Bulk Flat Head Sleeve Anchors – Phillips/Slotted Combo – Zinc CR+3 – 1/4", 5/16", 3/8" – Monster Bolts Length:300 Qty - 3/8" x 4" Reliable Inventory: Ensures project timelines

Reliable Inventory: Ensures project timelines stay on track with readily available stock

18-8 Stainless Steel: Long-term rust resistance—no coating required

Coarse Thread Efficiency: UNC threading ensures a secure grip in heavy-duty applications

Perfect for demanding applications

Bulk Flat Head Sleeve Anchors – Phillips/Slotted Combo – Zinc CR+3 – 1/4", 5/16", 3/8" – Monster Bolts Length:300 Qty - 3/8" x 4" Reliable Inventory: Ensures project timelinesMonster Overview: Upgrade your projects with Flat Head Sleeve Anchors from Monster Bolts. Built with a Phillips Slotted combo drive, these anchors are quick to install using standard tools and deliver a flush surface finish for clean, professional results. Crafted from steel with a Zinc CR+3 coating, these anchors resist corrosion in indoor and light outdoor environments. Ideal for attaching fixtures to concrete, block, or masonry. Monster Features: