Manufactured from a high grade alloy steel (Grade 10.9) that has been quenched and tempered, this range of socket head countersunk screws is suitable for all high tensile applications. With a maximum operating temperature of 300C and a minimum proof load of 830 Mpa, the product is ideal for applications that require a flush finished surface. With an oiled, as produced finish, the product is available in an array of lengths with an M4 ISO metric thread size. Features and Benefits Supplied in boxes of 200 to ensure you have an ample amount of fasteners for your application Precise countersunk angle allows maximum flushness and sidewall contact for a firm hold Manufactured from a high grade alloy steel (Grade 10.9) for durability and product longevity Available in a variety of lengths to suit your needs Typical Applications Construction Plumbing DIY Standards DIN 7991 ISO 10642 BS 4168-8 NEN 2359