The Pietta 1851 Navy Screw Kit is manufactured by Pietta for their 1851 Navy models. These parts are not guaranteed to fit older Pietta models, other manufacturer's guns, or original firearms. All screws included are blued steel. Refer to the full view schematic picture labeled with reference numbers for screw location. Includes: Features(1) #9 - 403 plunger screw(1) #10 - 377 loading lever screw(2) #12 - 376 wedge & trigger spring screw(1) #19 - 381 hammer screw(2) #23 - 382 trigger & bolt screw(4) #29 - 378 rear backstrap & triggerguard screw(2) #30 - 3405 front triggerguard & bottom grip connect screw(1) #32 - 380 mainspring screw