ST Fastening #12 X 3-3/4" InsulDrill Metal Roofing Screw - Light Gray, Pkg 100
ST Fastening #12 X 3-3/4" InsulDrill Metal Roofing Screw - Light Gray, Pkg 100!
ST Fastening #12 X 3-3/4" InsulDrill Metal Roofing Screw - Light Gray, Pkg 100
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Specifications
ST Fastening #12 x 3-3/4" InsulDrill Metal Roofing Screw - Light Gray, Pkg 100
Built for fastening insulated metal roofing panels, this #12 x 3-3/4" InsulDrill screw delivers dependable holding strength with a clean, color-matched Light Gray finish. Designed for post-frame and residential roofing applications, it installs efficiently while providing long-term weather protection. Each box includes 100 screws for consistent jobsite productivity.
Note: Always confirm proper fastener length based on panel thickness and substrate requirements.
3-3/4" Light Gray Insulated Metal Roofing Screw with Sealing Washer
Engineered for metal-to-wood roofing assemblies, this InsulDrill fastener features a self-drilling point and bonded sealing washer to support watertight performance. The Light Gray head blends with common panel colors for a professional finished appearance.
Key Features
- #1 Self-Drilling Point: Eliminates pre-drilling for faster installation into metal panels and wood framing.
- Color-Matched Head: Light Gray finish complements roofing panels for a uniform look.
- G-90 Bonded Sealing Washer: Helps create a moisture-resistant seal at the fastening point.
- Corrosion-Resistant Coating: Designed to withstand outdoor exposure in roofing environments.
Common Applications
- Post-Frame Metal Roofing: Secures panels to wood purlins.
- Residential Roof Systems: Ideal for insulated metal roofing installations.
- Metal Siding Attachment: Suitable for exterior wall panels.
- Steel-to-Wood Connections: Fastens light-gauge steel panels to wood framing.
- Panel Replacement Projects: Matches existing Light Gray roofing systems.
Installation Tips
- Drive Straight: Keep the screw perpendicular to ensure washer compression is even.
- Do Not Overdrive: Compress the washer snugly without distorting it.
- Use Proper Speed: Moderate drill speed improves drilling efficiency and washer seal.
Related Items
Pair this 1/4" Magnetic Nutsetter with high-quality ST Fastening Screws for fast, secure, and efficient installations. Using the right nutsetter ensures a cleaner finish, reduced slippage, and improved efficiency on the job.








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ST Fastening #12 X 3-3/4" InsulDrill Metal Roofing Screw - Light Gray, Pkg 100
Perfect for a problem roof that dips and installing metal roofing these extra long roofing screws worked perfect, and color perfect.
The Customer Service Rep was great. He had all the information off the top of his head. one of my questions was (With the materials shortage (Screws) would they be able to fill the order? The CS Rep assured me that the company has tons of screws in stock and would easily fill this order. The leed time on the website was 7-10 days. I believe it was exactly the ten days. the screws arrived in a timely manner.
Thank you for the assistance and the screws.
great product, working great for our needs. We will continue to use Fasteners + Plus for specialty screws.