Hy-Lok UK tube and pipe fittings provide leak-free connections for instrumentation, pneumatics, hydraulics, fluid delivery systems and other related industries.

With over 30 years' experience providing fitting solutions for a wide variety of applications, our products are guaranteed to be dependable and help you achieve the highest degree of efficiency.

Each of the fitting types provided by Hy-Lok is tailored to the exact requirements of your application. Our large inventory of JIC flare fittings, weld fittings, calibration, high pressure cone and thread fittings are all thoroughly tested for maximum quality control before it reaches our customers.

For more information on Hy-Lok tube and pipe fittings, we encourage you to explore our catalog below.

Hy-Lok Tube Fittings

Hy-Lok's flareless tube fittings feature a two-ferrule design that compensates for tolerances in tube O.D. and range in tube size from 1/16″ to 2″ (2mm to 38mm).

37° JIC Flare Fittings

Hy-Lok's flare fittings offer a wide range of sizes, configurations, and end connections.

DIN 2353 Fittings

Hylok DIN 2353 fittings are available in brass, carbon steel, and stainless steel with a size range of 4mm to 42mm combined with a wide selection of configurations.

Weld Fittings

Hy-Lok weld fittings range from 1/8″ T to 1″ T for tube to tube configurations and 1/8″ NPT to 1″ NPT for tube to male and female pipe configurations.

ZCO O-Ring Face Seal Fittings

O-Ring Fittings are made up of three basic components: female nut, gland, and body. The body contains a viton o-ring which is standard. Additional o-ring fitting materials are available on request.

ZCR Face Seal Fittings

Metal gasket face seal fittings meet or exceed semiconductor industry specifications for tube connections up to 1″ O.D. Hy-Lok ZCR gasket fittings have been tested to hold and exceed a leak rate of 10-9 torr.

Pipe Fittings

Hy-Lok precision machined pipe fittings are used for instrumentation and process control. Standard materials are 316 stainless steel, brass and carbon steel. Sizes range from 1/8″ thru 2″.

Calibration Fittings

Hy-Lok calibration fittings allow quick access to various differential pressure (DP) transmitters for calibration. Standard body material is 316 stainless steel, available in 1/4″ or 5/16″ dimensions.

JIS Bite Type Fittings

Hy-Lok single ferrule bite type design is available in many connections and configurations. Standard materials are carbon steel, brass and stainless steel. Sizes range from1/8″ thru 2″.

High Pressure Fittings

Offering the capability to reach extreme high pressures up to 60,000 PSI, fitting designs include medium and high pressure, with a Sour Gas option.

10K Fittings

Offering Branded 10K fittings and adaptors for all Offshore Applications

Additional Resources

Fluid Compatibility Guide

Product Catalogues

Certification Library