{"product_id":"vlier-prm12p-locking-pull-ring-plunger-m12x1-75-steel","title":"Vlier PRM12P Locking Pull Ring Plunger M12x1.75 Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER PRM12P is a locking pull ring spring plunger designed for precision indexing, positioning, and holding applications in mechanical assemblies. It features an M12x1.75 thread and a steel body with a 1.4-inch thread length. The 8mm plunger diameter delivers an initial end force of 11 N, increasing to a final end force of 22 N, making it suitable for moderate-load retention tasks. The locking pull ring element locks the plunger in the retracted position, allowing hands-free access during part loading or tooling changes. Mechanical assemblers and maintenance technicians install this plunger in jigs, fixtures, machine frames, and similar industrial equipment.\u003c\/p\u003e\u003cp\u003eThis plunger is suited for use in precision fixtures, workholding equipment, jigs, and tooling assemblies where a repeatable spring-loaded detent or locking position is required. The pull ring lock feature makes it practical in applications where the plunger must stay retracted without constant manual pressure. It is installed by threading it into a tapped M12x1.75 hole in a metal workpiece, plate, or housing.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLocking pull ring holds plunger in fully retracted position for hands-free operation\u003c\/li\u003e\n\u003cli\u003eM12x1.75 thread with 1.4-inch thread length for secure installation in tapped holes\u003c\/li\u003e\n\u003cli\u003e8mm plunger diameter with 12.7mm plunger projection at full extension\u003c\/li\u003e\n\u003cli\u003eEnd force range from 11 N initial to 22 N final for consistent detent resistance\u003c\/li\u003e\n\u003cli\u003eSteel construction for durability in industrial and mechanical environments\u003c\/li\u003e\n\u003cli\u003eCompact 25mm ring diameter and 0.6-inch head height for tight-clearance installations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct installation component for equipment requiring an M12x1.75 locking pull ring plunger in jigs, fixtures, or mechanical assemblies.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eA licensed machinist or mechanical technician should verify the receiving bore and thread condition before installation. Ensure the mating assembly is de-energized and stationary before installing or removing the plunger. Use appropriate thread engagement depth per standard fastener practice to avoid stripping the tapped hole. Do not exceed the rated end force by forcing the plunger beyond its designed projection range.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M12x1.75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.4 inches (35.56mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Diameter\u003c\/strong\u003e: 8mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 12.7mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 2 inches (50.8mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 51mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 35.56mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.6 inches (15.24mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Diameter\u003c\/strong\u003e: 25mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 11 N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 22 N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Type\u003c\/strong\u003e: Locking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VLIER\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: PRM12P\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51985524752690,"sku":"PRM12P","price":45.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/027fc3ec1e05e2dd18cf43e2a0853bf8_55e421d6-96b8-4172-97f1-9ef27df96f93.jpg?v=1789985535","url":"https:\/\/voomisupply.com\/products\/vlier-prm12p-locking-pull-ring-plunger-m12x1-75-steel","provider":"Voomi Supply","version":"1.0","type":"link"}