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Difficulty: MediumGripping and Holding Tools

Slip-joint pliers are designed with serrated gripping jaws to safely apply final tightening torque to precision hex-head bolts without rounding the fastener corners.

Answer: Answer

Answer

False
The statement is false because slip-joint pliers are general-purpose gripping tools, not fastener drivers. When rotational force is applied with pliers, the serrated teeth bite into the fragile corners of the hex head instead of contacting the flat flats. This concentrates pressure on small contact points and slips, rounding off the bolt head. Proper box-end wrenches, open-end wrenches, or sockets must always be used for tightening hex-head fasteners.

Step-by-Step Solution

1
Examine the intended mechanical function and jaw profile of slip-joint pliers.
Slip-joint pliers possess serrated, adjustable jaws designed for general gripping, bending, and holding of flat or cylindrical workpieces, rather than precision torque transfer.
Gripping tools lack fixed, parallel flat dimensions matched to standardized fastener sizes.
2
Analyze the contact dynamics between serrated plier jaws and a hexagonal fastener head under rotational load.
The plier jaws make point contact only on opposite apexes (corners) of the hex head, concentrating mechanical stress and causing the teeth to slip and deform the corners.
Applying torque to hex fasteners requires even force distribution across the flat faces using dedicated wrenches or sockets.
3
Determine the truth value of the statement.
The statement is False.
Using slip-joint pliers for final torque on hex bolts violates standard shop practices and damages the fastener.

Key Concept

Proper tool selection and fastener damage prevention with gripping tools versus drive wrenches
Estimated Time:45s
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Topics

Gripping and Holding Tools

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