CLOSE COUPLER
Multi-CF TM FITTING

BOLT-REVERSING 8 CF, 6 CF, 4½ CF, 2¾ CF, AND 11/3 CF UHV COUPLERS
JOIN TWO TAPPED-HOLE COMPONENTS CLOSE TOGETHERAPPLICATIONS:APPLICATIONS:JOINING TWOCOMPONENTS WITHMINIMAL LENGTHATTACHINGVALVES, PUMPS,
FEEDTHROUGHS, ETC.
TO UHV CHAMBERS,KEEPING OVERALLSIZE TO A MINIMUM

11/3 CF, 2¾ CF, and 4½ CF non- rotatable close couplers

FEATURES / OPTIONS:THE CLOSE COUPLER
Close Couplers are two-port Multi-CF Fittings, consisting of machined thick-wallcylinders, with opposing same-sized CF sealing surfaces (11/3, 2¾, or 4½ for thenon-rotatable couplers). The Close Coupler minimizes overall length in joining twotapped-hole components, resulting in the shortest possible distance between them.
Under the bolt heads, flange thickness has been decreased, while adequate rigidity
has been maintained through the use of an appropriately machined thick-wallcylinder. Each 2¾ CF or larger sealing surface has at least one pair of GrabberGrooves. Care is needed to use the correct bolt lengths. Note that opposing bolt
sets are offset one from the other by one half of the angular bolt spacing.
Rotatable close couplers are available in 2¾ CF, 4½ CF, 6 CF and 8 CF sizes forincreased flexibility.

11/3 Multi-CF
Close Coupler
MCF133-CC2-700

THREE LENGTHS AVAILABLE FOR THE 2¾ MCF
0.700, 1.000, 1.400 INCHROTATABLE STYLES IN 2¾ , 4½, 6 AND 8 CF SIZESEACH 2¾, 4½, 6 AND 8 CF SEALING SURFACE HAS
ONE PAIR OR TRIPLET OF GRABBER GROOVES
THE 11/3 CF USES
SOCKET HEAD 8-32 x 1/4 BOLTS
THE 2¾ CF USES
12-POINT-HEAD 1/4-28 x 1/2 SHORT BOLTS OR
12-POINT-HEAD 1/4-28 x 7/8 STANDARD BOLTS
THE 4½ CF, 6 CF AND 8 CF USE
12-POINT-HEAD 5/16-24 x 3/4 STANDARD BOLTS
UNITARY STAINLESS STEEL 316L CONSTRUCTION
MCF133-CC2-700

MCF133-CC2-700

Multi-CF FITTINGCOMMON APPLICATIONCONSTRUCTION / MATERIAL
11/3 CF SEALING SURFACESLENGTH, GASKET PLANE TO
GASKET PLANE
BOLT TYPE

Non-rotatable Close Coupler
Bolt Reversing Coupler
Unitary Stainless Steel 316L
Two with (6) 8-32 x 1/4 clear bolt holes
0.700 inch
Socket head 8-32 x 1/4 bolts

ALL DIMENSIONS ARE IN INCHES(MILLIMETERS IN PARENTHESES)

5 - 14

CAUTIONS:(1) SILVER PLATED BOLTS OR
EQUIVALENT LUBRICATIONMUST BE USED
(2) USE CORRECT BOLT LENGTH

Specifications Subject to Change Without Notice.

ELECTRON GUNSCLOSE COUPLERION GUNS

2¾ Multi-CF
Close Couplers:
MCF275-CC200-700
MCF275-CC200-1400

THE 2¾ Multi-CF CLOSE COUPLER
The MCF275 Close Couplers are two-port Multi-CF Fittings,
consisting of machined thick-wall cylinders, with opposing
2¾ CF sealing surfaces. The two non-rotatable CloseCouplers differ in their length as indicated at the end of thepart number: the MCF275-CC200-700 being 0.700 inch,
and the MCF275-CC200-1400 being 1.400 inch in length.

MCF275-CC200-700
Multi-CF FITTINGCOMMON APPLICATIONCONSTRUCTION / MATERIAL
2¾ CF SEALING SURFACESLENGTH, GASKET PLANE TO
GASKET PLANE
BOLT TYPEEMITTERS

2¾ CF Close Couplers MCF 275-CC200, various lengths

MCF275-CC200-1400

Non-rotatable Close Coupler
Bolt Reversing Coupler
Unitary Stainless Steel 316L
Two with (6) 1/4-28 clear bolt holes,
Two with (6) 1/4-28 clear bolt holes,
plus one pair of Grabber Grooves perplus one triplet of Grabber Grooves per
sealing surface
sealing surface
0.700 inch
1.400 inch
12-point-head 1/4-28x1/2 short bolts

12-point-head 1/4-28x7/8 short bolts

ALL DIMENSIONS ARE IN INCHES(MILLIMETERS IN PARENTHESES)CAUTIONS:(1) SILVER PLATED BOLTS OR
EQUIVALENT LUBRICATIONMUST BE USED
(2) USE CORRECT BOLT LENGTH

Toll Free: 1 888 KIM-PHYS (1 888 546-7497) e-mail: info@kimphys.com
Tel. 1 603 878-1616 Fax: 1 603 878-3700

5 - 15INDEX / INFORMATIONCOMPONENTS

DETECTORSMCF275-CC200-1400

CLOSE COUPLER

4½ Multi-CF Close Coupler:
MCF450-CC20000-1400

MCF450-CC20000-1400
Multi-CF FITTINGCOMMON APPLICATIONCONSTRUCTION / MATERIAL
4½ CF SEALING SURFACESLENGTH, GASKET PLANE TO
GASKET PLANE
BOLT TYPE

Close Coupler MCF450CC-20000-1400

Non-rotatable Close Coupler
Bolt Reversing Coupler
Unitary Stainless Steel 316L
Two with (8) 5/16-24 clear bolt holes,plus one triplet of Grabber Grooves
per sealing surface
1.400 inch
12-point-head 5/16-24 x 3/4 bolts

ALL DIMENSIONS ARE IN INCHES(MILLIMETERS IN PARENTHESES)CAUTIONS:(1) SILVER PLATED BOLTS OR
EQUIVALENT LUBRICATIONMUST BE USED
(2) USE CORRECT BOLT LENGTH

5 - 16Specifications Subject to Change Without Notice.