ALSO KNOW AS GRUB SCREWS.
SOCKET SETS SCREWS COME WITH DIFFERENT POINTS.
CUP POINT DIN 916 ISO 4029 BS 4168-5
KNURLED POINT DIN 916 ISO 4029 BS 4168-5
FLAT POINT DIN 913 ISO 4026 BS 4168-2
CONE POINT DIN 914 ISO 4027 BS 4168-3
DOG POINT DIN 915 ISO 4028 BS 4168-4
GRADE 14.9 OR 45H STEEL BLACK PHOSPHORUS.
GRADE 14.9 OR 45H STEEL ZINC PLATED.
GRADE A2 = 304 STAINLESS STEEL.
GRADE A4 = 316 STAINLESS STEEL.
UNC BLACK PHOSPHORUS, ZINC PLATED, STAINLESS STEEL.
UNF BLACK PHOSPHORUS, ZINC PLATED, STAINLESS STEEL.
BA BLACK PHOSPHORUS, ZINC PLATED.
BSF NON-PERFERRED CHECK AVAILABILITY.
WHITWORTH NON-PERFERRED CHECK AVAILABILITY.