1/4" Type B Metal Self-Tapping Screw, HH, 304 Stainless | TB-S3-14

• Zinc plated 304 stainless steel for corrosion resistance
• Available with no sealing washer or with bond seal washer
• Wax surface treatment for added lubricity
• Long lengths available for specialty applications

Metal panel to medium and heavy gauge metal application for use in high corrosive environments or with dissimilar metals where corrosion resistance and long building life are critical factors

FM Approved

• Install fasteners with0–1000 rpm screw gun equipped with depth sensing nose piece.
• Use of impact guns or hammer drill is not recommended.
• Metal thickness/drill bit size:
• 0.065"–0.085" (1.65 mm–2.16 mm);  drill bit size #8 (5.05 mm)
• 0.085"–0.115" (2.16 mm–2.92 mm);  drill bit size #7 (5.11 mm)
• 0.115"–0.375" (2.92 mm–9.53 mm);  drill bit size #1 (5.79 mm)
• 0.375"–0.500" (9.53 mm–12.7 mm); drill bit size #1 or larger depending on hardness of steel
• The hole size determines installation performance and pull out strength. Thickness is based on normal, single thickness purlin/girt or multiple material thickness combined for total.
• Fastener length should provide for a minimum of 3/16" penetration of fully developed threads into metal substrate.