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 1/16-1/32 inch OD Tubing, Short, 1/4-28 Flat-Bottom, Standard Knurl, PEEK, Orange, Single - LT-115ORSuper Flangeless™ Nut for 1/16" - 1/32" OD Tubing, Short, 1/4-28 Flat-Bottom, Standard Knurl, PEEK, Orange, Single Part Number: LT-115OR Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings... |
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Upchurch Scientific Super Flangeless Nut for 1/16-1/32 inch OD Tubing, Short, 1/4-28 Flat-Bottom, Standard Knurl, PEEK, Red, Single - LT-115RSuper Flangeless™ Nut for 1/16" - 1/32" OD Tubing, Short, 1/4-28 Flat-Bottom, Standard Knurl, PEEK, Red, Single Part Number: LT-115R Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings These... |
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£5.40![]() Min: 25 |
Upchurch Scientific Super Flangeless Nut for 1/16-1/32 inch OD Tubing, Short, 1/4-28 Flat-Bottom, Standard Knurl, PEEK, Yellow, Single - LT-115YSuper Flangeless™ Nut for 1/16" - 1/32" OD Tubing, Short, 1/4-28 Flat-Bottom, Standard Knurl, PEEK, Yellow, Single Part Number: LT-115Y Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings... |
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£3.70![]() Min: 25 |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Female Knurl, PEEK, Black, 10/pk - F-156XSuper Flangeless™ / Conical Adapter Replacement Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Female Knurl, PEEK, Black, 10 per pack Part Number: F-156X Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless... |
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£69.98![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Female Knurl, PEEK, Black, Single - F-156Super Flangeless™ / Conical Adapter Replacement Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Female Knurl, PEEK, Black, Single Part Number: F-156 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless... |
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£7.58![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Headless Knurl, PPS, Natural, 10/pk - P-387XSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Headless Knurl, PPS, Natural, 10 per pack Part Number: P-387X 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, Headless Knurl, PPS, Natural, 100/pk - P-387CSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Headless Knurl, PPS, Natural, 100 per pack Part Number: P-387C 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, Headless Knurl, PPS, Natural, Single - P-387Super Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Headless Knurl, PPS, Natural, Single Part Number: P-387 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific /... |
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£3.02![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin, Black, 10/pk - P-332XSuper Flangeless™ Nut for 1/8" OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin®, Black, 10 per pack Part Number: P-332X Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings These Upchurch... |
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£14.05![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin, Black, 100/pk - P-332CSuper Flangeless™ Nut for 1/8" OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin®, Black, 100 per pack Part Number: P-332C Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings These Upchurch... |
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£140.14![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin, Black, Single - P-332Super Flangeless™ Nut for 1/8" OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin®, Black, Single Part Number: P-332 Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings These Upchurch... |
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£1.52![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin, Blue, 100pk - P-332BCSuper Flangeless™ Nut for 1/8" OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin®, Blue, 100 per pack Part Number: P-332BC Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings These Upchurch... |
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£140.14![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin, Blue, Single - P-332BSuper Flangeless™ Nut for 1/8" OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, Delrin®, Blue, Single Part Number: P-332B Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings These Upchurch... |
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£1.52![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Black, 100/pk - P-331BLKCSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Black, 100 per pack Part Number: P-331BLKC 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, PEEK, Black, Single - P-331BLKSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Black, Single Part Number: P-331BLK 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, Blue, Single - P-331BSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Blue, Single Part Number: P-331B Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific /... |
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£6.78![]() Min: 25 |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Green, 100/pk - P-331GCSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Green, 100 per pack Part Number: P-331GC 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, PEEK, Green, Single - P-331GSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Green, Single Part Number: P-331G Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch Scientific /... |
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£3.75![]() |
Upchurch Scientific Super Flangeless Nut for 1/8 inch OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Natural, 10/pk - P-331XSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Natural, 10 per pack Part Number: P-331X 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, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Natural, 100/pk - P-331CSuper Flangeless™ Nut for 1/8” OD Tubing, 1/4-28 Flat Bottom, Standard Knurl, PEEK, Natural, 100 per pack Part Number: P-331C Categories: Fittings, Flat-Bottom Fittings, Fluidic Connections, Super Flangeless Fittings This Upchurch... |
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