800.344.7584 REQUEST A CATALOG HOME PRODUCTS CUSTOM COMPANY CONTACT LOGIN STI SERIES PLUGS, TUBING INSERTS HOME / PRODUCTS / PLUGS / TUBING INSERTS / STI SERIES SQUARE TUBING INSERTS STI Series square tubing inserts are finishing plugs that can be used in a variety of square applications. External tapered ribs ensure a secure fit in a wide range of tubing gauges. Color: Black Material: Low Density Polyethylene LDPE service temperature: 150°F (66°C) Some parts are also available with domed and/or other types of top profiles Additional sizes available (consult factory for details) RoHS Compliant MAKE YOUR SELECTION BELOW PART NO. COLOR TO FIT TUBE SIZE TO FIT TUBE GAUGE TUBE WALL THICKNESS PRODUCT OPTIONS STI-1/2 16-18 Black 1/2" 16-18 .065 -.049 10,000 1 STI-5/8 14-20 Black 5/8" 14-20 .083-.035 5,000 1 STI-3/4 14-20 Black 3/4" 14-20 .083-.035 5,000 1 STI-7/8 14-20 Black 7/8" 14-20 .083-.035 3,000 1 STI-1 10-14 Black 1" 10-14 .134-.083 2,500 1 STI-1 14-20 Black 1" 14-20 .083-.035 2,500 1 STI-1-1/8 14-20 Black 1 1/8" 14-20 .083-.035 2,000 1 STI-1-1/4 10-14 Black 1 1/4" 10-14 .134-.083 1,600 1 STI-1-1/4 14-20 Black 1 1/4" 14-20 .083-.035 1,600 1 STI-1-3/8 14-20 Black 1 3/8" 14-20 .083-.035 1,000 1 STI-1-1/2 10-14 Black 1 1/2" 10-14 .134-.083 1,000 1 STI-1-1/2 14-20 Black 1 1/2" 14-20 .083-.035 1,000 1 STI-40 MM 14-20 Black 40 mm 14-20 2.0 -1.0 mm 1,000 1 STI-1-3/4 10-14 Black 1 3/4" 10-14 .134-.083 500 1 STI-50 MM 11-20 Black 50 mm 11-20 3.2-1.0 mm 500 1 STI-2 10-14 Black 2" 10-14 .134-.083 500 1 STI-2 14-20 Black 2" 14-20 .083-.035 500 1 STI-2-3/8 6-10 Black 2 3/8" 6-10 .203-.134 250 1 STI-60 MM 6-11 Black 60 mm 6-11 5.0-3.0 mm 250 1 STI-2-1/2 10-14 Black 2 1/2" 10-14 .134-.083 250 1 STI-3 10-14 Black 3" 10-14 .134-.083 200 1 STI-80 MM 5-13 Black 80 mm 5-13 2.5-5.6 mm 125 1 STI-3-1/2 6-11 Black 3 1/2" 6-11 .194-.120 100 1 STI-4 7-11 Black 4" 7-11 .179-.120 108 1 STI-5 7-11 Black 5" 7-11 .179-.120 60 1 STI-6 7-11 Black 6" 7-11 .179-.120 48 1 MORE OPTIONS TAPERED PLUGS Tapered Series PULL RING PLUGS PR Series PULL PLUGS P Series ELECTRICAL CONNECTOR PLUGS YP Series SHEET METAL PLUGS F&R Series FLARED FITTING PLUGS FP Series FLAT FITTING PLUGS FOR ORFS FITTINGS FFP Series PUSH IN PLUGS PI Series UNIVERSAL PLUGS UP Series THREADED HYDRAULIC PLUGS HP Series LONG THREADED HYDRAULIC PLUGS HPL Series HEAVY DUTY LONG THREADED HYDRAULIC PLUGS HPL Nylon Series SILICONE RUBBER PLUGS SLP Series SILICONE PULL PLUGS SLPP Series SILICONE FLANGELESS PLUGS SFP Series DUAL WASHER PULL PLUGS DWPP Series DUAL SILICONE WASHER PLUGS DSWP Series SILICONE DUAL PLUGS SDP Series SILICONE FLANGED PULL PLUGS SFPP Series SILICONE FLANGED MASKING PLUGS SFMP Series SILICONE MULTI-FLANGED PLUGS SMFP Series SILICONE MOUSE TAIL PLUGS SMTP Series SILICONE HOLLOW TAPERED PLUGS SHTP Series SILICONE HOLLOW TAPERED PLUGS WITH PULL TABS SHPT Series SILICONE FLANGED PLUGS SLFP Series SILICONE THICK FLANGED PLUGS STFP Series SILICONE WASHER PULL PLUGS SWPP Series SILICONE PLUGS WITH PULL TABS SPPT Series ROUND TUBING INSERTS RTI Series RECTANGULAR TUBING INSERTS REC Series COMMITTED TO A BETTER CUSTOMER EXPERIENCE When you call Polymer Molding Inc. during normal business hours, your call will be answered by a live person, every time. It is our sincere commitment to lead the market in exceptional customer service, because you deserve to do business with a company that truly cares about you and your product needs. Our knowledgeable, friendly and helpful sales and customer service representatives will take the time to help you select the best parts for your applications at the most competitive prices in the industry. We are here to answer questions, process your orders, and prepare your shipments quickly and efficiently. Click the button below to compare our pricing and see the Polymer Molding difference. REQUEST PRICING IMPORTANT INFORMATION ABOUT US NEWS & EVENTS COMPANY DIRECTORY CONTACT US MATERIAL SPECIFICATIONS ISO 9001:2015 CERTIFICATION GETTING STARTED APPLICATION FOR CREDIT TERMS & CONDITIONS REQUEST A CATALOG REQUEST SAMPLES REQUEST PRICING PRODUCTS & SERVICES PRODUCTS CUSTOM PARTS SECONDARY OPERATIONS QUALITY CONTROL GET IN TOUCH Polymer Molding 1655 West 20th Street Erie, PA 16502 Phone: 800.344.7584 Fax: 888.257.5566 CONTACT US © 2021 Polymer Molding | Manufacturing Website Design by weCreate Website Design and Marketing