Hartzell HC-D2MV20-3 Series Owner's Manual And Logbook page 57

ALUMINUM BLADE MODEL IDENTIFICATION
Hartzell Propeller Inc.
propeller and blade assemblies. Example: HC-D2MV20-8/V8433N-6.
A slash mark separates the propeller and blade designations. The
propeller model designation is impression stamped on the propeller
hub. The blade designation is impression stamped on the blade butt
end (internal) and is either on a label or ink stamped on the blade
camber side (external).
prop model/MV8433N-6
DESCRIPTION AND OPERATION
Propeller Owner's Manual
uses a model designation to identify specific
Dash Number (or + number), diameter reduction (or increase) from basic design.
In this example, the nominal 84 inch diameter has been
reduced 6 inches = 78 inch dia. (with some exceptions)
there may be a letter following the dash number:
R - specifically rounded tip
S - square tip (Exception: blade model 8433NS was manufactured with a square
tip; however, the "S" square tip designator in the model number did not follow a
dash.)
T - specifically rounded tip
Q - Q-tip, factory 90 degree bent tip
A - slightly thinner & narrower tip fairing
E - elliptical tip
Suffix letters:
A - blade cuff modification or; 0 degree sweepback or;
for 8433 blades a 1 degree sweepback; or Y shank pitch knob
C - modified blade, dimensional or blade twist modification
from initial blade design
D - modified blade, blade twist, or thickness change
F - modified blade, dimensional modification (width/thickness)
H - hard alloy (7076)
N - shank modification (pilot tube hole), thickness added
S - Shot peen (Exception: Blade model M10474 was manufactured with a shot
peened surface; however, the "S" shot peen designator was not included in the
model number. The "S" designator must be added to M10476 blades at overhaul.)
blank - original design, no changes
The first 2 or 3 numbers indicate initial design
diameter (in inches), the last 2 numbers indicate
basic model or template (there are some exceptions
to this definition)
Prefix of up to 3 letters:
J - left hand rotation, tractor
L - left hand rotation, pusher
V, MV - shank design
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Rev. 2 Jun/12