General description This M8 x 20 Hammer Head Screw set includes 10 pieces of A2 stainless steel T-Rail bolts with flange nuts, designed specifically for photovoltaic module mounting and greenhouse applications. These screws are engineered for durability and reliability, ensuring a long service life. Technical specifications Material: A2-70 stainless steel Size: M8 x 20 Quantity: 10 screws and 10 flange nuts Usage Ideal for metal construction Suitable for aluminum profile assembly Perfect for solar module fixing Can be used with roof hooks for photovoltaic systems Other information Features high hardness and superior rust resistance Precision design with clean threads for easy screwing Locking teeth on nuts provide excellent holding power