Minerallac #8-18 x 1" Tek Scre...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$50.13
$12.00
Minerallac #8-18 x 1" Tek Screws with Hex Washer Head, Zinc Plated Steel Construction, 100 Pack

Minerallac #8-18 x 1" Tek Screws with Hex Washer Head, Zinc Plated Steel Construction, 100 Pack

(No reviews yet) Write a Review

Model: 78816J

In Stock (leaves warehouse same day if ordered before 3pm ET)

$50.13
$12.00
Adding to cart… The item has been added
Free Shipping on orders over $199.99
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Minerallac #8-18 x 1" Tek Screws with Hex Washer Head, Zinc Plated Steel Construction

Professional Self-Drilling Fasteners for Metal Applications

Minerallac delivers reliable fastening solutions with these #8-18 x 1" Tek screws featuring hex washer head design and zinc plated steel construction. These self-drilling screws provide secure attachment for metal-to-metal applications with corrosion-resistant finish and professional-grade durability for demanding installations.

Professional Features & Benefits

  • #8-18 Thread Size: Optimal threading provides secure grip and reliable holding power in metal substrates
  • 1" Length: Ideal penetration depth for standard thickness materials and secure fastening applications
  • Hex Washer Head Design: Integrated washer distributes load evenly while hex drive enables efficient installation with standard tools
  • Zinc Plated Finish: Corrosion-resistant coating extends service life in indoor and outdoor environments
  • Steel Construction: High-strength material ensures reliable performance under mechanical stress and vibration
  • Type-BSD Threading: Specialized thread design optimized for self-drilling performance in metal applications

Technical Specifications

  • Country Of Origin: Taiwan
  • Head Color: Silver
  • Head Height: 0.103
  • Head Type: Hex Washer Head
  • Head Width: 0.247
  • Product Finish: Zinc Plated
  • Product Length: 1 in
  • Product Material: Steel
  • Product Size: #8
  • Product Type: Tek Screws
  • Thread Size: 18
  • Thread Type: Type-BSD

Installation & Operation

  1. Mark fastening locations and ensure proper alignment of materials to be joined.
  2. Select appropriate drill bit or allow self-drilling point to penetrate base material.
  3. Position screw perpendicular to surface and begin installation with moderate pressure.
  4. Drive screw using hex driver until washer head contacts surface firmly without over-tightening.
  5. Verify secure attachment and proper seating of integrated washer for optimal load distribution.
  6. Inspect completed installation for proper thread engagement and material integrity.

Professional Applications

  • HVAC ductwork and equipment mounting
  • Electrical enclosure and panel installation
  • Metal roofing and siding applications
  • Industrial equipment assembly
  • Commercial building construction
  • Maintenance and repair operations

Why Choose Minerallac Quality?

Minerallac fasteners combine precision manufacturing with reliable materials to deliver consistent performance in professional applications. The zinc plated finish and steel construction ensure long-term durability, while the hex washer head design provides efficient installation and superior load distribution for demanding fastening requirements.

Manufacturer Resources

Product Specs

Head Color:
Silver
Head Height:
0.103
Head Type:
Hex Washer Head
Head Width:
0.247
Product Finish:
Zinc Plated
Product Length:
1 in
Product Material:
Steel
Wire Size:
#8
Product Type:
Self-Drilling Screw
Thread Size:
18
Thread Type:
Type-BSD
Department:
Fasteners
Product Subgroup:
Tapping Screws
Product Group:
Screws

Minerallac 78816J – Frequently Asked Questions

1) Do Minerallac #8-18 x 1" Tek screws need a pilot hole in sheet metal?
No pilot hole. The Minerallac 78816J is a self-drilling screw with Type-BSD threading, so the point drills its own hole as you drive it. Set it perpendicular to the surface and run it in with a hex driver until the washer head seats, without over-torquing.
2) Will a 1 inch Tek screw hold in sheet metal duct or a strut channel?
At 1 inch overall length the 78816J is sized for light to medium gauge steel such as HVAC duct, electrical enclosures, panels and metal siding. The usable thread is the 1 inch length minus the drill point, so it suits thin assemblies. For thick plate or stacked heavy sections, step up to a longer self-drilling screw.
3) What driver size do I need for a #8 hex washer head Tek screw?
Hex washer head with a head width of 0.247 inch and a head height of 0.103 inch, which is the standard 1/4 inch hex drive on a #8 Tek screw. A magnetic 1/4 inch hex bit or nut driver in an impact or screw gun drives it; no bit sits in the head, so there is no cam-out.
4) Are zinc plated Tek screws OK outdoors?
Zinc plating on steel gives corrosion resistance for indoor use and general exterior service. It is not stainless, so for coastal exposure, chemical environments or treated lumber contact, specify a stainless or coated-for-exterior fastener instead.
5) Does the hex washer head need a separate washer?
No separate washer. The washer is formed as part of the head, so it spreads clamp load across the sheet and seats flat on its own. That is why it is used on duct flanges and enclosure covers where a plain pan head would pull through.
6) Will a #8 Tek screw work for mounting electrical boxes and strut hardware to metal studs?
Yes, that is the intended use. These are catalogued for electrical work and the applications include electrical enclosure and panel installation as well as equipment mounting, with the self-drilling point going straight into a steel stud or metal backing with no pre-drill.
7) What does the 18 in #8-18 mean on a Tek screw?
18 is the thread count, 18 threads per inch, paired with a #8 diameter. That coarse-to-medium pitch is what gives the thread bite in metal substrates. Match both numbers when you reorder, since a #8-15 or #8-32 will not behave the same in the same hole.
8) How many screws come in a box of Minerallac 78816J?
The 78816J is packed 100 screws per box, which is the usual quantity for keeping a service van or MRO crib stocked. Order multiple boxes for production work rather than expecting a bulk count in one carton.
How fast can I get the Minerallac 78816J delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Minerallac 78816J come with a warranty?
Absolutely. The Minerallac 78816J is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Minerallac 78816J?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Minerallac 78816J from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!