1/4 Inch By 3-1/4 Inch Slotted Hex Washer Head Concrete Screw With Tapcon Style Threads, Includes Drill Bit, 100 Per Box, Cuts Threads In Structural Concrete Hollow Block Brick Mortar CMU, Blue R Blocker Corrosion Resistant Finish

1/4 x 3-1/4 in Slotted Hex Concrete Screw, 100 pcs
✔️ Includes drill bit, blue R-Blocker coating, 100 per box

These high-strength concrete screws bite into concrete, hollow blocks, brick, mortar, and CMU for fast, secure anchoring. They’re ideal for mounting window frames, cladding, shelves, and brackets where a removable fastener is helpful.

✅ 1/4 in (6.35 mm) dia x 3-1/4 in (82.6 mm) length, slotted hex washer head, gimlet point
✅ Tapcon-style twin-lead threads with V-notches for fast driving and strong pullout
✅ Blue R-Blocker corrosion-resistant finish delivers 1000+ hours salt spray resistance (ASTM B117)
✅ Drill bit included; 100 pieces per box; suitable for predrilled holes
✅ Works in concrete, hollow block, brick, mortar, and CMU; removable and reusable
✅ Applications: cladding, brick ties, window frames, upright shelves, conduits

💡 What is a concrete screw used for? This handy fastener is designed for quick, secure mounting into masonry. - Handy for attaching fixtures to concrete, brick, and CMU - Twin-lead threads and V-notches speed installation and resist pullout - Blue R-Blocker finish resists salt spray for outdoor use