{"product_id":"t-sm4rr-sm4-retaining-ring-for-o4-mounts","title":"T-SM4RR - SM4 Retaining Ring for Ø4\" Mounts","description":"\u003cp\u003eT-SM4RR - SM4 Retaining Ring for Ø4\" Mounts\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1026\/4509\/files\/18512-E0W.pdf?v=1689714166\"\u003e\u003cstrong\u003eProduct Drawing\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cul class=\"SGBulletNI\"\u003e\n\u003cli\u003eStandard Retaining Rings for Optics Ranging from Ø75 mm to Ø4\"\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThread SM4 (4.035\"-40)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThickness 0.13\" (3.3 mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClear Aperture Ø3.81\" (Ø96.8 mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eOur Standard Retaining Rings are manufactured from anodized aluminum and are offered in sizes to match our optic mounts and lens tubes, are designed to maximize the clear aperture while providing sufficient holding force. Securing an optic using a retaining ring is a stable method for holding the optic since the optic is retained along its entire edge instead of just at a few points. Each retaining ring is machined with two slots for compatibility with our selection of spanner wrenches.\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable class=\"RedSpecTable\" cellspacing=\"0\" align=\"center\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"leftBorder\" colspan=\"4\" align=\"center\"\u003eT-SM4 (4.035\"-40.0) Threading\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"subhead\"\u003e\n\u003ctd class=\"leftBorder\" colspan=\"2\" align=\"center\"\u003eInternal Thread, UNS-2B\u003c\/td\u003e\n\u003ctd colspan=\"2\" align=\"center\"\u003eExternal Thread, UNS-2A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"evenRow\"\u003e\n\u003ctd class=\"leftBorder\" align=\"left\" width=\"150\"\u003e\u003cstrong\u003eMin Major Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.0350\"\u003c\/td\u003e\n\u003ctd align=\"left\" width=\"150\"\u003e\u003cstrong\u003eMax Major Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.0337\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"leftBorder\" align=\"left\"\u003e\u003cstrong\u003eMin Pitch Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.0188\"\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eMin Major Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.0286\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"evenRow\"\u003e\n\u003ctd class=\"leftBorder\" align=\"left\"\u003e\u003cstrong\u003eMax Pitch Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.0245\"\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eMax Pitch Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.0175\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"leftBorder\" align=\"left\"\u003e\u003cstrong\u003eMin Minor Diameter\u003cbr\u003e(and 83.3% of Thread)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.008\"\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eMin Pitch Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.0131\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"evenRow\"\u003e\n\u003ctd class=\"leftBorder\" align=\"left\"\u003e\u003cstrong\u003eMax Minor Diameter\u003cbr\u003e(and 64.9% of Thread)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.014\"\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eMax Minor Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e4.0066\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Fosco Connect","offers":[{"title":"Default Title","offer_id":49083746189568,"sku":"T-SM4RR","price":54.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/18512-xl.jpg?v=1785204429","url":"https:\/\/alotechparts.com\/products\/t-sm4rr-sm4-retaining-ring-for-o4-mounts","provider":"Alo Tech Solutions","version":"1.0","type":"link"}