{"product_id":"vlier-spr375p-locking-pull-ring-plunger-3-8-16-stainless","title":"Vlier SPR375P Locking Pull Ring Plunger 3\/8-16 Stainless","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER SPR375P is a stainless steel locking pull ring plunger designed for precision indexing, positioning, and locking applications in mechanical assemblies. The pull ring locking mechanism holds the plunger in the retracted position until deliberately released, eliminating unintended engagement during operation. Thread size is 3\/8-16 with a thread length of 1.2 inches and a plunger diameter of 0.233 inches. End force ranges from 2 pounds initial to 4 pounds final, providing consistent, repeatable holding force. Stainless steel construction offers corrosion resistance in demanding environments. This component is typically installed by maintenance technicians, machine builders, and automation specialists working on jigs, fixtures, and positioning equipment.\u003c\/p\u003e\u003cp\u003eThe SPR375P suits applications where a plunger must be locked in the retracted position to allow free movement of a mating component before re-engagement. Common uses include tooling fixtures, indexing mechanisms, sliding assemblies, and panels requiring secure, releasable positioning. The locking pull ring allows the technician to retract and lock the plunger with one hand, freeing the other for alignment tasks. Stainless steel construction makes this plunger suitable for wash-down environments, food processing equipment, and other corrosion-sensitive installations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLocking pull ring retracts and holds plunger out of engagement until manually released\u003c\/li\u003e\n\u003cli\u003eThread size 3\/8-16 with 1.2 inch thread length for standard threaded-hole installation\u003c\/li\u003e\n\u003cli\u003eEnd force: 2 pounds initial to 4 pounds final for consistent positioning resistance\u003c\/li\u003e\n\u003cli\u003ePlunger diameter of 0.233 inches and projection of 0.375 inches\u003c\/li\u003e\n\u003cli\u003eFull stainless steel construction for corrosion resistance in harsh or wet environments\u003c\/li\u003e\n\u003cli\u003eCompact body length of 1.68 inches suits space-constrained assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-thread replacement or new-installation pull ring plunger for threaded bores sized 3\/8-16, as used in standard mechanical fixtures, tooling plates, indexing assemblies, and positioning jigs requiring a locking plunger element.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a 3\/8-16 threaded bore of sufficient depth to accept the 1.2 inch thread length. Ensure the mating bore is clean and free of debris before threading the plunger in by hand, then torque to the assembly specification for the host material. Power down or de-energize any equipment before servicing plunger assemblies in automated machinery. Avoid over-torquing stainless steel threaded components into dissimilar metal bores to prevent galling.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Diameter\u003c\/strong\u003e: 0.233 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 1.68 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 1.68 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1.2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.48 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Diameter\u003c\/strong\u003e: 0.98 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 4 pounds\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: Stainless Steel\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: SPR375P\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52002012823858,"sku":"SPR375P","price":34.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/027fc3ec1e05e2dd18cf43e2a0853bf8_981613c2-b0fd-40c9-9ed5-020df7b0aa4d.jpg?v=1789997697","url":"https:\/\/voomisupply.com\/products\/vlier-spr375p-locking-pull-ring-plunger-3-8-16-stainless","provider":"Voomi Supply","version":"1.0","type":"link"}