Vacuum Flanges

Blank Vacuum Flanges

These blank non-rotatable flanges are for sealing off ports, for drilling custom interfaces, feedthrus, or other accessories, and for modifications of vacuum equipment. These reliable, knife-edge flanges are the vacuum industry standard for ultra-high vacuum applications. They utilize flat OFHC copper gaskets for vacuum sealing below 10^-13 torr at temperature ranges from -196 degrees C to 500 degrees C. Manufactured from Type 304 stainless steel, all flanges will perfectly mate to other Conflat flanges of the same O.D.

Other flange types and sizes are available on request. Custom drilling, modifications, welding and fabrication are also available from our machine shop. Call SIS with your requirements or send drawings for a quotation.

Accessory Supplies

Blank Non-Tapped Flanges

Part No.	OD (in)	Thickness (in)	# Bolts	Bolt Diameter (in)	Bolt Cir Diameter (in)	Cu Gask	est wt.	Quantity In Stock	Price	Quantity to order
Blank Non-Tapped Flange, UOM=EA
133X000	1.33	0.28	6	0.172	0.060	CG-300	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$12.00
212X000	2.12	0.470	4	0.265	1.625	CG-400	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$19.50
275X000	2.73	0.500	6	0.265	2.132	CG-500	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$24.00
338X000	3.37	0.625	8	0.332	2.850	CG-700	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
450X000	4.47	0.680	8	0.332	3.628	CG-1000	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$47.50
462X000	4.62	0.750	10	0.332	4.030	CG-1200	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
600X000	5.97	0.780	16	0.332	5.128	CG-1500	2	1	$65.00
675X000	6.75	0.840	18	0.332	5.969	CG-1800	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$110.00
[*L] Standard lead-time for out-of-stock items is approximately two weeks depending on the item. (#) Call for availability.
Ordering information. International (non-US) prices available through your local dealer.

Blank Tapped Flanges

Part No.	OD (in)	Thickness (in)	# Bolts	Bolt Diameter (in)	Bolt Cir Diameter (in)	Cu Gask	Bolts	est wt.	Quantity In Stock	Price	Quantity to order
Blank Tapped Flanges, UOM=EA
133X000T	1.33	0.28	6	0.172	1.060	CG-300	#8-32	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
212X000T	2.12	0.470	4	0.265	1.625	CG-400	1/4-28	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
275X000T	2.73	0.500	6	0.265	2.312	CG-500	1/4-28	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$20.00
338X000T	3.37	0.625	8	0.332	2.850	CG-700	5/16-24	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
450X000T	4.47	0.680	8	0.332	3.628	CG-1000	5/16-24	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
462X000T	4.62	0.750	10	0.332	4.030	CG-1200	5/16-24	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
600X000T	5.97	0.780	16	0.332	5.128	CG-1500	5/16-24	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
675X000T	6.75	0.840	18	0.332	5.969	CG-1800	5/16-24	2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	---	---
[*L] Standard lead-time for out-of-stock items is approximately two weeks depending on the item. (#) Call for availability.
Ordering information. International (non-US) prices available through your local dealer.

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