Spax Washer Head Power Lags (Yellow Zinc) - 5/16" x 4" - Low profile washer head has a cleaner appearance for interior applications and the large bearing surface under the head is superior for wood to wood or metal to wood fastening. The screw is protected with a zinc plating and has a yellow chromate finish. Available in contractor boxes or bulk pails. Features include.........

• Contractor box (50pc)
• Partial thread
• Hardened steel (grade 5)
• See spec chart for shear strength
• Does not require pre-drilling
• Torx drive (1/4"=T30, 5/16"=T40, 3/8"=T50)
• Made in USA