBDs Black Phenolic ABS Plastic Ball Knob is a heavy-duty and durable solution for your equipment needs. It features a brass-coated metal insert and a polished finish, making it an excellent choice for various applications.
The 3/8″-16 thread pitch, 15/16″ depth, and 1-3/8″ diameter make it easy to install. It’s highly recommended for fitness equipment and machine tools. Use it with confidence.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This heavy-duty black ball knob is perfect for fitness equipment and machine tools. It’s easy to use and built to last.
Ready to Purchase?
10. Big Horn 19709B-5PK 5 Star Thru Knob 3/8 x 16 (5/PK)
These strong knobs work well. They fit tight on bolts. This pack has five pieces.
The shape is easy to grip. They last a long time.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This is perfect for plumbers who need a quick way to attach valves. It has a 5 Star Thru Knob and a 5 Pack of 3/8-16 threads.
Ready to Purchase?
Buying Guide
3/8-16 threaded knobs are essential tools for anyone working with machinery or equipment. They make tasks faster and easier with their secure grip and easy tightening.
Whether you’re a DIY enthusiast or a professional, finding the right knobs can save time and improve efficiency. Here’s what to consider when buying the best 3/8-16 threaded knobs:
- Material: Choose durable materials like nylon, stainless steel, or Bakelite. They ensure long-lasting performance and resist wear and corrosion.
- Design: Pick a design that fits your needs, such as star-shaped, ball, or wing nut knobs. Each offers a unique grip for different tasks.
- Thread Type: Ensure the knob has a 3/8-16 thread for a secure fit. Check if it’s male or female threaded based on your application.
- Application: Consider where you’ll use the knobs, like T-tracks, lawn mowers, or fitness equipment. Some knobs are specialized for specific tasks.
- Quantity: Buy in packs (e.g., 4, 6, or 12 pieces) to save money and have extras for future projects.
- Ergonomics: Look for knobs with an ergonomic grip for comfort, especially during long hours of work.
- Price: Compare prices to find the best value without compromising on quality.
With these factors in mind, you’ll find the perfect 3/8-16 threaded knobs for your needs. Work smarter and get the job done with the right tools!