SWG Screws & Bolts Allen screws 630736 - SWG 9484067, SWG 9484067 Allen screws are M8 x 40 mm, hex socket, stainless steel A2 cylinder head screws. Manufactured according to DIN 912 standards, they are durable and corrosion-resistant. These metric machine screws are typically used in construction and machinery assembly. SWG 9484067 Allen Screws M8x40mm Hex DIN912 A2 Stainless 40pieces