This is a screw that replaces the hammer screw on a Rossi or Puma Model 92 "M92" with a saddle ring stud. This only fits the Rossi's and Puma's and does not fit the original Winchester Model 92. This is a metric part.
Available in all stainless, all blued carbon steel and a stainless stud with blued ring. Also available as blued with a brass ring. Stainless and carbon steel rings are tack-welded. Brass rings are not welded or brazed. The stainless stud on the blued ring has some bluing residue that gives a little bit of an "aged" look.