im confused about your bolt , there is only two types, one for a spring firing pin and the other is non-spring . see below from russian SKS sticky.
you have a non-spring firing pin so the new firing pin should fit.
j. Carrier, Bolt & Firing pin. There are two types of bolt & carrier assembly, parts from each assembly are not interchangeable. Should you replace an assembly with a different type of assembly then you should have a gunsmith check the head spacing.
-Carrier & bolt. Spring type. 1949 - part1951 (below pic, top).
-Carrier & bolt. Non-spring type. part1950 - 1956 (below pic, bottom).
-Type 1 Firing pin. Spring 1949 - part1951 (above right, top).
-Type 2 Firing pin. Non-spring/milled two sides Part1950 - part1953 (above right pic, middle).
-Type 3 Firing pin. Non-spring/milled three sides, part1953 - 1956 (above right pic, bottom).