NB179F Smith & Wesson N Frame Model 27 Thumb Piece & Nut .357 Magnum j637u This center pin is designed

This center pin is designed specifically for J Frame models with 3" barrels

This cross-compatibility is due to similar cylinder pin designs across these specific models

Genuine Factory OEM Part: Manufactured by Smith & Wesson to exact factory specifications—not an aftermarket substitute

This listing is for the extractor rod only

When you push the rod

NB179F Smith & Wesson N Frame Model 27 Thumb Piece & Nut .357 Magnum j637u This center pin is designedNB179F Smith & Wesson N Frame Model 27 Thumb Piece & Nut . 357 Magnum How to determine the model number of your Smith & Wesson Revolver. Swing out the cylinder , check behind the yoke on the frame for a MODEL NUMBER. Model numbers began in 1957 58. So if there is no model number then your revolver may be older than 1957 58. In this case we can possibly still find the part you need with the serial # . If this is the case contact us and we will need a