Lufkin 590GMEN Brass Plumb Bob 20 Oz 6 Inch

Product Description

The LUFKIN 590GMEN is a solid brass plumb bob designed for establishing true vertical reference lines on construction, layout, and alignment tasks. Weighing 20 ounces and measuring 6 inches in length, this bob provides the mass and balance needed for accurate plumb transfer in both indoor and outdoor conditions. The body and point are machined from brass, offering corrosion resistance and long service life under job-site conditions. The tip is fixed and non-replaceable, making this a straightforward tool suited for general layout work where a precision, low-maintenance bob is required. Carpenters, plumbers, electricians, masons, and surveyors commonly use plumb bobs of this weight class for foundation layout, column alignment, and conduit or pipe drop verification.

The 590GMEN is suited for residential and commercial construction applications where a heavy, stable bob is preferred. The 20-ounce weight helps dampen swing in drafty or outdoor environments, making it practical for framing layout, staircase alignment, and overhead anchor point location. Plumbers and pipefitters use bobs of this type to verify vertical drop for drain stacks and vent penetrations. Electricians reference them for panel alignment and conduit runs requiring a confirmed plumb line.

Key Features

• Solid brass body and point construction for corrosion resistance and durability
• 20-ounce weight provides stable, low-swing plumb reference in field conditions
• 6-inch body length with 1/8-inch diameter for precise point placement
• Fixed brass tip — no replaceable-tip complexity, minimal maintenance
• Single-unit packaging suitable for individual tool purchase or job-site restocking

Compatibility

Designed as a general-purpose plumb bob compatible with standard plumb bob string, chalk line cord, or braided mason line commonly used in construction and trade layout applications.

Installation Notes

Plumb bobs are hand tools requiring no power source or mechanical installation. Attach the bob securely to a plumb line using the threaded or recessed top fitting before use. When suspending from an overhead point, allow the bob to fully stop swinging before marking the reference point below. Store the bob and line separately to prevent tangling and protect the brass tip from impact damage.