MicroTight® fittings

Comprehensive fitting system for capillary tubing

MicroTight® One-Piece fittings are designed for use with the NanoPort™ and MicroTight® unions, adapters and inline microfilters. Specifically made for 360 µm OD tubing, 1/32” OD tubing, or IDEX MicroTight® tubing sleeves (0.025” OD), these fittings make superior fingertight connections with capillary tubing into 6-32 coned ports.

The MicroTight® family also includes a female nut matched with one of five dedicated ferrules for connecting specific tubing ODs into 5/16-24 coned ports. While the female nuts may be used with any of the separate MicroFerrules, the MicroFerrules themselves are port-specific and are thus not interchangeable.

MicroTight® fittings are constructed from PEEK, pressure rated to 4,000–5,000 psi (276–345 bar), and can withstand temperatures up to 125 °C. Some of these fitting designs are also available in IDEX proprietary PEEK blend (PK). These MicroTight® VHP PK fittings are pressure rated to 15,000 psi (1,035 bar) and can tolerate temperatures up to 200 °C.

  • Comprehensive fitting system for connecting capillary tubing
  • Made from PEEK polymer
  • Tubing sleeves for 70–520 µm OD capillaries
  • Some designs also available in VHP PK version with higher pressure rating

Product details

MicroTight® standard fittings

MicroTight® VHP PK fittings


Consult the Periodic Table of Analytical Fittings for a quick overview, the Fittings 101 for guidance and learning, and the IDEX Catalogue for product details, or contact Biotech Fluidics for expert advice.

Periodic table of
analytical fittings

Fittings 101
guide booklet

Complete IDEX

Any questions?

If you have any inquiries about our products and services, we’re here to help.

Phone: +46 300 56 91 80
Email: info@biotechfluidics.com