Overview

The All VAC LJ45AM3816T58L is a professional-grade 4-1/2" (11cm) diameter concave rubber vacuum suction cup with a 40 lb (18kg) load capacity. Featuring a silver aluminum mount with a 3/8-16 threaded stud (5/8" length), this vacuum cup provides a reliable, temporary mounting solution without drilling holes. The concave design makes it particularly effective on both flat and curved smooth, nonporous surfaces.

Key Features

• 40 lb Load Capacity: Safely supports up to 40 lbs (18kg) of equipment or materials on properly prepared surfaces
• Red-Line Vacuum Indicator: Visual warning system alerts users to any significant vacuum loss before failure occurs
• Check Valve System: Allows re-pumping to restore suction without losing remaining vacuum, extending hold time
• Quick-Release Lift Tabs: Pad edge tabs enable instant, controlled release when you need to remove the cup
• Concave Design: Optimized for curved surfaces while maintaining excellent performance on flat surfaces
• 3/8-16 Threaded Stud: Standard camera mount thread with 5/8" length stud for versatile equipment attachment

Applications

• Camera and Video Equipment: Vehicle camera rigs, windshield mounts, and action camera positioning on curved surfaces
• Glass Handling: Window installation, mirror positioning, and glass panel manipulation
• Sign Installation: Temporary mounting of graphics and signage on smooth surfaces
• Surveying Equipment: Mounting laser levels, targets, and measurement devices on vehicles or structures
• Automotive Work: Trim removal, dent pulling preparation, and temporary tool mounting
• Stone and Countertop Handling: Moving and positioning polished stone slabs and countertops
• Solar Panel Installation: Handling and positioning solar panels during installation
• Light Material Lifting: General industrial and workshop material handling tasks

Specifications

• Diameter: 4-1/2" (11cm)
• Load Capacity: 40 lbs (18kg)
• Cup Shape: Concave rubber
• Mount Material: Silver aluminum
• Thread Size: 3/8-16
• Stud Length: 5/8"
• Surface Compatibility: Smooth, nonporous surfaces (flat or curved)
• Safety Features: Red-line vacuum loss indicator, check valve, lift tab quick release

Frequently Asked Questions

Q: Can I use this vacuum cup on curved surfaces like car windshields?

A: Yes, this concave vacuum cup is specifically designed to attach to both flat and curved smooth, nonporous surfaces, making it ideal for vehicle camera mounts and similar applications.

Q: What is the maximum weight this vacuum cup can safely support?

A: This vacuum cup has a load capacity of 40 lbs (18kg) when properly attached to a smooth, nonporous surface.

Q: How do I know if the vacuum seal is losing suction?

A: The vacuum cup features a red-line indicator that warns you of any significant vacuum loss, allowing you to re-pump before failure occurs.

Q: Can I re-pump the vacuum cup without removing it?

A: Yes, the integrated check valve allows you to re-pump the cup to restore suction without losing the remaining vacuum, maintaining your mount.

Q: What thread size is the mounting stud?

A: This model features a 3/8-16 thread with a 5/8" length stud, compatible with most camera equipment and mounting accessories. Other stud lengths and threads are available for different applications.

Q: How do I quickly release the vacuum cup?

A: The vacuum cup has lift tabs on the pad edges that permit instant release when you need to remove it from the surface.

Q: What types of surfaces will this vacuum cup work on?

A: This vacuum cup attaches to smooth, nonporous surfaces such as glass, polished stone, metal, and glossy plastics, whether flat or curved.