40S41-21SW

The part you originally want 40S41-21SW is made of high strength stainless steel which has a tension force of 4700N and 3100N working load and comes with a large springcup. We suggest to switch an alternative also made in stainless steel however with a tension load of 3300N and working load of  2200N and a small spring cup which is part HGRTLW-21S which requires the use of a retaining washer MHSWSS. If you need absolutely the high force, then switch to the steel zinc plated part which has also 4700N tension force which is part HGRTLW-21Z with small spring cup or we can also suggest the part HGRTLW-21HSS, which is also made in high strength stainless steel but with large spring cup.