Gibraltar PKG-377-G Lobed Knob 40mm 7-point Tpe M8x1.25

Product Description

The GIBRALTAR PKG-377-G is a 7-point lobed knob designed for tool-free manual adjustment on machinery, fixtures, and equipment assemblies. The knob features a 40 mm head diameter molded from thermoplastic elastomer (TPE), which provides a firm yet comfortable grip surface for repeated hand-tightening applications. The threaded stem is sized M8 x 1.25 with a 15 mm thread engagement length, and the overall assembled height is 25 mm. This style of knob is commonly installed by machine builders, maintenance technicians, and fabricators wherever a secure, finger-operated fastener is needed without a wrench.

This lobed knob is suited for light to medium-duty clamping and adjustment applications in industrial, commercial, and workshop settings. Typical installations include panel fastening, jig and fixture clamping, guard retention, and equipment access covers. The 7-lobe profile distributes hand-applied torque evenly across the grip surface, reducing fatigue during frequent adjustment cycles. The TPE material resists oils, mild solvents, and everyday shop contaminants, making it appropriate for general-purpose use in manufacturing and maintenance environments.

Key Features

• 7-point lobed profile for even grip and comfortable hand torque
• 40 mm head diameter provides a wide gripping surface for tool-free operation
• Thermoplastic elastomer (TPE) construction offers oil and solvent resistance
• M8 x 1.25 threaded stem with 15 mm thread length for standard metric fastener compatibility
• 25 mm overall height for low-profile installations
• Single-piece knob construction — no inserts or loose components

Compatibility

Designed as a standard metric replacement or upgrade knob for M8 x 1.25 threaded studs and bolts on industrial equipment, jigs, fixtures, and machinery panels.

Installation Notes

Installation does not require tools beyond confirming the mating thread is M8 x 1.25 and that the stud length does not exceed the 15 mm thread engagement depth of the knob. Verify the mounting stud or bolt is free of debris and corrosion before threading the knob on. Do not exceed hand-tight torque, as TPE knobs are not rated for wrench-applied loads. Confirm the knob seats flush against the mating surface to ensure secure retention.