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Amazon.com: Prescott Plastics 1 1/2” (38.1 mm) Square Plastic Plug Insert, Black End Cap for Metal Tubing, Fences, Glide Protection for Chairs and Furniture (10 Pack) : Industrial & Scientific
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TCO glass plug cycled open in well with nitrogen-filled tubing saves A/S Norske Shell 24 hours' rig time - TCO
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Ideal Vacuum | Swagelok Tube Fitting, 1/8 in Plug, Stainless Steel, Gaugeable, Pack of 2, PN: SS-200-P
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