Self-Tapping Screw Manufacturer
TIGHTU manufactures and supplies self-tapping screws that form mating threads during installation. The product scope includes Type A, Type AB, Type B, thread-cutting, thread-forming, plastic, sealing-washer, micro, and custom configurations.
Define the substrate, pilot hole, thread, head and drive, material, finish, and applicable standard for project review.
- Standard-based and drawing-based screw projects
- Thread-forming and thread-cutting selection paths
- OEM/ODM support based on drawings, samples, and application requirements
What Is a Self-Tapping Screw?
A self-tapping screw forms or cuts a mating internal thread as it enters a compatible material. Many self-tapping designs use a drilled, punched, or molded pilot hole. Pointed types may pierce certain thin or soft materials, but this should not be assumed without checking the screw design and substrate.
A self-tapping screw is not automatically a self-drilling screw. A self-drilling screw includes a drill-shaped point intended to create its own pilot hole in a suitable material. The correct product therefore depends on the substrate, pilot-hole preparation, required thread-forming method, and installation process.
Self-Tapping Screw Types
The tapping method, point design, thread profile, pilot hole, and substrate must be considered together. Use these categories as selection starting points, then confirm the exact dimensions, material, finish, and installation conditions for the project.
Type A / Type AB Self-Tapping Screws
Type A and Type AB screws generally use pointed ends and spaced threads to form mating threads in suitable thin materials. Type AB provides a commonly used alternative when the assembly requires a broader tapping-screw application range.
Type A or AB, substrate thickness, pilot hole, head style, drive, material, and finish.
Type B Self-Tapping Screws
Type B screws generally have a blunt point with incomplete entering threads and are intended to work with an appropriately prepared pilot hole.
pilot-hole diameter, substrate thickness, thread size, head style, and installation method.
Thread-Cutting Self-Tapping Screws
Thread-cutting screws use cutting features to create an internal thread in a prepared hole. The installation process can produce chips, so the substrate and assembly environment must be considered.
cutting-screw type, substrate, pilot hole, chip management, and required thread engagement.
Thread-Forming / Thread-Rolling Screws
Thread-forming screws create a mating thread by displacing compatible material instead of removing it through a conventional cutting action.
substrate ductility, pilot hole, thread geometry, installation torque, and assembly validation.
Self-Tapping Screws for Plastic
Plastic self-tapping screws use thread geometries selected around the plastic material, wall thickness, pilot hole, and required engagement.
plastic type, boss dimensions, pilot hole, engagement length, head bearing area, and repeated-assembly requirements.
Sealing Washer Self-Tapping Screws
This configuration combines a self-tapping screw with a sealing washer for assemblies that require coverage around the entry point or an application-specific sealing interface.
washer construction, substrate, hole preparation, head style, drive, and actual sealing conditions.
Micro Self-Tapping Screws
Micro self-tapping screws address compact assemblies where thread diameter, head size, driver access, pilot-hole control, and surrounding component clearance require close coordination.
thread size, head dimensions, substrate, pilot hole, drive access, and mating-component geometry.
Custom Self-Tapping Screws
Custom self-tapping screws can be developed from a drawing, sample, substrate, or assembly requirement when a standard point, thread, head, drive, material, or finish does not fit the application.
controlled drawing, substrate, pilot hole, critical dimensions, material, finish, quantity, and application conditions.
Prevent Common Self-Tapping Screw Mismatches
Self-Tapping or Self-Drilling?
Selecting a tapping screw when the process requires the fastener to drill through the substrate can interrupt installation. Confirm whether the assembly already has a pilot hole or requires a drill-point screw.
Pilot Hole and Substrate
A pilot hole that is too small can increase installation torque or stress the surrounding material. A hole that is too large can reduce thread engagement. Hole preparation must be coordinated with the screw geometry, substrate, and material thickness.
Thread-Cutting or Thread-Forming?
Thread-cutting screws remove material while creating the mating thread. Thread-forming screws displace compatible material. Chip control, substrate behavior, installation torque, and joint requirements help determine which method is appropriate.
Head, Drive, Material, and Finish
The thread may be suitable while the head, driver access, material, or finish remains incompatible with the assembly. These attributes should be reviewed together rather than selected independently.
Compare Self-Tapping Screw Configurations
| Configuration | Primary Difference | Suitable Selection Conditions | Important Checks |
|---|---|---|---|
| Type A / Type AB | Pointed tapping screw with spaced or coarse thread geometry | Suitable thin materials and general sheet assembly | Type designation, pilot hole, substrate thickness, and thread engagement |
| Type B | Blunt point with entering threads | Prepared holes in suitable metal, plastic, or composite parts | Pilot-hole diameter, material thickness, and installation method |
| Thread-cutting | Cutting features create the mating thread | Materials and assemblies where controlled thread cutting is acceptable | Chip creation, cutting geometry, pilot hole, and substrate |
| Thread-forming / thread-rolling | Material is displaced to form the mating thread | Compatible ductile materials and chip-sensitive assemblies | Substrate behavior, pilot hole, installation torque, and validation |
| Plastic self-tapping | Thread geometry selected for plastic components | Molded bosses, housings, and compatible plastic assemblies | Resin type, boss wall, pilot hole, engagement, and repeated assembly |
| Sealing washer | Screw and sealing washer operate as one assembly | Entry points requiring a washer-supported sealing interface | Washer material, contact surface, compression, and environment |
| Micro self-tapping | Small thread and head geometry | Electronics, instruments, and compact assemblies | Pilot-hole consistency, head dimensions, driver access, and surrounding clearance |
| Custom self-tapping | Drawing- or sample-based configuration | Nonstandard thread, point, head, material, or finish | Controlled drawing, critical dimensions, substrate, quantity, and validation requirements |
These configurations provide an initial selection framework. The final screw must be reviewed with the actual substrate, mating geometry, installation equipment, and applicable standard or drawing.
Build a Complete Self-Tapping Screw Specification
| Specification Area | What to Define | Why It Matters |
|---|---|---|
| Substrate | Metal, plastic, composite, wood-based material, or other assembly material | Determines whether the material can support the selected tapping method |
| Hole preparation | Drilled, punched, molded, pierced, or no prepared hole | Separates ordinary self-tapping requirements from self-drilling or piercing applications |
| Tapping method | Type A, AB, B, thread-cutting, thread-forming, plastic thread, or custom | Defines how the mating thread is created |
| Pilot hole | Diameter, depth, tolerance, and relationship to the material thickness | Influences installation torque and thread engagement |
| Thread | Metric or inch designation, diameter, pitch, length, and applicable standard | Establishes the mating thread geometry |
| Point | Pointed, blunt, cutting, forming, or custom point design | Affects entry into the pilot hole and tapping behavior |
| Head and drive | Required head profile and tool interface | Determines surface condition, bearing area, and driver access |
| Material | Required material and grade | Must suit forming requirements, mechanical needs, and service environment |
| Finish | Plating, coating, passivation, appearance, or other surface requirement | Must be coordinated with the base material and application |
| Assembly process | Installation equipment, access, speed, and repeat-assembly expectations | Helps define driver and thread-forming requirements |
| Order information | Quantity, packaging, destination, and requested documentation | Supports commercial and production review |
TIGHTU works with fastener materials including carbon steel, stainless steel, alloy steel, copper, brass, aluminum, nylon, and titanium. Material availability for a specific self-tapping screw must be confirmed against its thread-forming method and application.
Select by Substrate and Assembly Condition
| Assembly Condition | Selection Starting Point | Confirm Before Use |
|---|---|---|
| Thin metal sheet with a prepared or pierceable entry condition | Type A or Type AB | Sheet thickness, pilot hole, point design, thread engagement, and head clearance |
| Prepared hole requiring a blunt-point tapping screw | Type B | Pilot-hole diameter, substrate, thickness, and installation method |
| Controlled thread cutting is acceptable | Thread-cutting screw | Cutting geometry, chip management, substrate, and hole preparation |
| Chip generation should be limited in a compatible material | Thread-forming or thread-rolling screw | Substrate ductility, pilot hole, torque, and joint validation |
| Molded plastic boss or plastic housing | Plastic self-tapping screw | Resin, boss wall, pilot hole, engagement length, and repeated assembly |
| Entry point requires a sealing washer | Sealing-washer self-tapping screw | Washer compatibility, contact surface, compression, and environment |
| Compact electronic or instrument assembly | Micro self-tapping screw | Head dimensions, pilot-hole control, driver access, and nearby components |
| Standard configuration does not match the assembly | Custom self-tapping screw | Drawing, sample, substrate, critical dimensions, material, finish, and quantity |
Self-drilling screws should be evaluated separately when the fastener must drill its own pilot hole in the substrate.
Standard-Based and Custom Self-Tapping Screw Projects
TIGHTU manufactures fasteners according to DIN, ISO, and ANSI requirements and supports OEM/ODM projects based on customer drawings, samples, material requirements, and application conditions.
For a self-tapping screw, the substrate and pilot-hole condition are part of the specification. A thread designation alone is not enough to determine whether the screw will form the required mating thread in the assembly.
Include the following information when available:
- Applicable standard or controlled drawing
- Substrate and material thickness
- Pilot-hole diameter and preparation method
- Tapping method or screw type
- Thread diameter, pitch, and engagement length
- Point, head style, and drive
- Screw material and finish
- Critical dimensions and assembly restrictions
- Required quantity and packaging
- Inspection or documentation requirements
What TIGHTU Brings to a Self-Tapping Screw Project
Multiple Tapping Methods
The product structure covers pointed tapping screws, blunt-point Type B screws, thread-cutting, thread-forming, plastic, sealing-washer, micro, and custom configurations.
Substrate-Based Specification Review
The screw type can be reviewed together with the substrate, pilot hole, thread engagement, head clearance, driver access, material, and finish.
Drawing- and Sample-Based Customization
When a catalog-style screw does not match the assembly, TIGHTU can review customer drawings, physical samples, critical dimensions, and application requirements for OEM/ODM development.
Related Fastener Scope
TIGHTU’s broader product portfolio includes machine screws, self-drilling screws, SEMS screws, set screws, socket screws, bolts, nuts, washers, threaded rods and studs, pins, rivets, and threaded inserts.
Fastener Manufacturing in Nantong, China
TIGHTU is a fastener manufacturer and supplier based in Nantong, Jiangsu, China. The company supplies standard and custom fastening products for customers in international industrial markets.
Self-tapping screw projects can be reviewed around the applicable standard, controlled drawing, substrate, pilot hole, thread-forming method, material, finish, and assembly requirement. Product-specific dimensions, inspection criteria, documentation, quantity, packaging, and delivery terms are confirmed for the quoted part.
Self-Tapping Screw Selection Guide
What is the difference between a self-tapping screw and a self-drilling screw?
A self-tapping screw creates a mating thread in compatible material, often using a prepared pilot hole. A self-drilling screw has a drill-shaped point intended to create the pilot hole before forming the thread. Some self-drilling screws are also self-tapping, but an ordinary self-tapping screw should not be assumed to have drilling capability.
Do all self-tapping screws require a pilot hole?
Many self-tapping screws require a drilled, punched, or molded pilot hole. Some pointed designs can pierce certain thin or soft materials, but this depends on the screw geometry and substrate. Confirm the installation method instead of relying only on the term “self-tapping.”
What is the difference between Type A, Type AB, and Type B screws?
Type A and Type AB generally use pointed ends and spaced threads for suitable thin materials. Type B generally uses a blunt point and entering threads for an appropriately prepared hole. The exact designation, pilot-hole recommendation, and substrate limits should follow the applicable standard or controlled drawing.
When should I choose thread-cutting instead of thread-forming?
Choose the mechanism according to the substrate and assembly process. Thread-cutting screws remove material and may generate chips. Thread-forming screws displace compatible material and can avoid conventional cutting chips, but they require suitable material behavior and pilot-hole control.
How is the correct pilot-hole size selected?
Pilot-hole selection depends on the screw diameter, thread geometry, substrate, material thickness, required engagement, and installation method. Use product-specific technical data, an applicable standard, or validated assembly testing rather than applying one hole-size rule to every material.
Can self-tapping screws be used in plastic?
Yes, when the thread profile, pilot hole, boss design, engagement length, and plastic material are compatible. A screw intended for thin metal should not automatically be treated as suitable for a molded plastic boss.
What information supports a custom quotation?
Provide the drawing or standard, substrate, pilot-hole details, tapping method, thread, point, head and drive, material, finish, critical dimensions, quantity, packaging, and application conditions. A physical sample can also support review when a controlled drawing is unavailable.
Related Fastener Options
Self-Drilling Screws
Drill-point screws for compatible applications where the fastener must create the pilot hole before forming the thread.
Discuss Self-Drilling ScrewsMachine Screws
Externally threaded screws designed to engage an existing tapped hole or nut.
Discuss Machine ScrewsMicro Screws
Small fasteners for electronics, instruments, and compact assemblies.
Discuss Micro ScrewsCustom Screws
Drawing- and sample-based development for nonstandard screw geometry, material, thread, or finish requirements.
Discuss Custom ScrewsSEMS Screws
Screws supplied with one or more preassembled washers for applicable assembly processes.
Discuss SEMS ScrewsSet Screws
Headless or low-profile screws used to secure components such as collars, gears, and hubs.
Discuss Set ScrewsSend Your Self-Tapping Screw Requirements
Share the information already available for your project. TIGHTU can use it to review the tapping method, substrate compatibility, standard or custom configuration, and quotation requirements.
