Welfast Fasteners Pvt. Ltd.

BBD Bag, Kolkata, West Bengal

Welfast Wedge Anchors are fully threaded, stud type, high-grade steel anchors for use in solid concrete or grout-filled concrete masonry. It is assembled with a three-segment expansion clip and supplied complete with nut and washer. Expansion clip ensures uniform holding capacity that increases as tension is applied. The threaded stud version is available in six diameters and multiple lengths. Threaded studs are set by tightening the nut. Wedge anchors are best suited to static applications.

Welfast Fasteners specializes in Pin Type Anchors for push through applications. Pin Type Anchors are impact-expansion type concrete anchors with an interior hole extending the length of the anchor. A hardened drive pin comes along the assembly inserted in the bolt. The anchor is threaded on the upper portion where the drive pin is inserted. Other end of the anchor has four equally spaced slots for a portion of its length, with ribs extending the circumference of the anchor for a portion of its length. Pin Type Anchors are yellow dichromate plated over zinc.

Welfast Fasteners specializes in Pin Type Anchors for push through applications. Pin Type Anchors are impact-expansion type concrete anchors with an interior hole extending the length of the anchor. A hardened drive pin comes along the assembly inserted in the bolt. The anchor is threaded on the upper portion where the drive pin is inserted. Other end of the anchor has four equally spaced slots for a portion of its length, with ribs extending the circumference of the anchor for a portion of its length. Pin Type Anchors are yellow dichromate plated over zinc.

Nylon Anchors are pre-assembled through fixing, a light duty nail expanding for solid masonry and hollow wall constructions. The design of the expansion nail used in the Nylon Anchor is such that it can be removed if need be.

It has a small slot across the head of the nail to accommodate a small screwdriver blade, when turned anti-clockwise by the screwdriver the nail will be wound part way back out of the nylon sleeve. This enables a claw hammer to be hooked under the protruding head of the nail and pulled out of the nylon sleeve. Having withdrawn the expansion nail fully you can now pry out the nylon anchor body.

Welfast Chemical Anchors are high performance anchor system for use in safety critical applications. The assembly works on the principle of adhesion between concrete and chemical (resin) thus eliminating any effects of expansion forces. Chemical anchors are highly suitable in applications requiring close edge and spacing distances. Also these are a preferred choice in wet conditions as well underwater applications.