Description
Reviews
| Brand | - |
| Category | Standard Parts, Components & Industrial Consumables / Turnbuckle |
| Origin | - |
| Material | High-Carbon Steel with Black Oxide Finish |
| Head Type | Round Head with Integrated Large Flat Washer |
| Drive Style | Cross Phillips (PH2) |
| Point Type | Drill Tail (Self-Drilling) |
| Thread Type | Coarse Self-Tapping Thread |
| Surface Treatment | Rust-Proof Black Coating |
| Application | Metal Framing, HVAC Ductwork, and Steel Studs |
| Packaging | Factory Direct Bulk Box (500 Pieces) |
| Compatibility | Compatible with Standard Power Drills and Impact Drivers |
| Origin | Direct from Manufacturing Facility |
Anonymous
Mar 20, 2026
Rating: 4/5
Good quality, fast shipping
The screws are sharp and the heads don't strip easily under high torque. The large flat head provides excellent clamping force. Just wish they came in smaller quantities for home users.
Anonymous
Mar 18, 2026
Rating: 4/5
Great value for bulk buying
Bought these for a large warehouse project. They hold very well and the self-drilling tip works as advertised on 20-gauge steel. One star off because the box was slightly dented on arrival, but the screws were fine.
Anonymous
Mar 16, 2026
Rating: 5/5
Perfect for metal framing jobs
These screws cut through steel studs like butter. The integrated washer saves a ton of time since I don't have to fumble with separate washers. The black finish looks professional too.
Anonymous
Mar 15, 2026
Rating: 5/5
No pre-drilling needed
The drill tail design is legitimate. I skipped the pilot hole step entirely on my last job, which sped up installation by at least 30%. Highly recommend for HVAC work.
Anonymous
Mar 07, 2026
Rating: 5/5
Strong hold and rust resistant
Used these for an outdoor shed frame. The rust-proof coating seems durable, and they haven't shown any signs of corrosion after a few weeks of rain. Very satisfied.
Anonymous
Mar 01, 2026
Rating: 5/5
Best screws for the price
Factory direct pricing makes these unbeatable. Quality is consistent across the whole box. The cross drive fits snugly in my impact driver bits.
Q: What thickness of metal can these screws penetrate without a pilot hole?
A: These self-drilling screws are designed to penetrate up to 3mm (approximately 11-12 gauge) of mild steel without the need for a pre-drilled pilot hole.
Q: Do I need a special drill bit to use these?
A: No special bit is required. These screws feature a standard Phillips (PH2) head and can be driven using any standard power drill or impact driver with a PH2 bit.
Q: Is the washer removable or is it fixed to the screw?
A: The large flat washer is integrated and fixed to the screw head. It is designed to rotate freely during installation to prevent cam-out and ensure even pressure distribution.
Q: What is the tensile strength of these screws?
A: These high-carbon steel screws typically offer a tensile strength of approximately 600 MPa, making them suitable for structural framing and heavy-duty fastening applications.
Q: Are these suitable for outdoor applications?
A: Yes, the black oxide finish provides rust-resistant properties suitable for outdoor use, though we recommend additional sealing for areas with extreme moisture or salt exposure.
Stainless Steel Fish Tank Converter - Bucket to Aquarium Adapter with Inverted Stand and Faucet Spout for Mineral Water Jugs
$13.58
Non-woven Cleaning Cloths, Lint-free Wiping Rags, Oil-absorbing Paper, Machine Cleaning Cloth, Dust Removal Cloth for Subway Use (No Washing Required)
$138.00
Large Paint Brush Set - Watercolor Pen Kit for Children's Day Art and Drawing
$31.25
Foldable Car Tire Stone Removal Tool, Explosion-Proof Scraper Hook for Extracting Pebbles from Tires
$19.53
Black Swan Watercolor, Gouache, and Acrylic Paint Brush Set - Professional Art Painting Tools for Numbered Paint-by-Number Kits
$6.80
Jiangchuan 800 Roll-to-Roll Oil-Heated Roller Heat Transfer Machine – Digital Sublimation Printer for Curtain Fabric Rolls
$147,743.75
Traditional Handcrafted Wooden Rattle for Newborns – Safe for Teething, Intangible Cultural Heritage Toy
$10.10
All-Season Quiet and Comfortable Vacuum Tires for Buick Enclave 2013-2014 - Custom Fit, Wear-Resistant
$458.00
Mia Core Paper Stump and Blending Knife Set, Double-Ended Blending Pen for Sketching, Art Student Drawing Tools (S/M/L)
$4.28
Feileniao Gongbi Painting Draft Sheets – Pre-Outlined Bird-and-Flower Designs on Sized Xuan Paper for Color Filling Practice
$8.42
Automatic Retractable Air Hose Reel, Electronic Drum, Water Drum, Yarn Clamp, Air Pump Hose for Auto Repair, Beauty, Gardening, and Washing
$280.00
LA Curved Surface Screen Printing Machine - Automatic Cup Printer, Cylindrical Net Printer for Cosmetic Bottles
$26,750.00
Bathroom Toilet Storage Rack - Over-Toilet Shelf for Bathroom, Restroom, Washing Machine with Flip Lid - Space-Saving Organizer
$59.00
Heavy-Duty Chain Slings for Lifting Rebar and Steel - Manganese Steel Lifting Chains
$113.00
Toilet Storage Rack - No-Drill Bathroom Organizer for Restrooms and Washrooms
$14.80
Shuhai Blanching and Scalding Machine Fully Automatic Fresh Steam FVJ Vegetable Cooking and Cooling Equipment Enoki Mushroom Shiitake Blanching Flow Cooling
$18,900.00
PELICAN 1020 Waterproof Case - Compact Protective Box for Earphones with Free Shipping
$40.00
Marie's Collapsible Brush Washing Bucket Art TEP Watercolor Chinese Painting Brush Rinser Portable Silicone Extendable Small Paint Washing Bucket for Art Students
$12.50
Duosoduoxi Black Series Paper Blending Stumps (6-Pack) - Elastic Xuan Paper Tools for Art Exams and Sketch Highlighting
$5.10
Factory Direct 502 Super Glue - Instant Adhesive, 3-Second Bond, High-Strength Fast-Drying Glue for Furniture and Wood Repair
$1.28
NORTON Industrial Red Scouring Pad for Stainless Steel Brushing, Polishing, and Rust Removal – Fine Grit Abrasive Cloth
$17.50
Bucket Pack Soft-Tip Glitter Markers, Non-Toxic Washable Color Pens for Student Art and Drawing, Gel Highlighters
$2.99
6-Piece Nylon Brush Set for DIY Aromatherapy Candles, Plaster Coloring, Outlining, Detailing, Gouache, Acrylics, and Baking
$1.28
Activated Carbon Filter, Quartz Sand Filter, Fiber Ball Filter, Wastewater Filter, Environmental Protection Equipment
$45,000.00
Factory Direct Vegetable Filling Processing Equipment - TMH Dumpling and Bun Filling Chopper for Cabbage and Vegetables
$12,155.40
Hairline Transplant | No-Shave Hair Restoration | 1-2000 Grafts with Velvet Texture & Pain Management by Medical Director
$29,800.00
Manufacturer Mini Donut Machine - Snack Food Equipment, 304 Stainless Steel Donut Maker for Puffed Foods
$3,760.00
Inverted Water Dispenser Stand for Large Bottles - Manual Pump Extractor for Mineral and Purified Water
$31.30
Press-to-Empty Hands-Free Hanging Sink Strainer Basket for Food Residue Separation
$7.48
Car Tire Stone Hook Stone Removal Tool Rust-Resistant Hook Multi-Function Tire Pick Scrape Stone Remover
$8.33
