DK-LOK Two-Ferrule Tube Fitting
Coverage Tube OD range 1/8" through 2" fractional and 3 mm through 50 mm metric. Materials: 316 SS primary, 304 SS, and brass. End connections include tube-to-tube, tube-to-NPT male/female, and weld fittings. [VERIFY] face-seal line (VCR/VCO-equivalent) availability and the per-size pressure tables, which depend on the specific tube OD and wall thickness selected.
Two-ferrule (front + back) compression tube fitting. Tubing is fully annealed austenitic Type 316 or 304 seamless to ASTM A269 / A213. 316 SS rated for service from -425°F to +1200°F; allowable working pressure is calculated to ASME B31.3 Process Piping and B31.1 Power Piping using an S-value of 20,000 psi, and the fitting's pressure rating is governed by the connecting tube's rating. Dimensionally compatible with Swagelok and Parker A-LOK / CPI standards as a drop-in alternative.
Why DK-LOK here DK-LOK is dimensionally compatible with Swagelok and Parker A-LOK / CPI fittings, so it drops into existing instrumentation systems without redesign — the customer matches the installed part number and the geometry lines up. Pressure ratings are governed by recognized ASME B31.3 / B31.1 calculation, giving an auditable engineering basis. Strong on large-count instrumentation projects where a documented, code-based drop-in alternative carries real value.