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Machine Screws, Flat Undercut 6-Lobe Drive, Standard 82 Degree Countersink, Full Thread, Steel, Zinc Plated SAE J82

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U-Drive Screws (Hammer Drive Screws)


U-drive screws (Hammer Drive Screws) are unslotted round head thread forming screws having multiple start threads with a large helical angle and an unthreaded pilot point. The fastener is case-hardened and must be harder than the mating part and is to be driven or hammered into a substrate (eg. plastics, sheet metals, or castings) for a quick permanent assembly. Requires an undersized pre-drilled or punched hole for maximum adhesion.

Available in zinc or black oxide coated steel and also in stainless steel in sizes ranging from #00 - #8 and lengths between 1/8" and ┬ż".

For technical/dimensional specifications of u-drive screws as well as recommended pilot hole sizes click here.

If you should happen to be looking for u-drive screws (hammer drive screws) or other fasteners that are currently not listed as stock items on Aspen Fasteners, or in the event that we are out of stock, we will do our best to find the parts for you. All of the u-drive screws (hammer drive screws) listed in zinc or black oxide are standard stock items, and available for immediate same day free shipping.

All items are available in bulk quantities, but if smaller quantities are preferred, we would like to hear from you as we are often able to offer the same parts in smaller package quantities. If you require a quote for a specific fastener or u-drive screw (hammer drive screw) listed or not, please call us at 1-800-479-0056 or email us at aspensales@aspenfasteners.com and one of our knowledgeable sales staff will help you with your needs.

The price of any fastener or u-drive screw (hammer drive screw) listed on the site includes shipping to your destination. If you have any special shipping requirements (eg expedited/next day delivery), please let us know at the time of order placement and we will make the necessary arrangements. Discounts are available for larger quantity orders. Major credit cards are accepted.