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S4320
  • Heavy duty stamped latch interlocks with the hook tip.
  • High cycle, long life spring.
  • Can be made into a "Positive Locking" Hook when proper cotter pin is utilized.
  • Latch kits shipped unassembled and individually packaged with instruction.
 

 

 

S4320Drawing

S-4320 Replacement Latch Kit
for New 319N, and 320N, 322N and 339N Hooks.

Hook Size
(t)
Hook
ID
Code
S-4320
Stock No.
SS-4320
Stock No.*
Weight
Each
Dimensions
(in.)
Carbon
Alloy
Bronze
B
D
 E
3/4
1
.5
D
1096325
1097100
.03
.50
.15
1.44
1
1-1/2
.6
F
1096374
1097109
.04
.54
.17
1.56
1-1/2
2
1
G
1096421
1097118
.04
.63
.17
1.66
2
3
1.4
H
1096468
1097127
.06
.66
.17
1.91
3
5
2
I
1096515
1097136
.10
.83
.20
2.31
5
7
3.5
J
1096562
1097145
.15
1.04
.20
3.44
7-1/2
11
5
K
1096609
1097154
.28
1.25
.27
3.56
10
15
6.5
L
1096657
1097163
.33
1.35
.27
3.81
15
22
10
N
1096704
1097172
.84
1.66
.39
5.18
SS-4320 is Stainless Steel construction with cad plated steel nuts.

 

S-4320 HOOK LATCH KIT

(For Crosby 319N, 320N, 322N, 1320, 339N & 1339 Hooks)

WARNINGS AND APPLICATION
INSTRUCTIONS

 Important Safety Information
Read & Follow

  • latch.jpg (7540 bytes)
    Always inspect hook and latch before using.
  • Never use a latch that is distorted or bent.
  • Always make sure spring will force the latch against the tip of the hook.
  • Always make sure hook supports the load. The latch must never support the load. (See Figure 1 & 2.)
  • When placing two (2) sling legs in hook, make sure the angle between the legs is less than 90 and if the hook or load is tilted, nothing bears against the bottom of this latch.  (See Figure 3 & 4.)
  • Latches are intended to retain loose sling or devices under slack conditions.
  • Latches are not  intended to be an anti-fouling device.
  • When using latch for personnel lifting, select proper cotter pin (See Figure 5). See Figure 7 below for proper installation instructions.
  • Never reuse a bent cotter pin.
  • Never use a cotter pin with a smaller diameter or different length than recommended in Figure 5.
  • Never use a nail, a welding rod, wire, etc., in place of recommended cotter pin.
  • Always ensure cotter is bent so as not to interfere with sling operation.
  • Periodically inspect cotter pin for corrosion and general adequacy.
  • Loads may disengage from hook if proper procedures are not followed.
  • A falling load may cause serious injury or death.
  • Hook must always support the load.  The load must never be supported by the latch.
  • See OSHA Rule 1926.550 (g) for personnel hoisting by crane or Derricks.  A Crosby S-319N, S-320N, S-322N, S-1320, A-339 and A-1339 Hook with an S-4320 latch attached (When secured with cotter pin) may be used for lifting personnel.
  • An S-4320 Latch is only to be used with a Crosby S-319N, S-320N, S-322N, S-1320, A-339, A-1339 Hook.
  • DO NOT use this latch in applications requiring non-sparkling.
1 2 3 4
Right Wrong Right Wrong
Figure 1 Figure 2  Figure 3  Figure 4
Hook
Identification
Code
Recommended
Cotter Pin Dimensions
(in.)
Carbon Alloy Diameter Length
DC DA 1/8 3/4
FC FA 1/8 3/4
GC GA 1/8 1
HC HA 3/16 1-1/4
IC IA 1/4 1-1/2
JC JA 5/16 2
KC KA 5/16 2
LC LA 3/8 3
NC NA 3/8 3
The current SS-4055 latch kit and the PL latch will not fit new S320N hook.  They will continue to be offered in both styles to service existing hooks. Important - The new S4320 latch kit will not fit the old 320 and 319 hooks.

Figure 5
* See Crosby General Catalog for specific Working Load Limits.