Active Member
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[China]
Address: Rongda Industrial Park, Xinhua Road, Wangting Town, Suzhou City, China
Contact name:
Suzhou Crever Fastener Co., Ltd |
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Heavy Duty Screws For Concrete And Block Blue Ruspert Coating Corrosion Resistance
1. Descriptions:
Concrete screws are designed to screw into hardened concrete. A pilot hole created with a concrete drill bit is required. Head styles are flat and hex washer. Hex washer heads provide for greater torque and usually have a slotted, Phillips or star type combination heads. High low threads provide greater holding power and require less torque to install. Typical blue finish provides good corrosion resistance. Stainless steel is also available.
Concrete screws are available with either flat head Phillips or hex heads. In situations where the screwhead must be flush to the surface (furring strips under drywall), or where a Phillips head would look nicer, use the Phillips head screws. Otherwise, always pick the hex head screws. The positive engagement of the hex bit makes them easier to drive (see photo, p. 35).You'll need a 1/4-in. hex driver for the 3/16-in. screws and a 5/16-in. hex head driver for the thicker 1/4-in. screws.
When you're using Phillips head screws, keep extra No. 2 (No. 3 for 1/4-in. screws) Phillips head bits on hand. The hardened screws wear out bits quickly.
2. Specifications:
Product Name | flat head philips concrete screws |
Material | stainless steel, carbon steel, alloy steel, brass and so on |
Color | zinc, black phosphate, gray, decramet, HDG, ruspert, nickel and so
on |
Standard | DIN GB ISO JIS BA ANSI |
Grade | C10B21, C1022, SUS201, SUS304, SUS316, A2-70, A2-80, A4-80, 4.8 6.8
8.8 10.9 12.9 |
Sizes | 3/16''--1/4'' |
Thread | full thread, partical thread |
Drive | philips, pozi, socket, hex, square, solloted, combined |
3. Applications:
Good technique is essential for driving concrete screws. Not enough downward pressure and the bit could slip off the head, especially if you're using Phillips head screws. For the best results, keep constant pressure on the screw and run the drill at slow to medium speed.
It takes a light touch to avoid snapping screws. Heavy-duty drills work best because they can maintain a steady slow speed. Stop as soon as the screw is flush to the surface and your material is firmly attached. Driving at high speeds results in overdriving the screw and can strip the threads or break off the head. You'll develop a feel for the right amount of speed after driving a few screws
4. Advantages:
5. More pictures:
FLAT COUNTERSUNK HEAD PHILIPS DRIVE CONCRETE SCREWS, RUSPERT COATING
