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STI Series

Plastic Pipe Plugs for Product Protection, Tubing Inserts
STI Series
Home / Products / Plugs / Tubing Inserts / STI Series

Square Tubing Inserts

Square tubing inserts, otherwise known as STI Series products, 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, and a sleek outer appearance ensures a flawless seam when installed. With square finishing plugs, you can spruce up the style of older furniture pieces, complete unfinished installation work, and keep unsightly interior components hidden from view. Learn more about our stock of these versatile square tubing inserts below.  

  • 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 diagram

Product Options

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

Make Your Selection Below

PART NO. COLOR TO FIT
TUBE SIZE		 TO FIT
TUBE GAUGE		 TUBE WALL
THICKNESS		 PRODUCT OPTIONS
STI-3.63 7-11 3.63" 7-11 .179-.120 Sample 150 1 50 10 246.26 271.04 189.73 0
STI-2-1/2 14-20 Black 2 1/2" 14-23 .083-.035 Sample 300 1 100 10 202.44 254.63 89.12 0
STI-1/2 16-18 Black 1/2" 16-18 .065 -.049 Select Pack 10,000 1 1,000 100 517.00 180.95 63.34 1,255
STI-5/8 14-20 Black 5/8" 14-20 .083-.035 Sample 5,000 1 1,000 100 517.00 180.95 63.34 1,256
STI-3/4 14-20 Black 3/4" 14-20 .083-.035 Carton 5,000 1 1,000 100 299.50 199.50 69.80 1,257
STI-7/8 14-20 Black 7/8" 14-20 .083-.035 Sample 3,000 1 1,000 100 231.00 183.00 64.00 1,258
STI-1 10-14 Black 1" 10-14 .134-.083 Select Pack 2,500 1 1,000 100 195.00 245.40 85.94 1,259
STI-1 14-20 Black 1" 14-20 .083-.035 Select Pack 2,500 1 1,000 100 195.00 245.40 85.94 1,260
STI-1-1/8 14-20 Black 1 1/8" 14-20 .083-.035 Kit Pack 2,000 1 500 50 265.00 208.25 72.89 1,261
STI-1-1/4 10-14 Black 1 1/4" 10-14 .134-.083 Kit Pack 1,600 1 500 50 216.80 213.25 74.63 1,262
STI-1-1/4 14-20 Black 1 1/4" 14-20 .083-.035 Select Pack 1,600 1 500 50 216.80 213.25 74.63 1,263
STI-1-3/8 14-20 Black 1 3/8" 14-20 .083-.035 Select Pack 1,000 1 500 50 400.70 449.90 157.47 1,264
STI-1-1/2 10-14 Black 1 1/2" 10-14 .134-.083 Kit Pack 1,000 1 500 50 223.40 351.50 123.02 1,265
STI-1-1/2 14-20 Black 1 1/2" 14-20 .083-.035 Carton 1,000 1 500 50 223.40 351.50 123.02 1,266
STI-40 MM 14-20 Black 40 mm 14-20 2.0 -1.0 mm Sample 1,000 1 500 50 265.00 276.85 96.90 1,267
STI-1-3/4 10-14 Black 1 3/4" 10-14 .134-.083 Sample 500 1 250 25 152.05 211.73 83.67 1,268
STI-50 MM 11-20 Black 50 mm 11-20 3.2-1.0 mm Carton 500 1 250 25 371.00 544.95 190.73 1,269
STI-2 10-14 Black 2" 10-14 .134-.083 Select Pack 500 1 250 25 173.75 273.18 95.62 1,270
STI-2 14-20 Black 2" 14-20 .083-.035 Kit Pack 500 1 250 25 173.75 273.18 95.61 1,271
STI-2-3/8 6-10 Black 2 3/8" 6-10 .203-.134 Sample 250 1 100 10 198.75 231.28 80.95 1,272
STI-60 MM 6-11 Black 60 mm 6-11 5.0-3.0 mm Sample 250 1 100 10 198.75 224.04 78.41 1,273
STI-2-1/2 10-14 Black 2 1/2" 10-14 .134-.083 Kit Pack 300 1 100 10 202.44 254.63 89.12 1,274
STI-3 10-14 Black 3" 10-14 .134-.083 Sample 200 1 50 10 272.38 171.31 119.91 1,275
STI-80 MM 5-13 Black 80 mm 5-13 2.5-5.6 mm Carton 125 1 50 5 202.71 267.74 93.71 1,276
STI-3-1/2 6-11 Black 3 1/2" 6-11 .194-.120 Carton 100 1 25 5 206.75 162.54 113.78 1,277
STI-4 7-11 Black 4" 7-11 .179-.120 Sample 108 1 60 5 224.05 391.42 114.16 1,278
STI-5 7-11 Black 5" 7-11 .179-.120 Select Pack 60 1 25 5 143.27 187.72 131.40 1,279
STI-6 7-11 Black 6" 7-11 .179-.120 Carton 48 1 12 5 236.39 185.84 271.02 1,280

More Options

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