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Murray KEYSTONE pinch clamps offer
superior strength. KEYSTONE clamps
are 100% stainless steel.
Keystone Pinch Clamps have a welded
construction, are quick and easy to install
and provide a uniform, tamper proof seal.
Keystone Pinch Clamps are widely used on
both soft hose and rigid plastic pipe. You
will find these clamps anywhere you
SAE Type “J”
KEYSTONE PINCH CLAMPS
connect poly pipe. Keystone Pinch Clamps
are excellent for use in a multitude of
applications such as irrigation, water
supply systems, fuel and vapor lines, dust
shields and air filter attachments, car wash
supply lines and for securing bundles of
cable. When crimping with a hand tool,
Murray’s true Keystone geometry, located
in the ear area, dramatically reduces
miscrimps. Keystone Pinch clamps are
100% Stainless Steel.
How to Determine Proper Clamp Size:
Measure actual outside diameter of hose
on fitting, or overall outside diameter of
items to be clamped together. Select a
clamp size whose clamping range includes
this outside diameter.
Other sizes available upon request. Available in packed
and bulk stock. Other packaging configurations available.
Keystone Pinch Clamp Packaging:
All sizes are available bulk packaged
in corrugated cartons. Keystone Pinch
clamps for irrigation applications are
standard packed in polybags, in the
following counts:
Part
Pieces/ Pieces/Master
Number
Bag
Carton
KS 319800P10
10
1000
KS 319800P100
100
2500
KS 321000P10
10
1000
KS 321000P100
100
2500
KS 325600P10
10
1000
KS 325600P100
100
2500
KS 327 100P10
10
1000
KS 327100P100
100
2500
KS 331600P10
10
1000
KS 331600P100
100
2500
KS 333100P10
10
1000
KS 333100P100
100
2500
KS 334600P100
100
2500
KS 341000P100
100
2000
KS 342500P100
100
2000
KS 348500P100
100
2000
*Popular irrigation sizes are available for immediate
shipment packaged in poly bags. Please inquire on
availability of other packaging configurations and lead
time for other sizes. Other sizes, shapes and materials
are available upon request, subject to minimum
order quantities.
Slip the Murray pinch clamp over the hose and insert
the fitting.
Position the clamp over the fittings barbs.
Use a Murray pinch tool (A2000, A2005 or A2100) to
firmly squeeze the clamp’s ear. Once installed, the
sides of the ear clamp should almost touch. A slight
gap is indicative of proper fit.
To achieve proper attachment of Murray pinch clamps
it is important to select the correct size clamp for the
job at hand.
If both sides of the ear on the clamp touch, it is too
large for the application and the next smaller size
should be used.
If the clamp breaks during installation, it indicates
the clamp is too small and the next size larger clamp
should be used.
Murray pinch clamps offer a safe, easy and tamper
proof method of securing hose of many types to a
wide variety of fittings.
INSTALLATION OF MURRAY
KEYSTONE PINCH AND KEYSTONE
SEAMLESS PINCH CLAMPS:
To Apply:
Position clamp on hose.
Part
Number
Metric
Decimals
Open Closed Open Closed
KS 3101
10.1
8.5 .400 .335
KS 3108 10.8 9.1
.425 .360
KS 3113 11.3 9.7 .445 .380
KS 3119 11.9 10.0 .470 .395
KS 3128 12.8 10.9 .505 .430
KS 3133 13.3 11.4 .525 .450
KS 3140 14.0 12.1
.550 .475
KS 3150 15.0 12.5 .590 .490
KS 3157 15.7 13.2 .620 .520
KS 3161
16.1
13.6 .635 .535
KS 3165 16.5 14.0 .650 .550
KS 3173 17.3 14.7 .680 .580
KS 3178 17.8 15.2 .700 .600
KS 3185 18.5 16.0 .730 .630
KS 3190 19.0 16.5 .750 .650
KS 3198* 19.8 16.6 .780 .655
KS 3210* 21.0 17.9 .830 .705
KS 3222 22.2 19.1
.875 .750
KS 3236 23.6 20.5 .930 .805
KS 3248 24.8 21.7 .975 .855
KS 3256* 25.6 22.5 1.010 .885
KS 3260 26.0 22.9 1.025 .900
KS 3271* 27.1
24.0 1.070 .945
KS 3286 28.6 25.5 1.125 1.005
KS 3301
30.1
27.0 1.185 1.060
KS 3216* 31.6 28.5 1.245 1.120
KS 3324 32.4 29.3 1.275 1.155
KS 3331* 33.1
30.0 1.300 1.180
KS 3346* 34.6 31.5 1.360 1.240
KS 3364 36.4 33.3 1.435 1.310
KS 3396 39.6 36.5 1.560 1.440
KS 3410* 41.0 37.9 1.615 1.490
KS 3425* 42.5 39.4 1.675 1.550
KS 3445 44.5 41.4 1.750 1.630
KS 3460 46.0 42.9 1.810 1.690
KS 3476 47.6 44.5 1.875 1.750
KS 3485* 48.5 45.5 1.910 1.787
KS 3508 50.8 47.7 2.000 1.880
Give ear a firm squeeze
with your pincers.
Where access to ear
is difficult, use Side Jaw
Pincers.
“A” Diameter Range