304/316 Stainless Steel Bi-metal #5 drill tip self drilling screw
Stainless steel 410, 304 and 316
StainGrip® 304 / 316 Stainless Steel Bi-Metal Heavy-Duty #5 Drill Point Self-Drilling Screws are ultra-heavy-duty fasteners specifically engineered to pierce thick structural steel members while maintaining long-term outdoor corrosion resistance. By fusing an austenitic stainless steel body (SS304 or SS316) with an extended, heat-treated alloy steel #5 drill tip (Tek 5) through precision friction welding, these fasteners combine extreme drilling capability with complete immunity to rust and galvanic degradation.
Key Features & Technical Benefits
Bi-Metal Fusion Technology:
Head & Upper Body: Manufactured from premium SS304 or marine-grade SS316 stainless steel for high corrosion resistance, preventing structural head failure, rust staining, and atmospheric degradation.
Drill Tip: Precision-welded hardened alloy carbon steel tip provides the hardness required to cut through thick structural steel plates without dulling, melting, or snapping.
Extreme Extended #5 Drill Point (Tek 5): Features a long, high-efficiency cutting flute specifically designed to drill through heavy steel sections up to 12.0 mm (approx. 1/2") thick in a single operation without pre-drilled pilot holes.
Superior Anti-Corrosion Performance: Unlike 410 stainless steel, the SS304/SS316 body ensures high protection against harsh outdoor environments, coastal salt spray, industrial pollutants, and chemical wood treatments.
High Torque & Clamp Transmission: Available with hex washer heads or heavy-duty drive systems, ensuring maximum torque delivery and joint clamping force during high-speed installation into structural steel framing.
Optional Protective Barrier Coating: Often finished with a dual-layer Ruspert or silver slide coating to eliminate bimetallic reaction (galvanic corrosion) between the steel substructure and the stainless shank.
Technical Specifications
Feature | Specification |
Body Material | SS304 (A2) / SS316 (A4) Marine Grade Stainless Steel |
Drill Tip Material | Heat-Treated Hardened Alloy Carbon Steel |
Drill Point Rating | Extended #5 Point (Tek 5 Point) |
Max Drilling Capacity | Up to 12.0 mm (approx. 1/2") Thick Structural Steel |
Head Options | Hex Washer Head (with optional EPDM sealing washer), Wafer Head, Countersunk |
Finishing/Coating | Ruspert / Silver Barrier Coating / Zinc Plated |
Primary Applications | Heavy Structural Steel Framing, Steel Beams, Coastal & Marine Construction, Heavy Equipment Mounts |
Stainless Steel Grades:
o 304 / 18-8 Stainless Steel: Excellent corrosion resistance, ideal for general applications.
o 305 Stainless Steel: High nickel content, non-magnetic, ideal for cold forming and deep drawing.
o 316 Stainless Steel: Marine-grade, superior resistance to salt water and chemicals.
Applicable Standards:
o Dimensional: ASME B18.6.3 / ASME B18.2.1 / ANSI
o Material / Physical: ASTM F593 (Group 1: 304/305, Group 2: 316) / ASTM A240
Certifications: MTR (Material Test Report) / Mill Certs available upon request.
Fast Dispatch for Stocked Items: Ready-to-ship inventory available for quick order dispatch.
Factory-Direct Bulk Production: Competitive direct-from-factory lead times for wholesale and custom orders.
Flexible International Shipping: Comprehensive shipping options including FOB, CIF, and DDP (Door-to-Door with duties paid).
Tracking & Logistics: Full shipment tracking provided from factory loading to final delivery.
We offer full OEM/ODM manufacturing to meet your specific application needs.
Head Marking & Design: Custom head logo, drive type, and head shape.
Dimensions & Tolerances: Custom sizes according to ASME standards or customer drawings.
Head Painting & Coating: Head color matching, passivation, and specialty finishes.
Private Label Packaging: Custom inner/outer box design, polybags, and barcode labeling.
Samples: Custom samples and initial inspection reports available before full production.
Flexible custom packaging solutions available for both wholesale and retail markets:
Multiple Packaging Options: From small polybags and small inner boxes to industrial bulk packing.
Custom Printing & Logo: Custom box design, printed logos, and brand artwork.
Labeling & Barcodes: Private labels, UPC/EAN barcodes, part numbers, and shipping marks.
