Minerallac #12 Self-Tapping Sh...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$15.71
Minerallac #12 Self-Tapping Sheet Metal Screws, Hex Washer Head, Slotted, Zinc Plated, 100-Pack

Minerallac #12 Self-Tapping Sheet Metal Screws, Hex Washer Head, Slotted, Zinc Plated, 100-Pack

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Model: 77212J

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

$15.71
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Minerallac Self-Tapping Sheet Metal Screws 12 x 3/4" Hex Washer Head Slotted Zinc Plated

Professional Grade Fastening Solutions for Sheet Metal Applications

Minerallac delivers reliable fastening performance with these professional-grade self-tapping sheet metal screws featuring 12 x 3/4" dimensions, hex washer head design, and zinc plated finish. Engineered for sheet metal applications, these Type-A thread screws provide secure attachment with slotted drive configuration and durable steel construction for consistent installation results.

Professional Features & Benefits

  • 12 x 3/4" Size: Optimal dimensions for standard sheet metal thickness applications with reliable penetration depth
  • Hex Washer Head Design: Provides increased bearing surface and torque distribution for secure fastening without material damage
  • Zinc Plated Finish: Corrosion-resistant coating extends service life in various environmental conditions
  • Self-Tapping Type-A Thread: Sharp thread design cuts its own path for efficient installation in sheet metal materials
  • Slotted Drive Configuration: Compatible with standard slotted screwdrivers for versatile installation options
  • Steel Construction: Durable material provides strength and reliability for demanding fastening applications

Technical Specifications

  • Country Of Origin: China
  • Drive Type: Slotted
  • Driver Size: 16-May
  • Head Color: Silver
  • Head Height: 0.34
  • Head Type: Hex Washer Head
  • Head Width: 0.312
  • Product Finish: Zinc Plated
  • Product Length: 3/4 in
  • Product Material: Steel
  • Product Size: 12 x 3/4
  • Product Type: Sheet Metal Screw
  • Thread Size: 11
  • Thread Type: Type-A

Installation & Operation

  1. Mark the installation points on the sheet metal surface ensuring proper spacing and alignment for the application.
  2. Select appropriate slotted screwdriver that fits securely in the screw head slot without excessive play.
  3. Position the screw perpendicular to the sheet metal surface at the marked installation point.
  4. Apply steady downward pressure while turning clockwise to engage the self-tapping threads with the material.
  5. Continue turning until the hex washer head is seated firmly against the sheet metal surface without over-tightening.
  6. Verify secure attachment and proper seating of all installed screws before completing the assembly.

Professional Applications

  • HVAC ductwork assembly and repair installations
  • Electrical enclosure and panel mounting applications
  • Metal roofing and siding attachment projects
  • Industrial equipment housing and bracket installations
  • Commercial building maintenance and repair work
  • Automotive and transportation industry sheet metal work

Why Choose Minerallac Quality?

Minerallac fastening solutions deliver consistent performance with precision-manufactured steel construction and protective zinc plated finish. The hex washer head design and Type-A threading provide reliable installation results for professional sheet metal applications, ensuring long-term durability and secure attachment in demanding service environments.

Manufacturer Resources

Product Specs

Head Width:
0.312
Thread Size:
11
Driver Size:
16-May
Product Subgroup:
Self-Tapping Screws
Thread Type:
Type-A
Product Type:
Sheet Metal Screw
Head Height:
0.34
Head Type:
Hex Washer Head
Drive Type:
Slotted
Department:
Electrical
Head Color:
Silver
Product Finish:
Zinc Plated
Product Material:
Steel
Product Group:
Hangers, Supports & Fasteners

Minerallac 77212J – Frequently Asked Questions

1) Do I need to pre-drill a pilot hole for these sheet metal screws?
No pilot hole is needed in sheet metal. These are Type-A self-tapping screws, which have a sharp gimlet point and coarse spaced thread that cuts its own path through thin gauge steel. Set the screw perpendicular to the surface, apply steady pressure and drive clockwise until the washer head seats. Type-A is intended for thin sheet, not for thick plate or structural steel.
2) Will a #12 hex washer head screw hold in HVAC duct and electrical enclosures without tearing the metal?
That is the point of the washer head. The flange spreads clamp load over a wider bearing surface than a plain hex head, so torque is distributed and the thin sheet is far less likely to dimple or tear out at the hole. Common uses are duct assembly and repair, enclosure and panel mounting, metal roofing and siding, and equipment housings and brackets. Stop turning as soon as the head is firmly seated, since over-driving is what strips the thread in light gauge.
3) Are zinc plated screws OK outdoors or in a damp mechanical room?
Zinc plated steel handles indoor and sheltered damp conditions, mechanical rooms, plenums and interior duct runs, and gives corrosion resistance that extends service life. It is not a stainless screw. For continuous wet exposure, salt air, coastal roofing or treated lumber contact, choose a stainless or hot dip galvanized fastener instead.
4) Is a #12 self-tapping screw the right choice for hanging strut or mounting a panel to structural steel?
No. Type-A self-tapping screws are for thin sheet metal, duct, and light enclosure work. For anchoring strut or a panel to thick structural steel you need a self-drilling screw rated for that thickness, a through bolt, or a beam clamp. Use these #12 screws where the substrate is light gauge steel the thread can cut and form into.
5) Is the head painted or bare metal? I need it to blend with galvanized duct.
Bare plated metal, silver in color, from the zinc plating over steel. Nothing is painted or coated in a color, so the heads read the same bright silver as galvanized duct and unfinished enclosure steel.
How fast can I get the Minerallac 77212J 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 77212J come with a warranty?
Absolutely. The Minerallac 77212J 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 77212J?
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 77212J from ZenSupply?
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