{"product_id":"smith-wesson-model-19-4-round-butt-strain-screw-19172","title":"Smith \u0026 Wesson Model 19-4 Round Butt Strain Screw - 19172","description":"\u003ch2\u003eSmith \u0026amp; Wesson Model 19-4 Round Butt Strain Screw - 19172\u003c\/h2\u003e\u003cp\u003eUsed strain screw listed for a Smith \u0026amp; Wesson Model 19-4 K-frame revolver with a round-butt grip frame. This screw bears on the mainspring; correct fit and adjustment matter for reliable ignition. Inspect the actual part and compare it with the screw being replaced before ordering.\u003c\/p\u003e\u003ch3\u003ePart details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart:\u003c\/strong\u003e Old-style round-butt strain screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListing part number \/ SKU:\u003c\/strong\u003e 19172\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListed application:\u003c\/strong\u003e Smith \u0026amp; Wesson Model 19-4, K frame, .357 Magnum, round butt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used; check photos for actual wear and finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Strain screw only\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eModel compatibility\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eFrame \/ caliber\u003c\/th\u003e\n\u003cth\u003eFitment check\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eModel 19-4\u003c\/td\u003e\n\u003ctd\u003eK frame \/ .357 Magnum\u003c\/td\u003e\n\u003ctd\u003eRound-butt grip frame and matching old-style strain screw; compare length, threads, and tip with the original.\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eOther models and dash revisions:\u003c\/strong\u003e Fitment has not been verified for this individual screw. Do not assume interchangeability based on frame size or caliber alone. Square-butt and later-design applications require separate verification.\u003c\/p\u003e\u003ch3\u003eBefore installation\u003c\/h3\u003e\u003cp\u003eConfirm your revolver's model and dash marking, butt shape, and the original screw's dimensions. A gunsmith should check fit and mainspring tension; an incorrectly fitted or shortened screw can affect ignition.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":31984161390650,"sku":"19172","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC00433.jpg?v=1779983835","url":"https:\/\/usagunsandgear.com\/products\/smith-wesson-model-19-4-round-butt-strain-screw-19172","provider":"USA Guns And Gear","version":"1.0","type":"link"}