Malco BT134-500 Hex Washer Bit-tip Screw 18 Tpi 500pk

Product Description

The MALCO BT134-500 is a hex washer head bit-tip screw designed for fast, clean fastening in sheet metal and light structural applications. Sized at number 8 diameter by 1 inch in length with 18 threads per inch (TPI), each screw features a number 2 drill point that creates an optimum pilot hole for tight thread engagement without pre-drilling. The 1/4-inch hex drive makes these compatible with standard power drivers and impact tools. Screws are cold forged for consistent dimensional uniformity and heat treated for added hardness and durability. This bulk pack contains 500 screws.

These bit-tip screws are well suited for HVAC duct fabrication, sheet metal assembly, and light construction fastening where speed and holding strength matter. The self-drilling bit-tip point eliminates the need for separate drill bits or auxiliary fastening equipment, reducing steps and labor time on the job. Licensed sheet metal workers and HVAC technicians are the primary installers of this fastener type, though general tradespeople working with light gauge steel will find them equally practical.

Key Features

• Number 2 drill point sized for optimum hole diameter and thread engagement
• Cold forged construction ensures uniform dimensions and consistent drill point contour
• Heat treated steel for improved hardness and tapping performance
• 1/4-inch hex drive compatible with standard power drivers and hex-tip impact drivers
• Hex washer head distributes clamping load and resists pull-through
• Eliminates need for separate drill bits or welding equipment in sheet metal work
• Bulk pack of 500 for high-volume production or service use

Compatibility

Designed as an OEM-style replacement and general-use bit-tip screw for sheet metal and light steel fastening applications requiring a number 8 diameter, 1-inch, 18 TPI hex washer head fastener with a 1/4-inch hex drive.

Installation Notes

Sheet metal workers and HVAC technicians typically install these screws using a 1/4-inch hex chuck power driver or impact driver set to an appropriate clutch setting to avoid stripping the hex washer head. Power down all equipment and secure workpieces before fastening. Do not over-torque, as this can strip threads in light gauge material or damage the washer face. Follow applicable sheet metal and ductwork installation codes, including SMACNA standards where required.

Technical Specifications

• Nominal Diameter: 8
• Length: 1 inch
• Threads Per Inch (TPI): 18
• Drive Style: 1/4-inch Hex
• Head Style: Hex Washer
• Drill Point Size: 2
• Material: Steel
• Process: Heat Treated
• Quantity: 500 per bulk pack
• Warranty: Lifetime Limited

Standard Information

• Brand: MALCO
• Manufacturer Part Number: BT134-500