Upchurch / IDEX Super Flangeless™ Fittings provide the highest pressure holding capability in a flat-bottom fitting system that we offer. Our unique design eliminates loosening of fittings due to tubing twist and holds tight even through vibration. Our high pressure fittings are excellent for tubing assemblies and those times when connections need to be broken frequently.
Upchurch Super Flangeless Nuts and Fittings

Item Name | Product Image | Price |
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Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Natural, Single - P-331Super Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Natural, Single Part Number: P-331 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific... |
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£3.66![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Orange, Single - P-331ORSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Orange, Single Part Number: P-331OR Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific... |
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£6.73![]() Min: 25 |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Yellow, Single - P-331YSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Yellow, Single Part Number: P-331Y Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch... |
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£3.61![]() Min: 25 |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PPS, Natural, 10/pk - P-381XSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PPS, Natural, 10 per pack Part Number: P-381X Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch... |
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£28.35![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PPS, Natural, 100/pk - P-381CSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PPS, Natural, 100 per pack Part Number: P-381C Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch... |
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Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PPS, Natural, Single - P-381Super Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PPS, Natural, Single Part Number: P-381 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific /... |
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£3.27![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK, Natural, Single - P-131Super Flangeless Nut for 1/8" OD Tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK, Natural, Single Part Number: P-131 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch... |
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£5.73![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, Short, 1/4-28 Flat Bottom, Headless Knurl, PEEK, Natural, 10/pk - P-336XSuper Flangeless™ Nut for 1/8” OD Tubing, Short, 1/4-28 Flat Bottom, Headless Knurl, PEEK, Natural, 10 per pack Part Number: P-336X Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This... |
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£33.66![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, Short, 1/4-28 Flat Bottom, Headless Knurl, PEEK, Natural, 100/pk - P-336CSuper Flangeless™ Nut for 1/8” OD Tubing, Short, 1/4-28 Flat Bottom, Headless Knurl, PEEK, Natural, 100 per pack Part Number: P-336C Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This... |
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Live chat below or contact us for latest price. ... more info |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, Short, 1/4-28 Flat Bottom, Headless Knurl, PEEK, Natural, Single - P-336Super Flangeless™ Nut for 1/8” OD Tubing, Short, 1/4-28 Flat Bottom, Headless Knurl, PEEK, Natural, Single Part Number: P-336 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch... |
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£3.61![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, Short, M6 Flat Bottom, Standard Knurl, PEEK, Black, 10/pk - P-319XSuper Flangeless™ Nut for 1/8” OD Tubing, Short, M6 Flat Bottom, Standard Knurl, PEEK, Black, 10 per pack Part Number: P-319X Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch... |
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£33.66![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, Short, M6 Flat Bottom, Standard Knurl, PEEK, Black, 100/pk - P-319CSuper Flangeless™ Nut for 1/8” OD Tubing, Short, M6 Flat Bottom, Standard Knurl, PEEK, Black, 100 per pack Part Number: P-319C Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This... |
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Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, Short, M6 Flat Bottom, Standard Knurl, PEEK, Black, Single - P-319Super Flangeless™ Nut for 1/8” OD Tubing, Short, M6 Flat Bottom, Standard Knurl, PEEK, Black, Single Part Number: P-319 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific... |
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£3.66![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, Standard Knurl, Dupont PFA, Natural, 100/pk - P-400CSuper Flangeless™ Nut for 1/8" OD Tubing, Standard Knurl, Dupont PFA, Natural, 100 per pack Part Number: P-400C Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific / IDEX... |
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Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, Standard Knurl, Dupont PFA, Natural, Single - P-400Super Flangeless™ Nut for 1/8" OD Tubing, Standard Knurl, Dupont PFA, Natural, Single Part Number: P-400 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific / IDEX Health... |
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£4.19![]() |
Upchurch Scientific Super Flangeless Nut for 3/16 inch OD Tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK, Black, 10/Pk - P-137XSuper Flangeless™ Nut for 3/16" OD Tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK, Black, 10 per pack Part Number: P-137X Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch... |
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£53.27![]() |
Upchurch Scientific Super Flangeless Nut for 3/16 inch OD Tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK, Black, 100/pk - P-137CSuper Flangeless™ Nut for 3/16" OD Tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK, Black, 100 per pack Part Number: P-137C Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch... |
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Live chat below or contact us for latest price. ... more info |
Upchurch Scientific Super Flangeless Nut for 3/16 inch OD Tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK, Black, Single - P-137Super Flangeless™ Nut for 3/16" OD Tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK, Black, Single Part Number: P-137 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific /... |
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£5.45![]() |
Upchurch Scientific Super Flangeless Nut/Ferrule Fitting System for 3/16 inch OD tubing, 5/16-24 Flat-Bottom, Standard Knurl, 10/pk - XP-137XSuper Flangeless™ Nut/Ferrule Fitting System for 3/16” OD tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK Black /Tefzel ETFE Green / Stainless Steel, 10 per pack Includes - P-140 Super Flangeless Ferrule and P-137 Nut ... |
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Live chat below or contact us for latest price. ... more info |
Upchurch Scientific Super Flangeless Nut/Ferrule Fitting System for 3/16 inch OD tubing, 5/16-24 Flat-Bottom, Standard Knurl, Single - XP-137Super Flangeless™ Nut/Ferrule Fitting System for 3/16” OD tubing, 5/16-24 Flat-Bottom, Standard Knurl, PEEK Black / Tefzel ETFE Green / Stainless Steel, Single Includes - P-140 Super Flangeless Ferrule and P-137 Nut Part... |
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£9.72![]() Min: 25 |