{"product_id":"adjustable-screw-for-new-2022-clamp-1693-1-and-1693-1s-round-clamp-profile","title":"Adjustable screw for NEW (2022) clamp 1693.1 and 1693.1S (round clamp profile)","description":"\u003cp\u003eThe 1693.23 is the adjustable screw for Unior's Pro repair clamps: the threaded spindle assembly that sets how far the jaws open and how hard they close on a frame tube. Unior lists it as the replacement adjuster for both current clamp heads, the auto-adjustable 1693.1 and the manually adjustable 1693.1S. On the manual clamp it is the screw you turn at every tube-diameter change, so when the threads stop holding a setting, or the spindle picks up a bend from an overtorqued handle, a new screw puts the clamp back to spec without replacing the whole head.\u003c\/p\u003e\n\u003cp\u003eThis is the newer of the two adjustable screws Unior makes for these clamps. From mid-2022 the 1693.1 and 1693.1S moved to round-style clamping jaws, 50 mm tall, and the adjustable screw changed with the jaws. Unior lists this version, code 629253, for the round-jaw clamps only.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe 1693.23 fits the round-jaw generation of both Pro repair clamp heads:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/pro-repair-clamp-auto-adjustable\"\u003ePro Repair Clamp, Auto Adjustable 1693.1\u003c\/a\u003e, round-style jaws, mid-2022 onward\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/pro-repair-clamp-manually-adjustable\"\u003ePro Repair Clamp, Manually Adjustable 1693.1S\u003c\/a\u003e, round-style jaws, mid-2022 onward\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your clamp has the older square-style jaws, 70 mm or 90 mm tall, it takes the \u003ca href=\"\/products\/adjustable-screw-for-clamp-1693-1-and-1693-1s-1693-21\"\u003e1693.21 adjustable screw\u003c\/a\u003e instead. And if the clamp on your stand is the Master Shop 1693.1M or the quick-release Pro Shop 1693.1Q, neither screw applies: those clamps use different pressure mechanisms, and the 1693.1Q has its own \u003ca href=\"\/products\/set-of-spare-parts-for-1693-1q-1693-1q-sp-1\"\u003erebuild kit\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eHow to tell which screw you need\u003c\/h2\u003e\n\u003cp\u003eLook at the jaws, not the stand. Round-profile jaws 50 mm tall mean a mid-2022-or-later clamp and this screw, the 1693.23. Flat-faced square-style jaws at 70 mm or 90 mm mean the earlier clamp and the 1693.21. The two generations of clamp look close to identical from across a workshop, and so do the two screws, so a quick ruler check against the jaw height settles it before you order.\u003c\/p\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eArticle number: 1693.23\u003c\/li\u003e\n\u003cli\u003eUnior code: 629253\u003c\/li\u003e\n\u003cli\u003eFits: 1693.1 and 1693.1S Pro repair clamps with round-style clamping jaws (50 mm, mid-2022 onward)\u003c\/li\u003e\n\u003cli\u003eNot for: square-style jaws (70 mm or 90 mm tall; use the 1693.21) or the 1693.1M and 1693.1Q clamps\u003c\/li\u003e\n\u003cli\u003eWeight: 150 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče, Slovenia\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 1693.23 is that thinking applied to a wear point: the adjuster that carries the clamp's daily use is available on its own, so a hard-working clamp head stays in service instead of being replaced.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eCheck the jaw height before you order, even if you know when you bought the stand. Clamp heads get swapped between stands in busy workshops, and the mid-2022 changeover means two stands bought months apart can take different screws. Round jaws at 50 mm: this screw. Square jaws at 70 or 90 mm: the 1693.21. And if the clamp head itself is tired, weigh an upgrade instead of a repair: \u003ca href=\"\/blogs\/tech-tips\/how-to-choose-a-bike-repair-stand\"\u003eHow to choose a bike repair stand →\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhich clamps does the 1693.23 adjustable screw fit?\u003c\/strong\u003e It fits Unior's Pro repair clamp heads 1693.1 (auto adjustable) and 1693.1S (manually adjustable) built from mid-2022 onward, the versions with round-style clamping jaws 50 mm tall. Unior lists it as the replacement adjuster for both models under code 629253.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know whether my clamp needs the 1693.23 or the 1693.21?\u003c\/strong\u003e Check the jaws. Round-profile jaws about 50 mm tall mean a mid-2022-or-later clamp, which takes this screw, the 1693.23. Flat-faced square-style jaws 70 mm or 90 mm tall mean the earlier generation, which takes the 1693.21 instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1693.23 fit the Master Shop 1693.1M or Pro Shop 1693.1Q clamps?\u003c\/strong\u003e No. The 1693.1M and 1693.1Q use different pressure-setting mechanisms, so neither the 1693.23 nor the 1693.21 applies to them. The 1693.1Q has its own rebuild kit, sold separately as the 1693.1Q-SP.1.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the adjustable screw do on the clamp?\u003c\/strong\u003e It is the threaded spindle that sets the jaw opening and the closing pressure. On the manually adjustable 1693.1S you turn it to match the frame tube before closing the lever. A worn or bent screw is why a clamp stops holding its pressure setting, and replacing it restores the clamp without a new head.\u003c\/p\u003e","brand":"Unior USA","offers":[{"title":"Default Title","offer_id":45902538965036,"sku":"629253","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0012\/5786\/5260\/files\/1693.23_629253_image_1024.jpg?v=1785873437","url":"https:\/\/uniorusa.com\/products\/adjustable-screw-for-new-2022-clamp-1693-1-and-1693-1s-round-clamp-profile","provider":"Unior USA","version":"1.0","type":"link"}