John Guest® SuperSeal Acetal Union Connectors for Stainless Steel Tubing

Specially designed to provide extra grip on stainless steel tubing, John Guest® SuperSeal fittings feature a collet with integrally molded stainless steel teeth similar to the standard Super Speedfit® or push-to-connect designs. They also incorporate a hand-operated nut and wedge-shaped plastic washer to apply extra pressure to the collet and the double O-ring seals. This causes the collet teeth to bite thoroughly into the tube to provide grip while compressing the O-rings to further enhance sealing. This functionality makes SuperSeal fittings ideal for potable liquids and other food-quality applications that involve stainless steel tubing. The spanner tool, sold separately, is used when securing SuperSeal fittings to stainless steel tubing. One side is for use with 1/4" and 5/16" SuperSeal fittings, and the other side works with 3/8" SuperSeal fittings.

  • Acetal body with double nitrile O-rings
  • Lead-free
  • Easily connect & disconnect tubing
  • For use with stainless steel tubing
  • 5/16" maximum pressure: 230 psi at 68°F, 150 psi at 150°F
  • 3/8" maximum pressure: 150 psi at 68°F, 100 psi at 150°F
  • Max. temperature: 150°F
  • Meets FDA standards & NSF listed
Item # Description Catalog Pg. Price Add to Cart
5/16" John Guest® SuperSeal Tube OD x 5/16" Speedfit® Tube OD Gray Acetal Union Connector
Item 90425
3.28/Each
Save 5% when you buy 25+
Save 10% when you buy 50+
Save 15% when you buy 150+
P-236
3.28/Each
5/16" John Guest® SuperSeal Tube OD x 3/8" Speedfit® Tube OD Gray Acetal Union Connector
Item 90426
3.75/Each
Save 5% when you buy 25+
Save 10% when you buy 50+
Save 15% when you buy 150+
P-236
3.75/Each
3/8" John Guest® SuperSeal Tube OD x 5/16" Speedfit® Tube OD Gray Acetal Union Connector
Item 90427
3.75/Each
Save 5% when you buy 25+
Save 10% when you buy 50+
Save 15% when you buy 150+
P-236
3.75/Each
3/8" John Guest® SuperSeal Tube OD x 3/8" Speedfit® Tube OD Gray Acetal Union Connector
Item 90428
4.04/Each
Save 5% when you buy 25+
Save 10% when you buy 50+
Save 15% when you buy 150+
P-236
4.04/Each
3/8" John Guest® SuperSeal Tube OD x 1/2" Speedfit® Tube OD Gray Acetal Union Connector
Item 90429
5.04/Each
Save 5% when you buy 25+
Save 10% when you buy 50+
Save 15% when you buy 150+
P-236
5.04/Each
5/16" John Guest® SuperSeal Tube OD x 5/16" SuperSeal Tube OD Black Acetal Union Connector
Item 90430
6.02/Each
Save 5% when you buy 25+
Save 10% when you buy 50+
Save 15% when you buy 150+
P-236
6.02/Each