The Bostitch 651S5 is a heavy-duty pneumatic siding tacker engineered for rapid, reliable fastening of siding panels, sheathing and exterior insulated wall assemblies. It features an industrial-grade build and power-adjust control to ensure consistent staple clinch in demanding construction-environment applications.
Key Features
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Compatible with S5-series staples (16/17 gauge, 7⁄16″ crown) with leg lengths from 1″ up to 2″
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Industrial-grade magazine (capacity 170 staples) for high-volume use
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Over-moulded rubber grip to reduce operator fatigue on job-site
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Adjustable depth-of-drive and reduced tool height for improved access in tight spaces
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Anti-jam “breathable” magazine designed to minimise downtime
Specifications
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Staple Crown Width: 7⁄16″
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Staple Leg Length Range: 1″ – 2″
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Magazine Capacity: 170 staples
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Approximate Tool Weight: 4.5 lbs
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Typical Driving Power: 340 in-lb at 100 psi
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Suitable Operating Pressure: 70-120 psi
Why Choose This Tool?
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Ideal for exterior panel work, insulated sheathing, crate or pallet-type substrate fastening where speed and consistency matter
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Long leg-length range allows fastening through thicker substrates or multi-layer wall assemblies
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Durable construction and high capacity reduce downtime and support production-scale use on job sites
Things to Know Before Buying
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Requires a dependable, clean and regulated air supply—ensure compressors and hoses meet the pressure and flow needed for optimal performance
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Verify your staple inventory matches the S5-series 7⁄16″ crown and leg-length range of 1″–2″ for correct clinch strength
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Because of its robust build & capacity, this tool is optimized for professional job-site use; for lighter siding applications a smaller or lighter unit might suffice
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Operator ergonomics and job rotation still matter even with under-5 lb weight—frequent use warrants attention to comfort
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Maintenance—clean, lubricate and inspect regularly—ensures consistent performance and extends tool life
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