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Introduction to Stainless Steel Weld Fittings

Key High's Butt Weld Fittings are manufactured using 304L stainless steel tubing and are typically used in exhaust lines and forelines. Key High's Stainless Steel Weld Fittings are fabricated from sanitary tubing, which is glass beaded to a smooth satin finish.

All crosses and tees in this catalog are fabricated using the pulled port technique. This method allows for full penetration fusion TIG welds. The pulled port method eliminates entrapment areas and assures rapid pump downs. This is the most desirable method for fabricating high and ultra-high vacuum weldments.

All fittings are easily welded using the TIG (tungsten inert gas) weld process. All Key High Butt Weld Fittings are clean, packaged, and ready for immediate use. All welds are leak tested on a helium mass spectrometer at 5 x 10-10 std cc/sec and display no measurable leak. Upon request, Key High can supply fittings fabricated from 316l, and we offer electropolished fittings. Contact us for your requirements. 


Product information is subject to change without notice. Product images may include options or accessories not included with the base model.


Precision Welded. Performance Proven.
For 50 years, Key High Vacuum Products, Inc. has been a trusted leader in precision-engineered stainless steel high vacuum weldments. With tens of thousands of unique weldments in use—from particle accelerators to industrial leak detectors—our expertise is proven across industries. Rooted in innovation, craftsmanship, and an unwavering commitment to customer satisfaction, we deliver high-quality, customized solutions that drive success. Every day, our team brings a unique blend of passion and precision, ensuring your goals are met with excellence—because your mission matters. Experience the Key High difference.
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Key High Vacuum Products, Inc.
36 Southern Boulevard, Nesconset, NY 11767
1-631-360-3970
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