JIS Round Oval Countersunk Head Stainless Steel

JIS Round Oval Countersunk Head Stainless Steel
Measure from end of thread to the top of countersunk do not including the oval 

SUS304 (A2)
With Mo (molybdenum) added, which has good corrosion resistance.
In addition, corrosion resistance is improved by increasing the amount of Ni (8% for 304).
SUSXM7 (A2)
Stainless steel that is easier to process than SUS304.
　Cr18% + Ni9% + Cu3%
Cu (copper), a soft metal, is added to SUS304, which does not have good cold workability, to suppress work hardening and make it easier to cold work.
Corrosion resistance and strength are equivalent to SUS304.

SUS316 (A4)
Stainless steel has particularly good corrosion resistance among austenitic stainless steels.
　Cr18% + Ni12% + Mo2%

Screw 3mm Pitch 0.50mm Max Head OD 6mm+0/-0.5 Head Depth  1.75mm +0/-0.3

Screw 4mm Pitch 0.70mm Max Head OD 8mm+0/-0.5 Head Depth  2.30mm +0/-0.3

Screw 5mm Pitch 0.80mm Max Head OD 10mm+0/-0.6 Head Depth  2.80mm +0/-0.3

Screw 6mm Pitch 1.00mm Max Head OD 12mm+0/-0.7 Head Depth  3.40mm +0/-0.4