Dril-Flex screws are engineered and processed to help prevent hydrogen-induced brittle failures. Each fastener undergoes the unique Flex Technology Õ Â dual-hardening process, ensuring the optimal combination of ductility and hardness required for maximum performance in the field. Stalgard Õ Â coating provides additional corrosion resistance. Testing of this product, in accordance with ASTM standards, has proven that Dril-Flex screws provide the same resistance to hydrogen-assisted cracking (HAC) as a Grade 5 screw. Virtually immune to delayed embrittlement failures
Precision-engineered and dual heat treated drill screws provide the strength, ductility and resistance to embrittlement required for critical applications. Elco Dril-Flex self-drilling screws meet the same construction specifications Hilti Kwik-Flex
|ÕÌ_Description||1/4-20 x 4" Undercut Flat|
|Load Bearing Area||3.50 in|
|Finish||Silver Stalgard Õ Â Coating|
|Head Size||1/4 in Diameter, #3 Phillips Undercut Flat Head|
|Screw Type||Dril-Flex Õ Â Structural Drill Screws|
|Head & Drive Styles||Phillips Undercut Flat|
|USA/Import||Made in USA|
Approvals and Listings
COLA approved and ICC listed
Features and Benefits
- High-hardness points and lead threads for drilling and tapping
- Lower-hardness in load-bearing threads for ductility
- Virtually immune to delayed embrittlement failures
- Stalgard Õ Â coating provides 1000 hours of salt spray resistance (per ASTM B117)
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.