Crosby Shur-Loc Hook

WARNING AND APPLICATION INSTRUCTIONS

S-316A

S-317A

S-318A

S-326A

Important Safety Information - Read and Follow

• A visual periodic inspection for cracks, nicks, wear, gouges and deformation as part of a comprehensive documented inspection program, should be conducted by trained personnel in compliance with the schedule in ANSI B30.10.
• For hooks used in frequent load cycles or pulsating load, the hook and threads should be periodically inspected by Magnetic Particle or Dye Penetrant. (Note: Some disassembly may be required.)
• Never use a hook whose throat opening has been increased, or whose tip has been bent or twisted.
• Never use a hook that is worn beyond the limits shown in Figure 1.
• Remove from service any hook with a crack, nick, or gouge. Hooks with a crack, nick, or gouge shall be repaired by grinding lengthwise, following the contour of the hook, provided that the reduced dimension is within the limits shown in Figure 1.
• Never repair, alter , rework, or reshape a hook by welding, heating, burning, or bending.
• Never side load, back load, or tip load a hook. (See Figure 2.)
• Efficiency of synthetic sling material may be reduced when used in eye or bowl of hook.
• Always make sure the hook supports the laod. (See Figure 3).
• Do not use hook tip for lifting (See Figure 4).
• When placing two (2) sling legs in hook, make sure the angle from vertical to the leg nearest the hook tip is not greater than 45 degrees, and the included angle between the legs does not exceed 90 degrees* (See Figure 5)
• See ANSI/ASME B30.10 "Hooks" for additional information.

* For angles greater than 90 degrees, or more than two (2) legs, a master link or bolt type anchor shackle should be used to attach the legs of the sling to the hook.

Figure 1

ZONE A: 10% OF ORIGINAL DIMENSION ZONE B: 5 % OF ORIGINAL DIMENSION ZONE C: SEE MINIMUM THREAD SIZE CHART

Figure 2
Side Load Wrong	Back Load Wrong	Tip Load Wrong

Figure 3	Figure 4	Figure 5
Right	Wrong

WARNING

Loads may disengage from hook if proper procedures are not followed. A falling load can seriously injury or kill. Never use hook unless hook and latch are fully closed and locked. Keep body parts clear of pinch point between hook tip and hook latch when closing. Do not use hook tip for lifting. Shank threads may corrode and/or strip and drop the load. Never apply more force than the hook's assigned Working Load Limit (WLL) rating. See OSHA Rule 1926.550 (g) for personnel hoisting by cranes or derricks. A Crosby 316, 317, 318, or 326 hook may be used for lifting personnel. Use only genuine Crosby parts as replacement. Read and understand these instructions before using hook.

Important
Basic Machining and Thread Information
Read and Follow

• Wrong thread and/or shank size can cause stripping and loss of load.
• The maximum diameter is the largest diameter, after cleanup, that could be expected after allowing for straightness, pits, etc.
• All threads must be Class 2 or better.
• The minimum thread length engaged in the nut should not be less than one (1) thread diameter.
• Hook shanks are not intended to be swaged on wire rope or rod.
• Hook shanks are not intended to be drilled and internally threaded.
• Crosby cannot assume responsibility for, (A) the quality of machining, (B) the type of application, or (C) the means of attachment to the power source or load.
• Consult the Crosby Hook Identification & Working Load Limit Chart (See below) for the minimum thread size for assigned Working Load Limits (WLL). §
• Remove for service any Hook which has threads corroded more than 20% of the nut engaged length.

Crosby Hook Identification & Working Load Limit Chart^§

* Ultimate Load is 5 times the Working Load Limit based on XIP Wire Rope.
** Ultimate Load is 4 times the Working Load Limit based on Grade 8 Chain.
§ Working Load Limit - The maximum mass or force which the product is authorized to support in general service when the pull is applied in-line, unless noted otherwise, with respect to the centerline of the product. This term is used interchangeably with the following terms:
1. WLL, 2. Rated Load Value, 3. SWL, 4. Safe Working Load, 5. Resultant Safe Working Load.