Smith & Wesson N frame yoke screw, blue $10.00 Part 34 on the exploded diagram. Used, excellent condition blue yoke screw from a Model 57, N frame revolver. Will fit other models of N frame revolvers. Out of stock Category: Smith & Wesson Related products Smith & Wesson K frame .38/.357 Extractor, recessed chambers $25.00 Smith & Wesson K frame mainspring $15.00