TOBO GROUP LTD
| Payment Terms | T/T, Western Union |
| Supply Ability | 15tons per month |
| Delivery Time | 15-30 Workdays |
| Packaging Details | Standard Shipping Package |
| Product name | Hex Washer Head Self Drilling Screws |
| Thread Count | ANSI B 16.9, ASTM A420 |
| Head Style | Hex |
| Type Of Drive | Phillips pozi, slot ,torx ，square,etc |
| Type | self drilling screw |
| Quality | High lever |
| Tensilestrength | 800 MPa |
| Finish | Bright |
| Coating | Zinc Plated |
| Brand Name | TOBO |
| Model Number | Hex Washer Head Self Drilling Screws |
| Certification | ISO/TUV/SGS |
| Place of Origin | Shanghai, China |
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Product Specification
| Payment Terms | T/T, Western Union | Supply Ability | 15tons per month |
| Delivery Time | 15-30 Workdays | Packaging Details | Standard Shipping Package |
| Product name | Hex Washer Head Self Drilling Screws | Thread Count | ANSI B 16.9, ASTM A420 |
| Head Style | Hex | Type Of Drive | Phillips pozi, slot ,torx ，square,etc |
| Type | self drilling screw | Quality | High lever |
| Tensilestrength | 800 MPa | Finish | Bright |
| Coating | Zinc Plated | Brand Name | TOBO |
| Model Number | Hex Washer Head Self Drilling Screws | Certification | ISO/TUV/SGS |
| Place of Origin | Shanghai, China | ||
| High Light | Hex washer head self drilling screws ，Carbon steel self drilling screws ，Unified fine thread metal screws | ||
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.
| Parameter | Details |
|---|---|
| Product Name | Hex Washer Head Self Drilling Screw (HWH) |
| Thread Size | #12-24 UNF (Unified Fine) |
| Outer Diameter | 5.5 mm |
| Drill Point Type | Type 3 (#3) – for material thickness 2.8 – 5.3 mm |
| Drill Point Hardness | 55 – 60 HRC |
| Core Hardness | 35 – 45 HRC (case hardened) |
| Length Range | 19 mm (3/4") to 155 mm (6") – see table below |
| Head Style | Hex Washer Head (standard 5/16" hex) |
| Drive Type | Hex socket (power tool compatible) |
| Materials | Carbon steel (zinc/yellow/Geomet®) / Stainless steel 410 / 304 / 316 |
| Finishes / Colors | Zinc plated (silver), Yellow dichromate (gold), Black oxide (black), Geomet® (gray), PTFE (dark gray) |
| Material Thickness Range (Type 3) | 2.8 mm – 5.3 mm (14 ga – 10 ga steel) |
| Tensile Strength | 100,000 – 150,000 psi (depending on grade) |
| Torque Strength | > 12 N·m (no head stripping) |
| Pull-Out Resistance | > 800 N in 3 mm steel |
| Standards | ASTM C954, SAE J78, DIN 7504 |
| Packaging | Bulk boxes (500–2,000 pcs), strip collated for auto-feed |
| PART NO. | SIZE (INCH) | DIA. (MM) | LENGTH (MM) | POINT NO. | MATERIAL THICKNESS (MM) |
|---|---|---|---|---|---|
| HWH12L19P5 | #12-24 x 3/4" | 5.5 | 19 | #3 | 2.8-5.3 |
| HWH12L25P5 | #12-24 x 1" | 5.5 | 25 | #3 | 2.8-5.3 |
| HWH12L35P5 | #12-24 x 1-3/8" | 5.5 | 35 | #3 | 2.8-5.3 |
| HWH12L38P5 | #12-24 x 1-1/2" | 5.5 | 38 | #3 | 2.8-5.3 |
| HWH12L45P5 | #12-24 x 1-3/4" | 5.5 | 45 | #3 | 2.8-5.3 |
| HWH12L50P5 | #12-24 x 2" | 5.5 | 50 | #3 | 2.8-5.3 |
| HWH12L55P5 | #12-24 x 2-1/8" | 5.5 | 55 | #3 | 2.8-5.3 |
| HWH12L63P5 | #12-24 x 2-1/2" | 5.5 | 63 | #3 | 2.8-5.3 |
| HWH12L75P5 | #12-24 x 3" | 5.5 | 75 | #3 | 2.8-5.3 |
| HWH12L90P5 | #12-24 x 3-1/2" | 5.5 | 90 | #3 | 2.8-5.3 |
| HWH12L100P5 | #12-24 x 4" | 5.5 | 100 | #3 | 2.8-5.3 |
| HWH12L125P5 | #12-24 x 5" | 5.5 | 125 | #3 | 2.8-5.3 |
| HWH12L155P5 | #12-24 x 6" | 5.5 | 155 | #3 | 2.8-5.3 |
Metal Construction & Steel Framing rely on these #12-24 self drilling screws for fast, secure connections in light gauge steel.
Attaching drywall tracks and metal studs to runners
Securing furring channels to structural steel members
Fastening metal decking and floor underlayment
Installing suspended ceiling grid systems
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).
Corrugated steel roof panel to purlin fastening
Standing seam roof clip attachment
Wall panel and metal siding installation
Flashing, trim, and gutter securement
Insulated metal panel (IMP) joining
Agricultural and industrial building cladding
HVAC & Ductwork benefit from chip-free drilling and fast installation.
Round and rectangular duct seam closure
Hanger strap and support bracket attachment
Access door frame mounting to duct walls
Plenum and air handler assembly
Chimney liner and flue pipe fastening
Vibration isolator bracket connections
Automotive & Transportation use these screws for interior and underbody metal assemblies.
Interior trim panel to steel body frame
Underbody splash shield attachment
Bracket and module mounting in engine compartments
Trailer and cargo container assembly
Truck bed liner and tool box installation
RV and camper metal framing connections
Industrial & General Manufacturing choose #12-24 self drilling screws for high-strength sheet metal assembly.
Electrical enclosure and control panel backplate mounting
Machine guard and safety cover fastening
Industrial shelving and racking assembly
Furniture frame construction (metal to metal)
Sign and display fixture fabrication
Storage cabinet and locker assembly lines
Select Hex Washer Head Self Drilling Metal Screws (#12-24 Type 3) for faster installation, stronger joints, and lower labor costs.
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.
Single Tool Operation: One power driver drills and drives – no bit changes, no drill motors needed.
Clean, Chip-Free Work Area: Flutes eject chips away from the hole, leaving no metal debris on surfaces or inside ducts.
Consistent Thread Engagement: #12-24 UNF threads tap immediately after drilling, creating full profile engagement for maximum pull-out resistance (>800 N).
Anti-Cam-Out Design: Hex washer head accepts standard 5/16" hex sockets, providing high torque transfer without stripping.
Wide Length Range: From 19 mm (3/4") to 155 mm (6") – one thread and point type covers multiple material stack-ups.
Corrosion Options: Zinc plated (indoor), yellow dichromate (humidity), Geomet® (1000+ hour salt spray), and stainless 304/316
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.
Company Details
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
2010
Total Annual:
5000000-6000000
Ecer Certification：
Verified Supplier
TOBO GROUP LTD is a professional fastener manufacturer and exporter in China. We produce various types of fasteners (include non-standard) in GB, DIN, BS, ANSI/ASME, IFI, ISO, and JIS with 300 tons of monthly productivity. Our main products are bolts, nuts, screws, threaded rods, plain was... TOBO GROUP LTD is a professional fastener manufacturer and exporter in China. We produce various types of fasteners (include non-standard) in GB, DIN, BS, ANSI/ASME, IFI, ISO, and JIS with 300 tons of monthly productivity. Our main products are bolts, nuts, screws, threaded rods, plain was...
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