The round head with built-in shield (washer type head) has no sharp edges like conventional lag screws. GRK FASTENERS R4 No 10 x 4 Star Countersk Head Coated Stee Muti-Purpose Screws $29.99 Climatek Coated Lag Screws Grk Fasteners-10221 772691102218 Rss Bulk 5/16-inch By 3-1/8 Washer Head Structural Screws Easy to install lag alternative for structural wood to wood fastening. Fast Bite Tip provides a fast start for one-step installation The sharp threads and points bite instantly into material (including hardwood), reducing the splitting effect due to smaller shanks. GRK RSS Bulk Screws 5/16" x 3-1/8" (10221) – 500-piece pack of structural lag replacement screws for heavy-duty wood-to-wood connections GRK's RSS screw is made of specially hardened steel to provide you with tensile, torque and shear strength.
