DeWALT Tap-Flex® Thread-Forming Structural Screws with Stalgard® Plus Coating – 100/Pack

Tap-Flex® Thread-Forming Structural Screws are engineered for high-performance fastening in demanding structural and curtain wall applications. Designed to replace traditional nut and bolt assemblies, these dual heat-treated self-tapping fasteners provide the strength, ductility, and corrosion resistance required for long-term reliability. Featuring the patented E-Form® segmented thread profile, Tap-Flex® screws reduce drive torque, improve installation efficiency, and form threads that ensure greater engagement in steel and aluminum substrates. With Stalgard® Plus coating, these screws deliver enhanced galvanic protection and superior corrosion resistance—tested to withstand up to 1500 hours of salt spray exposure without red rust. Ideal for hollow steel sections, glazing systems, curtain walls, and metal panel assemblies, Tap-Flex® offers an excellent blind fastening solution that resists loosening under vibration or thermal cycling.

Key Features

• Thread-forming self-tapping fasteners eliminate the need for pre-tapping
• Dual heat-treated for Grade 5 bolt mechanical properties with increased ductility
• Patented E-Form® thread profile reduces drive torque and improves thread engagement
• Stalgard® Plus coating provides superior corrosion resistance and galvanic compatibility
• Hex washer head serrations lock securely against fixtures to resist loosening
• Tested for pull-out and shear performance in accordance with AISI S905 standards

Applications

• Hollow steel sections (HSS) and other blind structural connections
• Aluminum-to-steel fastening with galvanic protection
• Curtain walls, cladding, window walls, and glazing systems
• Metal infill panels, angles, brackets, stairs, and risers
• Structural connections subject to vibration or thermal cycling
• General exterior metal construction requiring high corrosion resistance

Available Head Styles

• Hex Washer Head with Serrations (this page)
• Other specialty heads available upon request (refer to DEWALT catalog)

Drill Point Types

• Thread-forming points designed for steel and aluminum (non-drilling)
• Eliminates pre-tapping operations and forms threads during installation
• Patented E-Form® segmented thread profile reduces torque and improves engagement

Screw Sizes & Thread Options

• Available in multiple diameters and lengths to match structural applications
• Thread-forming tapping threads for metal-to-metal fastening
• Dual heat-treated alloy steel provides Grade 5 strength with added ductility
• Stalgard® Plus coating for superior corrosion and galvanic resistance
• Sold in 100-pack quantities

Thread‑Forming Structural Screw – Dual‑heat treated for strength and ductility; replaces nut‑and‑bolt assemblies.

E‑Form® segmented thread profile – Lowers torque and enhances thread engagement.

Serrated hex‑washer head – Locks securely against fixtures.

Stalgard® Plus/GB/SUB coating – Exceptional corrosion resistance; ASTM B117‑tested up to 1,500 hours.

Grade 5 (≈ 120 ksi) – Structural‑grade strength; ductile properties minimize embrittlement risks.

Applications – Ideal for HSS, curtain walls, glazing, panels, and other structural metal applications.

Typical sizes offered:

• 3/8″‑16 × 5″ – Box weight ~23.95 lbs (150 pieces)
• 1/2″‑13 × 3″ – Box weight ~32.00 lbs (150 pieces)
• Additional lengths: 1‑1/2″, 2″, 2‑1/2″; other diameters: 5/8″

Q: What are Tap-Flex® Thread-Forming Structural Screws used for?
A: Tap-Flex® screws are designed for structural metal-to-metal connections, including curtain walls, window walls/glazing, cladding, metal infill panels, angles, brackets, stairs, and hollow steel sections (HSS). They’re ideal where blind installation is needed and where vibration or thermal cycling may loosen conventional fasteners.

Q: Do I need to pre-tap the hole, and can these be installed “blind”?
A: No pre-tapping is required. Tap-Flex® fasteners are thread-forming, dual heat-treated self-tapping screws. The patented E-Form® segmented thread profile reduces drive torque and forms strong, engaged threads during installation—making them an excellent solution for blind connections in HSS and similar applications.

Q: How does the Stalgard® Plus coating help with corrosion and dissimilar metals?
A: Stalgard® Plus provides enhanced corrosion resistance and galvanic compatibility for dissimilar metal joints (e.g., aluminum to steel). Fasteners with Stalgard® Plus typically show no red rust on significant surfaces after 1,500 hours of ASTM B117 salt spray exposure, helping extend service life in exterior and coastal conditions.

Q: What sizes and quantities are available?
A: Tap-Flex® screws are offered in multiple diameters and lengths to match structural needs. This parent item is sold in 100-pack quantities, with additional sizes listed as variants under the same product page.