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
STI Series

Product Options

Please confirm that your Part Number is correct and adjust the other selections below to meet your application's requirements.

Clear

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 Carton 10,000 1 1,000 100 389.00 97.30 34.06 1
STI-5/8 14-20 Black 5/8" 14-20 .083-.035 Sample 5,000 1 1,000 100 232.50 116.20 40.67 2
STI-3/4 14-20 Black 3/4" 14-20 .083-.035 Carton 5,000 1 1,000 100 269.00 188.20 65.86 3
STI-7/8 14-20 Black 7/8" 14-20 .083-.035 Sample 3,000 1 1,000 100 207.30 172.60 60.41 4
STI-1 10-14 Black 1" 10-14 .134-.083 Carton 2,500 1 1,000 100 175.25 245.40 85.94 5
STI-1 14-20 Black 1" 14-20 .083-.035 Carton 2,500 1 1,000 100 175.25 245.40 85.94 6
STI-1-1/8 14-20 Black 1 1/8" 14-20 .083-.035 Sample 2,000 1 500 50 238.00 208.25 72.89 7
STI-1-1/4 10-14 Black 1 1/4" 10-14 .134-.083 Carton 1,600 1 500 50 194.72 213.25 74.63 8
STI-1-1/4 14-20 Black 1 1/4" 14-20 .083-.035 Carton 1,600 1 500 50 194.72 213.25 74.63 9
STI-1-3/8 14-20 Black 1 3/8" 14-20 .083-.035 Kit Pack 1,000 1 500 50 360.00 449.90 157.47 10
STI-1-1/2 10-14 Black 1 1/2" 10-14 .134-.083 Carton 1,000 1 500 50 200.80 351.40 122.99 11
STI-1-1/2 14-20 Black 1 1/2" 14-20 .083-.035 Carton 1,000 1 500 50 200.80 351.50 123.02 12
STI-40 MM 14-20 Black 40 mm 14-20 2.0 -1.0 mm Carton 1,000 1 500 50 158.20 276.85 96.90 13
STI-1-3/4 10-14 Black 1 3/4" 10-14 .134-.083 Sample 500 1 250 25 136.60 239.05 83.67 14
STI-50 MM 11-20 Black 50 mm 11-20 3.2-1.0 mm Carton 500 1 250 25 311.40 544.95 190.73 15
STI-2 10-14 Black 2" 10-14 .134-.083 Carton 500 1 250 25 156.10 273.18 95.62 16
STI-2 14-20 Black 2" 14-20 .083-.035 Sample 500 1 250 25 156.10 273.18 95.61 17
STI-2-3/8 6-10 Black 2 3/8" 6-10 .203-.134 Carton 250 1 100 10 165.20 231.28 80.95 18
STI-60 MM 6-11 Black 60 mm 6-11 5.0-3.0 mm Carton 250 1 100 10 160.03 224.04 78.41 19
STI-2-1/2 10-14 Black 2 1/2" 10-14 .134-.083 Kit Pack 250 1 100 10 181.88 254.63 89.12 20
STI-3 10-14 Black 3" 10-14 .134-.083 Carton 200 1 50 10 195.78 171.31 119.91 21
STI-80 MM 5-13 Black 80 mm 5-13 2.5-5.6 mm Carton 125 1 50 5 191.24 267.74 93.71 22
STI-3-1/2 6-11 Black 3 1/2" 6-11 .194-.120 Kit Pack 100 1 25 5 185.76 162.54 113.78 23
STI-4 7-11 Black 4" 7-11 .179-.120 Carton 108 1 60 5 201.30 391.42 114.16 24
STI-5 7-11 Black 5" 7-11 .179-.120 Carton 60 1 25 5 128.72 187.72 131.40 25
STI-6 7-11 Black 6" 7-11 .179-.120 Carton 48 1 12 5 212.39 185.84 271.02 26

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