Product Description:

Self Drilling Metal Screws (Hex Washer Head – #12-24 Type 3)

Product Summary

Our Hex Washer Head Self Drilling Metal Screws combine drilling, tapping, and fastening into a single operation. The #12-24 thread size and Type 3 drill point are specifically engineered for steel thicknesses from 2.8 mm to 5.3 mm (14 to 10 gauge). The hardened drill point eliminates pre-drilling, while the hex washer head provides high torque transfer without cam-out. Available in zinc plated, yellow dichromate, stainless steel, and premium anti-corrosion coatings, these screws are the standard choice for metal framing, roofing, HVAC, and industrial assembly.

Technical Specifications

Dimensional Table (Part Numbers)

Product Applications

Metal Construction & Steel Framing rely on these #12-24 self drilling screws for fast, secure connections in light gauge steel.

1. Attaching drywall tracks and metal studs to runners

2. Securing furring channels to structural steel members

3. Fastening metal decking and floor underlayment

4. Installing suspended ceiling grid systems

5. Bracing and bridging connections in cold-formed steel framing

Metal Roofing & Siding projects demand weather-resistant self drilling screws with sealing washers (EPDM or neoprene).

1. Corrugated steel roof panel to purlin fastening

2. Standing seam roof clip attachment

3. Wall panel and metal siding installation

4. Flashing, trim, and gutter securement

5. Insulated metal panel (IMP) joining

6. Agricultural and industrial building cladding

HVAC & Ductwork benefit from chip-free drilling and fast installation.

1. Round and rectangular duct seam closure

2. Hanger strap and support bracket attachment

3. Access door frame mounting to duct walls

4. Plenum and air handler assembly

5. Chimney liner and flue pipe fastening

6. Vibration isolator bracket connections

Automotive & Transportation use these screws for interior and underbody metal assemblies.

1. Interior trim panel to steel body frame

2. Underbody splash shield attachment

3. Bracket and module mounting in engine compartments

4. Trailer and cargo container assembly

5. Truck bed liner and tool box installation

6. RV and camper metal framing connections

Industrial & General Manufacturing choose #12-24 self drilling screws for high-strength sheet metal assembly.

1. Electrical enclosure and control panel backplate mounting

2. Machine guard and safety cover fastening

3. Industrial shelving and racking assembly

4. Furniture frame construction (metal to metal)

5. Sign and display fixture fabrication

6. Storage cabinet and locker assembly lines

Product Advantages

Select Hex Washer Head Self Drilling Metal Screws (#12-24 Type 3) for faster installation, stronger joints, and lower labor costs.

1. No Pre-Drilling Required: The Type 3 hardened drill point cuts through 2.8–5.3 mm steel in under one second, eliminating pilot holes.

2. Single Tool Operation: One power driver drills and drives – no bit changes, no drill motors needed.

3. Clean, Chip-Free Work Area: Flutes eject chips away from the hole, leaving no metal debris on surfaces or inside ducts.

4. Consistent Thread Engagement: #12-24 UNF threads tap immediately after drilling, creating full profile engagement for maximum pull-out resistance (>800 N).

5. Anti-Cam-Out Design: Hex washer head accepts standard 5/16" hex sockets, providing high torque transfer without stripping.

6. Wide Length Range: From 19 mm (3/4") to 155 mm (6") – one thread and point type covers multiple material stack-ups.

7. Corrosion Options: Zinc plated (indoor), yellow dichromate (humidity), Geomet® (1000+ hour salt spray), and stainless 304/316 (marine).

8. Material Versatility: Drills through carbon steel, galvanized steel, aluminum, copper, and even stainless steel (with proper grade).

FAQ

1. Are you trading company or manufacturer ?
We are manufacturer ,You can see the certification.
2. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.