Fasteners Plus ST Fastening Maxx SteelBinder #12 x 2-1/2 in Screws

In this review the Fasteners Plus ST Fastening Maxx SteelBinder #12 x 2-1/2 in screws are evaluated for contractors and DIYers who install metal roofing and siding. The bottom line: these screws are built for consistent pull-over strength and long-term finish retention, making them a practical choice when you need a reliable fastener for pole barns and pre-engineered metal buildings. The review focuses on performance, corrosion resistance and ease of installation based on the product design and reported user experience.

Key Features

• Hybrid self-drilling point: The combination 2- and 3-point design makes initial penetration easier and reduces point walking when drilling through multilayered steel.
• Maxx self drill head: The 5/16 cupped HWH head seals at angled entries to protect the EPDM washer and maintain a positive seal under load.
• EPDM washer retention: The washer face and head design capture the EPDM even when driven at an angle, maximizing pull-over strength and long-term sealing.
• Powderful corrosion defense: A 2.5 mil powder coating with UV inhibitors resists chalking and fading so the finish remains matched to panels for years.
• #12 carbon steel construction: Intended for attaching metal roof and sidewall panels in pre-engineered metal building applications for robust performance.

Who It's For

This screw set is aimed at builders, metal roof installers and property owners who need a heavy-duty #12 fastener designed specifically for metal panels on pole barns and similar structures. It suits projects where a reliable weather seal and long-lasting finish are priorities.

Those who frequently drive screws through very thin gauge metal or require perfect drilling every time should be aware some users reported a small percentage of drill accuracy issues; for precision work on ultra-thin or specialty materials, testing a small batch first or using a dedicated self-drill tip matched to material thickness is advisable.

Pros & Cons

Pros

• Strong pull-over strength and positive sealing thanks to the cupped HWH head and EPDM washer design.
• Durable finish with UV inhibitors preserves color and reduces chalking over time.
• Hybrid self-drilling point provides easier starts and better penetration through multilayered steel panels.

Cons

• Some customers reported mixed drill accuracy, with roughly 10% not drilling properly in their experience, so occasional failures may occur.

Specifications

Brand	ST Fastening
Quantity	250 count
Size	#12 x 2-1/2 in
Head	5/16 in cupped hex washer head (HWH)
Point	Hybrid self-drilling 2- and 3-point design
Coating	2.5 mil powderful finish with UV inhibitors
Washer	EPDM rubber washer retained at the head

Our Verdict

These SteelBinder screws are a solid, value-oriented choice for metal roof and sidewall installation when long-term finish retention and sealing are important. Installers who expect occasional drill misses should pretest on sample panels, but for most pole barn and pre-engineered building work the combination of the hybrid point, cupped head and EPDM washer delivers dependable performance and corrosion-resistant value.

Frequently Asked Questions

Will these screws seal at angled installs?
Yes, the cupped hex washer head and EPDM washer are designed to capture the washer even when driven at an angle and maintain a positive seal.

Are they suitable for thick structural steel?
They are designed to self-drill into common metal roof and sidewall panel thicknesses; penetration capacity is for typical pre-engineered building panel gauges rather than very thick structural plate.

How well does the finish hold up outdoors?
The 2.5 mil powderful coating with UV inhibitors resists fading and chalking so the finish remains matched to panels for years under normal exposure.