Minerallac 39509 Hex Washer Head Tek Screw Kit, Zinc Plated
The Minerallac 39509 Hex Washer Head Tekscrew Kit is a complete, job-ready assortment of self-drilling #8 and #10 hex washer head Tek screws designed for electricians and contractors who need multiple fastener sizes on hand without carrying separate boxes. This kit bundles #8 x 1/2", #8 x 3/4", #8 x 1", #10 x 1/2", #10 x 3/4", and #10 x 1" hex washer head Tek screws, all finished in zinc plating for corrosion resistance, and includes both 1/4" and 5/16" hex drivers so installers are equipped to drive every screw included in the kit. The hex washer head design provides a wide bearing surface for secure fastening into metal studs, boxes, brackets, and light-gauge steel without the need for pre-drilling, making this kit a practical solution for electrical, HVAC, and general metal-to-metal fastening applications where quick, self-tapping installation is required.
Key Features
- Multi-Size Assortment: Includes #8 x 1/2" (100 pcs), #8 x 3/4" (50 pcs), #8 x 1" (40 pcs), #10 x 1/2" (50 pcs), #10 x 3/4" (35 pcs), and #10 x 1" (30 pcs) hex washer head Tek screws in one convenient kit.
- Durable Construction: Zinc plated finish provides corrosion resistance for reliable long-term fastening performance.
- Self-Drilling Tek Point: Tekscrew design allows the screws to drill and tap their own hole into metal, eliminating the need for pre-drilling in many applications.
- Hex Washer Head: Wide bearing surface distributes clamping load and resists pull-through on thin-gauge metal.
- Included Drivers: Kit includes 1/4" and 5/16" hex drivers sized to match the #8 and #10 screw heads included, so no separate driver purchase is needed.
- All-In-One Kit Format: Consolidates multiple screw sizes and lengths plus drivers into a single kit for electricians, installers, and maintenance crews who need assorted Tek screws on the job.
Technical Specifications
- Screw Sizes: #8 and #10
- Head Type: Hex Washer Head
- Finish: Zinc Plated
- Driver Sizes Included: 1/4" and 5/16"
- Kit Contents: 8 x 1/2" (100), 8 x 3/4" (50), 8 x 1" (40), 10 x 1/2" (50), 10 x 3/4" (35), 10 x 1" (30)
Typical Applications
- Electrical Box and Bracket Mounting to Metal Studs
- Light-Gauge Steel Framing Assembly
- HVAC Duct and Sheet Metal Fastening
- General Metal-to-Metal Fastening on Job Sites
- Maintenance and Service Vehicle Fastener Restocking
Why Minerallac?
Minerallac fasteners are built to deliver dependable, corrosion-resistant performance for electrical and construction professionals. This zinc plated Hex Washer Head Tekscrew Kit gives installers a ready assortment of the most commonly needed #8 and #10 screw sizes along with the correct drivers, helping crews stay organized and equipped for a variety of self-drilling fastening tasks on the job site.
Manufacturer Resources
Product Specs
- list_batch:
- MIN-20260924
- Product Type:
- Tek Screw
- Product Finish:
- Zinc Plated
- Configuration:
- Hex Washer Head
- Department:
- Electrical
- Product Subgroup:
- Self-Tapping Screws
- Product Material:
- Steel
- Product Size:
- 1/2"
- Product Group:
- Hangers, Supports & Fasteners
Minerallac 39509 – Frequently Asked Questions
1) What screw sizes and quantities come in the Minerallac 39509 Tek screw kit?
The 39509 kit carries six size/length combinations of self-drilling hex washer head screws: #8 x 1/2 inch (100 pieces), #8 x 3/4 inch (50), #8 x 1 inch (40), #10 x 1/2 inch (50), #10 x 3/4 inch (35), and #10 x 1 inch (30). That is 305 screws total, plus drivers.
2) Do I need to buy separate drivers for these Tek screws?
No. Both a 1/4 inch and a 5/16 inch hex driver are included, which cover the head sizes on the #8 and #10 hex washer head screws in the kit. You can drive everything in the box with what ships in it.
3) Will these screws go into metal studs without pre-drilling?
Yes, these are self-drilling Tek point screws, so they drill and tap their own hole in metal studs, boxes, brackets, and light-gauge steel. No pilot hole needed in most of those applications. For heavier structural steel, check that your gauge is within what a #8 or #10 self-drilling point can cut.
4) Are these Tek screws corrosion resistant enough for damp or exterior-adjacent work?
The screws are steel with a zinc plated finish, which gives general corrosion resistance for indoor and protected applications such as stud framing, boxes, and duct. Zinc plating is not a coastal or fully exposed exterior coating, so for permanent outdoor or wet locations a stainless or coated exterior fastener is the better call.
5) Why choose a hex washer head over a pan or truss head for sheet metal?
The hex washer head gives a wide bearing surface that spreads the clamping load and resists pull-through on thin-gauge metal, and the hex drive lets you run it with an impact or drill-mounted driver without cam-out. That is why it is the usual head for mounting electrical boxes and brackets to metal studs and for HVAC duct work.
6) Is a single Minerallac 39509 kit enough to stock a service van or MRO cart?
That is what it is built for. One kit covers the two most-used diameters, #8 and #10, in 1/2, 3/4, and 1 inch lengths with both matching drivers, so a crew is not carrying six separate boxes. For repetitive production work on one size, buy that size in bulk and keep the kit as the catch-all assortment.
7) Which length should I use for fastening a bracket to a metal stud?
Pick the length so the point fully penetrates and still leaves thread engagement without excess sticking through. For a thin bracket on 25-gauge to 20-gauge stud, the 1/2 inch #8 or #10 works; stacked material, a strap over a plate, or anything thicker is where the 3/4 inch and 1 inch screws in the kit come in. Step up to #10 when you want more pull-out resistance in the same hole.
8) Can I use the Minerallac 39509 screws for HVAC duct and sheet metal, or is it electrical only?
Both. The kit is sold into the electrical trade for box and bracket mounting to metal studs, but the same self-drilling hex washer head screws are standard for HVAC duct and sheet metal fastening and general metal-to-metal work on site.
9) What is the manufacturer part number and country of origin on this Minerallac Tek screw kit?
Order it as Minerallac 39509. The kit is made in Taiwan.
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Does the Minerallac 39509 come with a warranty?
Absolutely. The Minerallac 39509 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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