Sea Screw Ltd
Information on 
Hex Head Set Screws. 
 
In A2 304 & A4 316 Stainless Steel.
 Made to DIN 933 Standard.
Hex Head Sea Screw
  
1st size given is the M diameter i.e. M10 = Metric 10mm  
2nd size given is the L length from under the head. 
 Spanner Size & Pitch See chart below.

(Metric) 
Bolt Diameter

 Standard 
Thread Pitch		 Spanner 
Size
M3 = 3mm 0.50 5.5
M4 = 4mm 0.70 7
M5 = 5mm 0.80 8
M6 = 6mm 1.00 10
M8 = 8mm 1.25 13
M10 = 10mm 1.50 17
M12 = 12mm 1.75 19
M14 = 14mm 2.00 22
M16 = 16mm 2.00 24
M18 = 18mm 2.50 27
M20 = 20mm 2.50 30