HOKE Gyrolok tube fittings for use in gas or liquid chromatography applications are available in a variety of user-required configurations. HOKE’s Chromatography Fittings feature low dead volumes, male nut designs, as well as configurations utilizing either press-fit or drop-in frits. For user convenience, both frit versions are available in a number of micron sizes. By combining the needs of the Chromatography Fitting with key Gyrolok features, such as controlled ferrule drive, the HOKE Chromatography Fitting offers capabilities and performance that are unmatched in the industry.

Pressure Ratings
HOKE Gyrolok Chromatography fittings are rated for working pressures higher than the tubing recommended for use. Refer to HOKE’s Tubing Data Charts for specific information.

Temperature Ratings
316 Stainless Steel: -325° F to +800° F (-200° C to +425° C)
Note: Intermittent use to 1200° F is possible, however prolonged exposure to temperatures over 800° F is not recommended.
Unit of Measure



N/A 316 Stainless Steel

T1 - Tube O.D.

N/A 1/8 in ReducingUnionMaleNutDimDraw.JPG

T2 - Tube O.D.

N/A 1/16 in


N/A 1.91 in


N/A .013 in

H1 - Hex Size

N/A 3/8 in

H2 - Hex Size

N/A 7/16 in

H3 - Hex Size

N/A 1/4 in

E Min

N/A 1.06 in


N/A 0.80 in

Features & Benefits

N/A Features
Low Dead Volume:
Press-fit or Drop-in Frits
Conical Diffusion Angle
Male Nut Configuration
Fritless Configurations
Controlled Ferrule Drive


  • Accurate analysis and measurement
  • Filter elements can be ordered factory installed (pressfit) or for field installation (drop-in)
  • 4 micron sizes are offered as standard, other sizes can be provided
  • Perform final filtering function for low volume fluids
  • Press-fit frit design reduces internal volume
  • Assures fluid contact over a greater surface, extending frit life while reducing unfiltered volume
  • Reduced internal volume
  • For use with G.C. columns or L.C.’s with screens
  • Long product life with outstanding remakeability
  • Fittings are interchangeable with those of certain other manufacturers (consult factory)

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