The Nail Screw (featuring the specialized “Umbrella Thread” or “Sawtooth Thread”) is a hybrid fastener that combines the speed of a nail with the holding power of a screw. Designed primarily as the metal core for Nylon Hammer-in Anchors, this Nail Screw allows for rapid “Hammer-Set” installation, significantly reducing labor time on large-scale framing and battening projects.
Product Overview: Manufactured from ductile C1008 Carbon Steel to withstand impact force, our Nail Screws are finished with Zinc Plating for corrosion protection. The unique “Umbrella” thread profile features a steep leading edge that slides past the nylon plug material during hammering, but a flat trailing edge that locks securely against pull-out forces.
Nail Screw (Umbrella Thread) Specifications
| Product Name | Nail Screw / Hammer Drive Screw / Umbrella Thread Screw |
| Material Grade | C1008 Carbon Steel (Impact Resistant) |
| Surface Finish | Zinc Plated (Blue/White) |
| Thread Type | Umbrella / Sawtooth (Asymmetric Profile) |
| Head Style | Countersunk (CSK) with Phillips/Pozi Recess |
Engineering Insight: Hammer In, Screw Out
The genius of the Nail Screw lies in its dual nature:
- Installation (The “Nail” Mode): You do not need a screwdriver to install it. Simply insert the anchor assembly into the hole and strike the head with a hammer. The slanted threads slide effortlessly, expanding the plug instantly.
- Removal (The “Screw” Mode): Unlike a standard nail, a Nail Screw can be removed. The Phillips recess allows you to back it out with a screwdriver like a traditional screw, making it ideal for temporary fixtures or adjustments.
For more details on drive screws, please refer to the Drive screw entry on Wikipedia.
Installation Guide
- Drill: Drill a hole through the fixture and into the substrate (concrete/brick) to the required depth.
- Insert: Push the Nylon Plug (sold separately or as a set) through the fixture.
- Hammer: Strike the Nail Screw head firmly with a hammer until it is flush with the surface.
- Adjust (Optional): If fine-tuning is needed, use a Phillips screwdriver to tighten or loosen the screw.
Frequently Asked Questions (FAQ)
Q: Can I use this directly in wood?
A: While it’s possible, it is not designed for wood-to-wood connections. It is specifically engineered to expand plastic plugs in masonry.
Q: Why use C1008 Steel?
A: C1008 is a low-carbon steel that offers high ductility. This is crucial because hard, brittle steel might snap the head off when struck by a hammer. C1008 absorbs the impact energy.
Need Hammer Drive Screws?
Handan Bolt manufactures Nail Screws in high volume for nylon anchor assembly lines. We offer sizes from M5 to M10 with custom plating options.
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