What is the difference between the 9421LW1 and the 9421LW4 kits for the PowerPact M and P frame breakers?

Issue:
Characteristics of the 9421LW1 and the 9421LW4 kits for the PowerPact M and P frame breakers

Product Line:
Class 9421 Circuit Breaker Operational Mechanism, Powerpact M and P Frame

Environment:
Square D Operation Mechanisms

Resolution:
These kits consist of the following parts:
9421LW1 = 9421LW7 (opmech) + 9421LS8 (short shaft) + 9421LHP8 (handle)
9421LW4 = 9421LW7 (opmech) + 9421LS10 (long shaft) + 9421LHP8 (handle)

Item	Description
1	Operating mechanism
2	Handle assembly
3	Shaft
4	Shaft support bracket
5	Screw, #10-32 x 4-1/2
6	Screw, 1/4-20 x 1/2
7	Washer, 1/4
8	Screw, #8-32 x 3/8
9	Hex-head screw, 1/4-20 x 7/8
10	Lock washer, 1/4
11	Nut, 1/4-20
12	Hex-head screw, 1/4-20 x 1/2 (self-tapping)
13	Screw, 1/4-20 x 3/4 (self-tapping)
14	Handle gasket
A	Interlock pin location
B	Actuator
C	Circuit breaker
D	Enclosure door
E	Panel
H	Mounting depth
L	Shaft length

Released for:Schneider Electric USA