Triangle Fastener Receives FM Approval for 1/4-Inch Diameter Blazer-3 Drill Screws

Triangle Fastener Corporation (TFC) announced that the company has received FM approval for its ¼-14 BLAZER-3 Drill Screws in carbon steel. The FM approval is for screw attachments per classes 4471 (Panel Roofs) and 4881 (Exterior Wall Systems). These screws are provided with TRI-SEAL long-life finish and are approved in lengths up to 11 inches.  

The listing can be found at, or visit the FM RoofNav or Approval Guide website.

Blazer Drill Screws are often specified by many metal roof and wall panel manufactures including producers of insulated metal panels (IMP).

TFC, a Member of SFS, has 23 locations throughout the USA. They provide a complete line of standard and specialty fasteners, sealants, tools and accessories. Markets served include; commercial roofing and siding, metal building, post frame, commercial interior, and miscellaneous cladding. They also provide engineering assistance, testing, and can custom design products for specific applications.

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Fasteners Designed to Attach Sheeting over Rigid Insulation

Triangle Fastener Corporation expands their line of BLAZER Drill Screws with new sizes designed to attach metal panels over rigid insulation. These unique screws have two different threads with a gap in between that eliminates jacking of the panel during installation.

Features and benefits:

  • A special ¼-14 “high thread” under the screw’s head secures the metal panel tightly against the head for optimal seal
  • Unique unthreaded section eliminates the “jacking” of the panel during installation, improving the drilling and tapping performance
  • BLAZER 3 drill point for fast penetration with less effort
  • Lengths: 1-7/8-inch, 2-3/8-inch, 3-1/4-inch and 4-inch
  • TRI-SEAL 1,000-hours salt spray coating provides over 20-times more corrosion protection than screws with commercial zinc plated
  • Available with a zinc alloy cap or stainless steel cap providing corrosion resistance in harsh environments

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Zinc Head Screws Resist Corrosion

Triangle Fastener Corp.</a> has launched a complete line of corrosion-resistant zinc head screws.

Triangle Fastener Corp. has launched a complete line of corrosion-resistant zinc head screws.

Triangle Fastener Corp. has launched a complete line of corrosion-resistant zinc head screws. Available on the high-performance BLAZER Drill Screws, these fasteners are preferred for use in many warranted roof systems. The ZAMAC-5 Zinc Alloy Head provides superior strength and will not red rust. The carbon steel shank is TRI-SEAL 1,000-hours salt-spray- coated, which increases the corrosion resistance by more than 20 times compared to zinc-plated screws. An EPDM washer seals and weathers. Sizes include #12 and 1/4-inch diameters in BLAZER-3 and BLAZER-5 drill points in lengths up to 4 inches.