Techcon TE721050PK 21 Gauge Purple Dispense Needle, 1/2 Inch, 50 Pack

Description

TE721050PK Needle is a Techcon TE Series premier dispense tip for precise fluid placement from compatible syringes, valves, and dispensing systems. This pack includes 50 purple 21 gauge tips with a 1/2 inch stainless cannula, color-coded hub, and luer lock connection. Use it when the process needs a smaller bead than 18 or 20 gauge tips but still requires practical flow for adhesives, primers, solvents, or light assembly fluids. For related products, browse Chemical Concepts dispensers, mixers, and nozzles. Techcon product information is available from Techcon.

TE721050PK Needle Details

Techcon lists this SKU as a TE needle with 21 gauge size, 1/2 inch length, purple color, 100 psi maximum operating pressure, and 50 count quantity. The TE guide identifies 21 gauge tips with a 0.020 inch, 0.508 mm inside diameter. That size supports controlled dots, narrow beads, and touch-up placement where larger needles would leave too much material.

TE721050PK Needle Applications

The short 1/2 inch cannula works well when the target is close to the operator and the setup benefits from a stiff, compact tip. It can be used for adhesive dots, threadlocking-style placement, primer work, electronic assembly support, and fixture touch-ups where the bead needs to stay tight. The purple hub also helps teams distinguish the 21 gauge tip from nearby green, pink, blue, and amber sizes.

Setup Notes

Use the lowest practical pressure that gives consistent flow. Small-gauge tips can clog faster when materials contain fillers, skin over, or begin curing in the cannula. If the bead tails, pulses, or narrows during a run, replace the tip and check whether the fluid is too thick for the selected gauge. Confirm chemical compatibility before using aggressive solvents or specialty fluids.

Ordering Guidance

Stock this 50 pack for workcells that need repeatable small beads without relying on hand-cut tubing. Keep adjacent gauges nearby for trials because a one-gauge change can noticeably affect flow. For help matching tip length, gauge, and dispense pressure, contact Chemical Concepts at (800) 220-1966 or [email protected].