This if from the Mcmaster Carr catalog

Wide-Band Self-Tightening Spring Hose and Tube Clamps
     The coverage of a wide band reduces leaks while spring

action

automatically compensates for hose and tube expansion and

contraction. Clamps

are reusable.
     Made of carbon steel with a black zinc-rich plating that has

five times

the corrosion resistance of standard zinc plating. To install,

use

wide band

pliers (sold separately) to open clamp ends. Next, slide clamp

onto

hose and

over the installed hose fitting. Finally, release pliers to

secure

clamp to

hose. Temperature range is -100° to +400° F. Meet SAE J1508.
     Note: When choosing a clamp, measure the outside diameter of

your hose

with the fitting installed.  For  Band  Band  Pkg.
Hose OD  Width  Thick.  Qty.  Per Pkg.

 5/8"  37/64" 0.039" 10  7329K11  $3.11

 21/32"  37/64" 0.033" 10  7329K12  2.66

 3/4"  37/64" 0.051" 10  7329K13  4.42

 25/32"  37/64" 0.051" 10  7329K14  4.46

 15/16"  37/64" 0.051" 10  7329K15  4.86

1 1/16"  37/64" 0.063" 10  7329K16  5.98

1 21/32"  37/64" 0.075" 10  7329K17  8.95

1 31/32"  37/64" 0.079" 10  7329K18  10.86

Wide-Band Hose Clamp Pliers   7329K21    Each   $29.49

Bulent Aliev wrote:

Hi Paul, they are on Page 215

I think I'll pass on those. They don't look robust or secure enough.
I see no advantage over the constant torque style.

Paul Lamar

What? Those clamps were installed by the Datsun factory on my 1972 240Z
radiator hoses!
[Marc Wiese]

So what? :) 

Paul Lamar
 
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