NanoTight™ Fittings

These 1.6" long sleeves facilitate connecting capillary tubing into ports designed for 1/32" OD tubing. Please refer to the product listing to select the appropriate sleeve for your capillary OD size. For instance, choose F-376 for 360 µm OD and F-373 for 190 µm OD capillary tubing. These sleeves are pressure rated to 1750 psi (121 bar) and can be used at up to 50ºC.

Use 1/32" OD PEEK or Teflon PFA Sleeves to connect capillary tubing with the following:

  • The F-113 Ferrule and Two-Piece Fingertight Fittings for 10-32 ports
  • The F-112 and P-416BLK MicroTight® Fittings for our Nano Flow Sensor - 1/32" OD PEEK Tubing Sleeves only
  • The 1/32" OD MicroTight Fittings
  • The Rheodyne® RheFlex® M4 Fitting for MX Module applications
  • The M-645 Valco®-Compatible Fitting for Valco Nanovolume® valve applications

Clockwise, starting at top: 1/16" OD PEEK Tubing Sleeves with F-140 Fitting; 1/32 OD PEEK Tubing Sleeves with F-126H Fitting; 1/32" OD FEP Tubing Sleeves with F-126S Fitting. Fittings and tubing not included.

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Our Fingertight Ferrule is designed specifically for use with our two-piece fittings. It is offered in both biocompatible PEEK and solvent resistant Tefzel® (ETFE). It has a 10-32 coned port configuration and is for a 1/16" Tubing OD. It is available in natural color PEEK and a natural color 10 Pack, natural color Tefzel (ETFE) and a natural color Tefzel (ETFE) 10 pack.


Our Short NanoTight Fitting offers the best available option for connecting capillary tubing into standard 10-32 threaded, coned ports normally designed for 1/16” OD tubing. When combined with NanoTight® Tubing Sleeves, these fittings work with tubing ODs from 70µm to 1mm. The ferrule is made from softer Tefzel (ETFE) material allowing ease of connection. This also comes in a 10 pack.