Hex Flange Head Self Tapping Screw (Саморез) – Type 17 Point & DIN 6928

Product Overview: The Ultimate Fastener for Wood and Sheet Metal

Our Hex Flange Head Self Tapping Screws are high-performance fasteners designed to tap their own threads into material as they are driven. Unlike standard screws that require a pre-drilled hole and a matching nut, these screws are engineered to create a secure, vibration-resistant joint in a single operation.

This specific model features a Type 17 Point (also known as an auger point). This distinct flute cut at the tip allows the screw to act like a drill bit, displacing wood fibers rather than crushing them. This significantly reduces the torque required for installation and eliminates the risk of splitting the wood, even when working near the edge of a board.

Russian Name: Саморез с шестигранной головкой / Шуруп-глухарь

Standard: DIN 6928, ANSI B18.2.1

Head Style: Indented Hex Washer Head (HWH)

Engineering Design & Features

1. The Hex Flange Advantage

Why do we use a Hex Flange head instead of a simple Pan head?

• Integrated Washer: The “Flange” acts as a built-in washer. It increases the surface area under the screw head, distributing the clamping load over a wider area. This protects the base material from damage and prevents the screw from pulling through soft materials like thin sheet metal or plastic.

• High Torque Transmission: The hexagonal shape allows for the use of a Self-tapping screw driver or impact wrench. Unlike Phillips drives that can “cam-out” (slip) under high pressure, the hex drive ensures 100% torque transfer, making it ideal for tough jobs.

2. Type 17 “Auger” Point Explained

The “Type 17” designation refers to the specialized slot cut into the threaded point of the screw.

• Chip Removal: As the screw rotates, the slot acts as a channel to eject wood chips and debris, preventing the screw from binding or overheating.

• No Pre-Drilling: For most softwoods and thin gauge metals, the Type 17 point eliminates the need for a pilot hole, saving you 50% of the installation time on roofing or decking projects.

3. Case Hardened Durability

All our tapping screws undergo a rigorous Case Hardening process.

• The Process: We heat the C1022A steel screws in a carbon-rich atmosphere and then rapidly quench them.

• The Result: This creates a screw with a dual personality: a super-hard outer “case” (surface) that can cut into steel without dulling, and a softer, ductile “core” that prevents the screw from snapping under shear loads or building movement.

Technical Specifications

Property	Specification Details
Product Name	Hex Flange Tapping Screw, Sheet Metal Screw
Russian Name	Саморез кровельный (без шайбы)
Material	C1022A Hardened Carbon Steel
Diameter	#8 (4.2mm), #10 (4.8mm), #12 (5.5mm), #14 (6.3mm)
Length	19mm, 25mm, 32mm, 50mm … up to 150mm
Point Type	Type 17 (Cut Point), Type A (Sharp Point), Type AB
Head Type	Hex Flange Head (8mm or 10mm A/F)
Core Hardness	HV 270 – 390
Surface Hardness	HV 560 Min
Finish	Yellow Zinc Plated (YZP), Blue Zinc, Ruspert (Ceramic)
Standard	DIN 6928, ISO 7053

Application Scenarios

• Metal Roofing: Securing metal sheets to timber purlins (often used with an EPDM bonded washer).

• Pole Barn Construction: Attaching steel siding to wooden frames.

• HVAC Ducting: Connecting sheet metal ducts where a high-torque seal is needed.

• Decking: Fastening pressure-treated lumber where splitting is a concern.

Manufacturing Excellence

At HDBolt, quality is not an accident.

• Salt Spray Test: Our Yellow Zinc Plating is tested to withstand 48-72 hours of neutral salt spray without Red Rust, ensuring longevity in outdoor environments.

• Drive Test: Every batch is tested to ensure the hex head fits perfectly with standard magnetic nut setters (8mm or 10mm) without wobbling.

• Drill Speed Test: We measure how many seconds it takes for the Type 17 point to penetrate standard hardwood. If it’s too slow, the batch is rejected.

Get a Quote for Bulk Supply

We specialize in supplying full container loads of self-tapping screws to distributors in Russia, Poland, and South America. We can package these in small color boxes (500 pcs) with your brand logo or in bulk 25kg cartons.

To get our latest price list for Type 17 screws, please Contact Us and let us know your required sizes and monthly quantity.