{"product_id":"smith-wesson-k-frame-model-10-strain-screw-square-butt-blue-steel-old-style-used-k10172b","title":"Smith \u0026 Wesson K Frame Model 10 Strain Screw Square Butt Blue Steel Old Style Used Part K10172B","description":"\u003cp\u003e\u003cstrong\u003eSmith \u0026amp; Wesson K Frame Model 10 Strain Screw — Square Butt | Blue Steel | Old Style | Used | Part #K10172B\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eFactory OEM strain screw for Smith \u0026amp; Wesson K Frame Model 10 revolvers, square butt configuration, blue steel finish, old style design. The strain screw threads into the bottom of the grip frame and bears against the main spring, allowing adjustment of hammer spring tension. Genuine S\u0026amp;W factory part in used condition.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eThis listing is for the strain screw only.\u003c\/em\u003e Condition: Used, factory original.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: K10172B\u003c\/li\u003e\n\u003cli\u003eFrame: K Frame\u003c\/li\u003e\n\u003cli\u003eModel: Model 10\u003c\/li\u003e\n\u003cli\u003eCaliber: .38 Special\u003c\/li\u003e\n\u003cli\u003eGrip Frame: Square Butt\u003c\/li\u003e\n\u003cli\u003eDesign: Old Style\u003c\/li\u003e\n\u003cli\u003eFinish: Blue Steel\u003c\/li\u003e\n\u003cli\u003eMaterial: Steel\u003c\/li\u003e\n\u003cli\u003eCondition: Used \/ Factory Original OEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eModel Compatibility Chart\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eCaliber\u003c\/th\u003e\n\u003cth\u003eGrip Frame\u003c\/th\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 10\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003eSquare Butt\u003c\/td\u003e\n\u003ctd\u003eBlue Steel\u003c\/td\u003e\n\u003ctd\u003eOld style strain screw; verify butt configuration before ordering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This strain screw is specific to \u003cstrong\u003esquare butt\u003c\/strong\u003e K Frame Model 10 revolvers. Square butt and round butt grip frames use different strain screws — they are \u003cstrong\u003enot interchangeable\u003c\/strong\u003e. Verify your revolver’s grip frame configuration before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe strain screw threads into the bottom of the grip frame and contacts the foot of the main spring (hammer spring). Tightening the screw increases spring tension, resulting in a heavier trigger pull and more reliable primer ignition. Backing the screw out reduces spring tension for a lighter trigger pull, but risks light primer strikes and misfires. Factory specification is fully seated. Only adjust with caution and verify reliable ignition after any change.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation Note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStrain screw replacement requires grip panel removal. Use the correct screwdriver to avoid damaging the screw head. After installation, verify reliable primer ignition with your chosen ammunition before carrying or using the revolver for defensive purposes.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":39624667398202,"sku":"K10172B","price":9.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/products\/DSC01344_b932667f-133a-42c7-95f8-d77b2dd8ba71.jpg?v=1654274940","url":"https:\/\/usagunsandgear.com\/products\/smith-wesson-k-frame-model-10-strain-screw-square-butt-blue-steel-old-style-used-k10172b","provider":"USA Guns And Gear","version":"1.0","type":"link"}