8-18 x 1/2 Phillips Modified Truss Self Drill Screw Zinc Plated - FMW Fasteners

8-18 x 1/2 Phillips Modified Truss Self Drill Screw Zinc Plated


Quantity Unit Price
1 to 999 $0.07
1,000+ $0.04
Regular price$0.07 USD

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8-18 x 1/2 Phillips Modified Truss Self Drill Screw Zinc Plated. Our Phillips modified truss head tapping screws offer the choice between spaced or unified threads, as well as a #2 or #3 drill point. Modified truss screws utilize a sharp, self-drilling point designed to drill through steel, in addition to wood and some other materials. The self-drilling capability allows you to eliminate some steps while installing screws, as you won’t need to create a pilot hole beforehand, therefore increasing your overall work speed.

A Phillips recess on the head makes these screws widely accessible, and they also reduce the number of cam outs that you’ll experience with other models. They’re constructed using AISI 1022 or equivalent steel, which allows them to meet multiple ratings (C50-56) on the Rockwell scale. The modified truss screws meet F.I.P.-1000.7 for torsional strength & drill speed, as well as the ASTM A 510 for carbon steel manufacturing. Zinc plating meets ASTM B-117 for salt spray corrosion, as well as its standard use for moisture and rust protection. These parts are manufactured to SAE J78 for dimensional specifications.

Overall, these self-driving, modified truss screws are excellent general purpose units, as you can utilize them in woodworking, HVAC work, sheet metal fastening and more. They can safely join ductwork together, or you could use them to assemble different furniture and cabinetry.

No matter the purpose, FMW Fasteners will help you throughout the process. Choose your preferred quantity, so you won’t be stuck with a large number of screws left over. You’ll receive your modified truss screws with quick, flat-rate shipping. Browse our selection or contact us today with questions.  

Most orders placed with us ship in 1-3 business days. More details here on how you can check on the status of your order.

All of our item images are accurate representative images of the product category, however, due to the limitless variations in thread patterns, finishes, and other variables that exist with fasteners, bits and cutting tools, they are representative images only.



They were swift and delivered fast! They had everything I needed.

Eddie Wilcox
Parma, OH


Exactly what we needed and apparently FMW is not only the single source, but the best source. Easy ordering-fast shipping and great communications.

John B.
Salem, OR

Exactly what I needed and received in a timely manner. Thank you!

Mary Marucci
Philadelphia, PA

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