Designed for upholstery and fine-wire fastening applications, the Bostitch 21684B brings professional performance in a lightweight pneumatic form. It features rugged all-metal construction, whisper-quiet operation and low air consumption — ideal for frequent use on frames, fabrics or furnishings.
Key Features
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Accepts “84 series” or SBNK-series fine-wire staples with a crown width of ½″ and leg lengths from about 5⁄32″ up to 9⁄16″.
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Lightweight body (approximately 1.8 lbs) for less fatigue during extended use.
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Quiet, low-air-consumption design suitable for production or shop environments.
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Fast bottom-loading magazine (capacity approx. 156 staples) for minimal interruption.
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Built to secure fabric, webbing, cardboard or other materials to wood frames — used in upholstery, boat seating or commercial furniture applications.
Specifications
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Tool Weight: 1.8 lbs
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Crown Width: ½″
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Staple Leg Length Range: 5⁄32″ – 9⁄16″
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Magazine Capacity: 156 staples
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Construction: All-metal body; pneumatic operation
Why Choose This Tool?
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Excellent choice where both strength and finish matter — ideal for upholstery, furniture frames, marine seating or specialty fixtures.
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Lightweight and efficient — less operator fatigue, fewer reloads, smoother workflow.
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Durable professional build meant for repeated use rather than occasional light tasks.
Things to Know Before Buying
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Requires a clean, properly regulated compressed-air supply — ensure your system supports it for best performance.
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Confirm your staple inventory matches the 84 series/SBNK-series spec and the leg length range suits your material stack-up.
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Although lightweight for a pneumatic tacker, frequent use still warrants good ergonomics and operator variation to avoid fatigue.
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If your materials exceed the 9⁄16″ leg length or require a wider crown staple, verify that this model is suitable — you may need a different tool for heavier-duty stacks.
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Routine maintenance — keeping the air supply dry, lubricated and properly filtered — will help sustain performance and tool lifespan.
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