High-volume controlled flow — wide bead profile for large-area coverage, adhesives, sealants, and viscous fluids

Controlled expansion geometry — consistent uniform delivery from 1/8" inlet to 3/4" wide tip

Optimal industrial reach — tight spaces and complex assemblies in industrial and automotive applications

Seamless connection — all Semco® cartridge sizes, 1 oz through 1/10 gallon, secure leak-free attachment

The wide 3/4" orifice is designed for controlled material flow — making it suitable for a wide variety of materials including adhesives, sealants, and other viscous fluids. The 3/4" orifice is one of the widest in the Semco® nozzle series — delivering high-volume material throughput for large-area coverage, wide bead profiles, and high-flow industrial dispensing applications. The 1/8" x 3/4" controlled expansion flow path ensures consistent, uniform material delivery from inlet to tip — whether dispensing high-viscosity adhesives, thick sealants, or specialized viscous fluids. For finer application requirements, the Model #8646 is available in multiple orifice sizes.

The precision-molded 1/4" NPT male thread allows for seamless connection to the complete range of Semco® disposable cartridges — including 1, 2.5, 6, 8, 12, 20, 32 oz, and 1/10th gallon sizes. The standardized 1/4" NPT male thread ensures a secure, leak-free connection between nozzle and cartridge — delivering consistent, reliable high-volume material flow at every dispensing operation. The 1/4" NPT thread is the industry-standard connection for Semco® dispensing systems — ensuring maximum compatibility, secure attachment, and optimal performance across all compatible cartridge sizes and dispensing gun configurations.

At 4 inches in length, the Model #8646 provides optimal reach for tight spaces and complex assemblies — crucial in many industrial and automotive applications. The 4" length provides the ideal balance between reach and control — long enough to access confined areas and complex equipment setups while maintaining precise operator control over the wide 3/4" bead placement. Whether working in tight assembly joints, complex automotive components, or industrial equipment cavities, the 4" length ensures precise high-volume material placement. For different reach requirements, the Model #8646 is available in multiple lengths.

The Model #8646 is compatible with both pneumatic and manual dispensing guns — giving you the flexibility to choose the best dispensing method for your specific needs. Use with pneumatic dispensing guns for automated dispensing with speed and efficiency for high-volume applications, or with manual dispensing guns for detailed work allowing hands-on control and precision in every application. Pair with a pneumatic hose for extended reach capability — making it easier to access hard-to-reach areas during high-volume dispensing operations.

Complete your dispensing system with Semco® cartridges — high-quality cartridges specifically designed for optimal performance, compatible across the full range from 1 oz through 1/10 gallon. Protect your dispensing system and maintain cleanliness with reliable end caps that prevent contamination. Ensure airtight seals to preserve the integrity of your materials and enhance shelf life with Semco® cap seals. The complete Semco® dispensing system delivers consistent, reliable performance — ensuring your projects are completed successfully and efficiently.

The disposable design ensures single-use application integrity — eliminating cross-contamination between materials and maintaining consistent dispensing performance across every application. Simply remove and replace for each new application — no cleaning, no residual material buildup, no compromised flow geometry from prior use. The disposable format is the preferred choice for critical industrial, automotive, and aerospace dispensing operations where material purity and application consistency are non-negotiable.

1/4" NPT male thread — seamlessly connects to any compatible Semco® cartridge, 1 oz through 1/10 gallon

4" optimal length — access tight spaces and complex assemblies in industrial and automotive applications

3/4" wide orifice delivers high-volume controlled flow — wide bead for adhesives, sealants, and viscous fluids

Disposable design — remove and replace for next application, preventing cross-contamination between materials

High-volume controlled flow — wide bead profile for large-area coverage, adhesives, sealants, and viscous fluids

Robust industry-standard thread — seamless, secure, leak-free connection to all Semco® cartridge sizes

Optimal industrial reach — tight spaces and complex assemblies in industrial and automotive applications

Maximum workflow flexibility — pneumatic for high-volume speed, manual for hands-on control and precision