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Tri-Lobular Thread Forming Screws for Plastic Applications

Tri-Lobular thread-forming screws are special fasteners designed for use in plastic materials. They feature a unique three-lobed design that displaces plastic material rather than cutting it. As the screw is driven into a plastic surface, the plastic conforms around the screws’ threads, locking the screw in place. This design creates a firm hold that resists vibration while preserving the integrity of the plastic material.
At Empire Bolt & Screw, we’re a leading national supplier of Tri-Lobular thread-forming screws for plastic assemblies. We offer a variety of head styles, drive types, and material options. Whatever your application, you can rely on Empire for superior-quality thread-forming screws.

Order Tri-Lobular Thread Forming Screws in Bulk or Custom Quantities Today

Browse the selection below to find the Tri-Lobular thread-forming screws that meet your specifications. With fast turnaround, competitive pricing, nationwide shipping, and helpful service, Empire Bolt & Screw is your one-stop source for tri-lobular thread-forming screws.
Need assistance? Contact us for technical support or to request a quote.
 
Model Product Size Plate Head Pkg Qty  
T HW816.114SS410 #8-16 x 1-1/4" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl #8-16 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW816.114BO #8-16 x 1-1/4" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax #8-16 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW816.114Z #8-16 x 1-1/4" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax #8-16 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW816.112SS #8-16 x 1-1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl #8-16 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW816.112SS410 #8-16 x 1-1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl #8-16 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW816.112BO #8-16 x 1-1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax #8-16 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW816.112Z #8-16 x 1-1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax #8-16 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1014.38SS #10-14 x 3/8" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl #10-14 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.38SS410 #10-14 x 3/8" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl #10-14 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.38BO #10-14 x 3/8" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax #10-14 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1014.38Z #10-14 x 3/8" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax #10-14 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1014.12SS #10-14 x 1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl #10-14 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.12SS410 #10-14 x 1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl #10-14 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.12BO #10-14 x 1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax #10-14 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1014.12Z #10-14 x 1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax #10-14 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1014.58SS #10-14 x 5/8" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl #10-14 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.58SS410 #10-14 x 5/8" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl #10-14 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.58BO #10-14 x 5/8" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax #10-14 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1014.58Z #10-14 x 5/8" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax #10-14 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1014.34SS #10-14 x 3/4" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl #10-14 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.34SS410 #10-14 x 3/4" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl #10-14 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.34BO #10-14 x 3/4" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax #10-14 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1014.34Z #10-14 x 3/4" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax #10-14 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1014.1SS #10-14 x 1" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl #10-14 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.1SS410 #10-14 x 1" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl #10-14 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.1BO #10-14 x 1" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax #10-14 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1014.1Z #10-14 x 1" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax #10-14 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1014.114SS #10-14 x 1-1/4" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl #10-14 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.114SS410 #10-14 x 1-1/4" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl #10-14 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.114BO #10-14 x 1-1/4" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax #10-14 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1014.114Z #10-14 x 1-1/4" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax #10-14 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1014.112SS #10-14 x 1-1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl #10-14 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.112SS410 #10-14 x 1-1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl #10-14 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1014.112BO #10-14 x 1-1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax #10-14 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1014.112Z #10-14 x 1-1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax #10-14 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1410.12SS 1/4"-10 x 1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl 1/4"-10 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1410.12SS410 1/4"-10 x 1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl 1/4"-10 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1410.12BO 1/4"-10 x 1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax 1/4"-10 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1410.12Z 1/4"-10 x 1/2" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax 1/4"-10 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1410.58SS 1/4"-10 x 5/8" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl 1/4"-10 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1410.58SS410 1/4"-10 x 5/8" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl 1/4"-10 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1410.58BO 1/4"-10 x 5/8" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax 1/4"-10 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1410.58Z 1/4"-10 x 5/8" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax 1/4"-10 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1410.34SS 1/4"-10 x 3/4" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl 1/4"-10 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1410.34SS410 1/4"-10 x 3/4" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl 1/4"-10 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1410.34BO 1/4"-10 x 3/4" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax 1/4"-10 Steel Black Oxide/Wax HWH 10,000
Add to
Quote
T HW1410.34Z 1/4"-10 x 3/4" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Zinc/Wax 1/4"-10 Steel Zinc/Wax HWH 10,000
Add to
Quote
T HW1410.1SS 1/4"-10 x 1" HWH Slotted Tri-Lobular Thread Rolling Screw, 18-8 Stnlss Stl 1/4"-10 18-8 Stnlss Stl HWH 10,000
Add to
Quote
T HW1410.1SS410 1/4"-10 x 1" HWH Slotted Tri-Lobular Thread Rolling Screw, 410 Stnlss Stl 1/4"-10 410 Stnlss Stl HWH 10,000
Add to
Quote
T HW1410.1BO 1/4"-10 x 1" HWH Slotted Tri-Lobular Thread Rolling Screw, Steel Black Oxide/Wax 1/4"-10 Steel Black Oxide/Wax HWH 10,000
Add to
Quote

Size:
#8-16
Plate:
410 Stnlss Stl
Head:
HWH
Size:
#8-16
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
#8-16
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
#8-16
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
#8-16
Plate:
410 Stnlss Stl
Head:
HWH
Size:
#8-16
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
#8-16
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
#10-14
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
410 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
#10-14
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
#10-14
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
410 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
#10-14
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
#10-14
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
410 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
#10-14
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
#10-14
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
410 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
#10-14
Plate:
Steel Zinc/Wax
Head:
HWH
Model:
Size:
#10-14
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
410 Stnlss Stl
Head:
HWH
Model:
Size:
#10-14
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
#10-14
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
#10-14
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
410 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
Steel Black Oxide/Wax
Head:
HWH
Size:
#10-14
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
#10-14
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
410 Stnlss Stl
Head:
HWH
Size:
#10-14
Plate:
Steel Black Oxide/Wax
Head:
HWH
Size:
#10-14
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
1/4"-10
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
1/4"-10
Plate:
410 Stnlss Stl
Head:
HWH
Size:
1/4"-10
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
1/4"-10
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
1/4"-10
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
1/4"-10
Plate:
410 Stnlss Stl
Head:
HWH
Size:
1/4"-10
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
1/4"-10
Plate:
Steel Zinc/Wax
Head:
HWH
Size:
1/4"-10
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
1/4"-10
Plate:
410 Stnlss Stl
Head:
HWH
Size:
1/4"-10
Plate:
Steel Black Oxide/Wax
Head:
HWH
Model:
Size:
1/4"-10
Plate:
Steel Zinc/Wax
Head:
HWH
Model:
Size:
1/4"-10
Plate:
18-8 Stnlss Stl
Head:
HWH
Size:
1/4"-10
Plate:
410 Stnlss Stl
Head:
HWH
Model:
Size:
1/4"-10
Plate:
Steel Black Oxide/Wax
Head:
HWH

Size, Material, and Head Options for Tri-Lobular Thread Forming Screws

We offer Tri-Lobular Thread Forming Screws in a wide range of sizes, materials, and head types. Standard and custom configurations are available to meet unique requirements.

Size and Length Options

  • Size Options: From #4-20 to 5/16"-18
  • Length Options: From 1/4" up to 2"

Material and Plating Options

  • 410 Stainless Steel: High strength and good corrosion resistance
  • 18-8 Stainless Steel: Excellent corrosion resistance
  • Steel with Black Oxide/Wax: Adds a dark finish
  • Steel with Zinc/Wax: Cost-effective moderate corrosion protection

Head Styles

  • Flat Head
  • Hex Washer Head (HWH)
  • Pan Head

Key Benefits of Tri-Lobular Thread Forming Screws

  • Displaces plastic material instead of cutting. This design preserves the integrity of the plastic substrate.
  • Creates strong internal threads with high thread engagement for greater holding power.
  • Resists vibration and loosening.
  • Reduces the need for inserts or secondary anchoring in plastic surfaces.

Industrial Applications and Industries That Use Tri-Lobular Thread Forming Screws

Tri-Lobular thread-forming screws are ideal for manufacturers that assemble components made from thermoplastics or other moldable materials. They feature a design that prevents chipping or damaging plastic substrates, creating a clean, reliable connection across a range of production settings. Common uses include:

Your Source for Tri-Lobular Thread Forming Screws and Plastic Fastening Solutions

At Empire Bolt & Screw, we’ve supplied manufacturers, OEMs, and other industrial professionals with high-quality fasteners for decades. Our team offers engineering guidance, dimensional verification, and supply chain management solutions. With Vendor Managed Inventory, Kanban, and Just-In-Time programs, we help streamline your inventory while maintaining a steady stock of fastening products. When you partner with Empire for your tri-lobular thread-forming screws and other industrial fasteners, you can count on:

Contact Us Today to Get Tri-Lobular Thread Forming Screws at Great Prices

Request a quote today or contact our office to discuss your Tri-Lobular thread-forming screw requirements. Looking for other plastic fasteners? Explore our full inventory of thread cutting screws and custom fastener options. Empire Bolt & Screw is the trusted source for high-performance fasteners for plastic assemblies.

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Toll-Free US & Canada: 888-534-0636 - Phone: 509-534-0636 - Fax: 509-534-1475