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Product ID : SR28
SR28 Flat SS Washers, pkg of 100, Size=1/4-28 Flat
Description
More details on associated web page:
Flange Hardware - Flat Stainless Steel Washers
Made in SS - washers are used in the assembly of vacuum systems.

made with Stainless steel

Screws, Nuts, Washers

Butt weld, can be used with orbital welders, and has thru holes.

Inland rough pump oil is ideal for use in all models of vacuum pumps including Adixen, Edwards, and Welch.

Made in SS - washers are used in the assembly of vacuum systems.

The below listed vacuum flange copper gaskets are made from OFHC copper.

The following copper and gold plated copper gaskets are available
for the vacuum flanges on Thermo/Finnigan mass spectrometers.

Copper used.

All gaskets are .080" thick.