METRIC DIN N/A ISO 7379 BS 4168-7
SOCKET SHOULDER SCREWS ARE MEASURED FROM UNDER THE HEAD.
WHAT EVER THE DIA OF THE BODY THE THREAD IS ALWAYS THE NEXT SIZE DOWN. IE (IF BODY IS 10mm DIA THE THREAD IS M8).
GRADE 12.9 HIGH TENSILE STEEL.
GRADE A2 = 304 STAINLESS STEEL.
UNC NON-PERFERRED CHECK AVAILABILITY.
UNF NON-PERFERRED CHECK AVAILABILITY.
BSF NON-PERFERRED CHECK AVAILABILITY.
WHITWORTH NON-PERFERRED CHECK AVAILABILITY.