Sigma Fittings

No other pneumatic fittings install so quickly or so easily as SIGMA fittings, None! Rugged, heavy-duty SIGMA Fittings feature an advanced industrial design suitable for air pressures to 150 PSI. The tapered bore design provides a large sealing surface without; O-rings, and eliminates the requirement for precise square-cut tubing.

A permanently retained locking sleeve can't be lost or removed, never wears, and always assures proper closing pressure. No tools needed. Simply pull to open - push to close.

Tough plastic body and thread totally eliminates corrosion and prevents damage to components caused by cross threading.

Modified pipe thread ensures a positive seal without Teflon tapes, pipe sealants or excessive torque.

Surprisingly, SIGMA fittings are the most inexpensive of their type on the market. Fittings are available for 5/32, 1/4, and 3/8 O.D. tubings and with 1/8, 1/4 or 3/8 NPT thread, or 10-32 straight thread. 10-32 fittings use a brass insert and include a sealing washer.