The Arrow JT21-516 staples are heavy-wire plier staples designed for medium-duty to heavy-duty stapling jobs where stronger hold and deeper penetration are needed than standard staples provide. With a 5/16" leg length and a 7/16" crown width, these staples are ideal for stapling thicker cardboard, corrugated boxes, insulation backing, sheathing, light wood panels, packaging materials, and assorted general-purpose fastening tasks.
Manufactured from strong steel wire, JT21-516 staples resist bending and bending-related misfires, delivering consistent clinch and dependable fastening even under repeated use. The 5,000-staple pack gives you ample supply for frequent stapling work — making these staples a practical choice for warehouses, mailrooms, packaging lines, workshops, or home-improvement projects.
Key Features
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Leg Length: 5/16" — good balance of penetration and hold strength for medium-thickness materials
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Crown Width: 7/16" — stable crown for solid clinch and wide seam coverage
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Material: Heavy-wire steel — strong, durable construction suitable for repeated use
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Pack Size: 5,000 staples (sold only in 5 pack boxes with 1,000 staples per pack) — ample for bulk jobs, regular use, and high-volume stapling tasks
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Best Uses: Corrugated carton sealing, packaging, insulation backing, sheathing, light-wood attachment, general-purpose stapling
Ideal Applications
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Sealing and closing cardboard boxes and cartons
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Mailroom, shipping, and packaging operations
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Light construction work — attaching sheathing, plywood backing, or insulation
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Workshops, garages, and DIY projects requiring strong staples
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General stapling where deeper penetration and stronger hold are required
Why Choose Arrow JT21-516 Staples?
When you need more holding power and deeper staple drive than standard staples can offer, JT21-516 staples deliver. Their 5/16" leg length and heavy-wire construction make them versatile enough for many medium-duty to heavy-duty tasks, while the 5,000-count pack ensures you stay stocked even with frequent use. They offer a good balance of strength, reliability, and value for packaging, construction prep, or general stapling work.
