C Series End Caps protect threaded or non-threaded tubing, rods, pipe or shipping tubes. Snug friction fit provides low cost protection.

Standard material is low density polyethylene. 

  • Low Cost
  • Use on parts with or without threads
  • Excellent Protection

Standard is Red. Other colors available upon request.

View Stock Sizes

Threaded End Caps Diagram

End Caps
Part Name Inside Diameter (in) Length (in)
C-1/8 0.125 0.590
C-5/32 0.156 0.560
C-3/16 0.187 0.590
C-7/32 0.219 0.750
C-1/4 0.250 0.880
C-9/32 0.281 0.750
C-5/16 0.313 0.880
C-3/8 0.375 0.880
C-7/16 0.438 0.880
C-1/2 0.500 0.880
C-9/16 0.563 0.880
C-5/8 0.625 0.880
C-11/16 0.687 0.880
C-23/32 0.718 0.715
C-3/4 0.750 0.880
C-25/32 0.781 1.000
C-13/16 0.813 0.880
C-7/8 0.875 0.880
C-15/16 0.938 1.000
C-1 1.000 1.000
C-1-1/16 1.063 1.000
C-1-1/8 1.125 1.000
C-1-3/16 1.187 1.000
C-1-1/4 1.250 1.000
C-1-5/16 1.312 1.000
C-1-3/8 1.375 1.000
C-1-1/2 1.500 1.000
C-1-5/8 1.625 1.000
C-1-3/4 1.750 1.000
C-1-7/8 1.875 1.000
C-2 2.000 0.880
C-2-1/8 2.125 1.000
C-2-1/4 2.250 0.880
C-2-3/8 2.375 0.880
C-2-1/2 2.500 0.880
C-2-3/4 2.750 1.000
C-3 3.000 1.000
C-3-1/8 3.125 1.380
C-3-1/4 3.250 1.250
C-3-1/2 3.500 1.380

While rigid polyethylene caps are often one of the lowest cost options for covering bolts, tubes, pipes, and rods, C-Series End Caps are not flexible or pliable like caps made from our vinyl materials. For greater flexibility, consider our line of vinyl Short Caps as alternatives.

  • Made from a flexible vinyl material, StockCap Short Caps typically provide a more secure fit than the rigid polyethylene caps.
  • Unlike C-Series caps, vinyl Short Caps can be made in virtually any length one desires with no additional tooling charges. 
  • Vinyl caps are also typically easier to install and do not crack, split, or shred in the way that many polyethylene caps will over time.
  • Short Caps can be manufactured in wide variety of colors and materials without extensive lead times.

Short Caps

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