Staples STARPAK STK ZAKL2 — industrial 40 mm, 20,000 pcs, round crown, three-strip pack

Industrial staples STARPAK STK ZAKL2 are designed for heavy-duty stapling applications that require long-leg, round-crown fasteners. Each staple measures 40 mm in leg length and is intended for binding thick stacks of paper, multiple layers of cardboard, packaging materials and light upholstery tasks. The product is supplied in a large total quantity of 20,000 pieces, arranged as three-strip packs compatible with heavy staplers and stapling machines built to accept round-crown, long-leg staples.

Advantages

These 40 mm staples provide deep penetration and secure clinch for thick materials, reducing the need for repeated fastening. The round crown shape distributes pressure evenly across the stapled surface, helping to prevent material tearing or folding at the fastening point. Supplied in three-strip packs and in a bulk quantity, the product offers efficient refilling for industrial staplers and steady availability for high-volume stapling operations.

Suitable for

• Binding thick paper stacks and booklets
• Securing multiple layers of cardboard and corrugated board
• Packaging assembly and closing heavy cartons
• Light upholstery and furniture padding tasks
• Use in compatible heavy-duty staplers and automated stapling machines

Key specifications

• Leg length: 40 mm
• Crown type: round crown
• Quantity: 20,000 pieces per pack set
• Packing format: three-strip packs for stapler refilling
• Intended application: heavy-duty stapling of paper, cardboard, packaging and light upholstery

How to use

Verify that your heavy-duty stapler or stapling machine supports long-leg, round-crown staples of 40 mm leg length before loading. Follow the stapler manufacturer's instructions to open the magazine, insert the three-strip packs in the correct orientation and close the magazine securely. Position the materials to be fastened so the staple legs can fully penetrate the stack; operate the stapler using the prescribed force or machine settings to achieve a proper clinch. For automated equipment, confirm feed alignment and perform a test staple to check penetration and clinch quality.

Usage recommendations

Store staples in a dry environment to prevent corrosion and keep them in their original packs until use to ensure smooth feeding. When stapling very dense or layered materials, perform a test on scrap material to confirm adequate penetration and clinch. Replace magazine springs or feed components in the stapler as recommended by the tool manufacturer to avoid misfeeds when using bulk packs.