LK Packaging KF0304HD Kwik-Fill® Pre-Opened Bag 3″ x 4″ Heavy Duty 2.8 Mil LLDPE | Automatic Packaging

LK Packaging KF0304HD Kwik-Fill® Pre-Opened Bags — 3″ x 4″, 2.8 Mil Heavy Duty LLDPE for Automatic Packaging

The LK Packaging KF0304HD is a 3″ x 4″ heavy-duty Kwik-Fill® pre-opened bag on a roll for automated packaging equipment handling sharp or abrasive small parts. At 2.8 mil LLDPE, this bag provides maximum puncture resistance in the longer 4″ format — accommodating taller hardware items, multi-piece industrial fastener sets, and extended components that require both the 3″-wide profile and additional bag length for clean closure above the packed contents. A staple in hardware distribution and industrial parts packaging programs.

What Products Require the Longer 3″ x 4″ Format Over the 3″ x 3″?

The KF0304HD’s 4″ length is suited for longer hardware items such as longer machine screws, anchor bolts, drill bit samples, cable connectors, and multi-piece kits where the contents or headspace requirements exceed the 3″ bag format. The extra inch of bag length also improves seal quality by keeping the seal zone clear of product contact in taller-packed kits.

Why Is 2.8 Mil LLDPE Critical for Hardware Packaging on Automatic Lines?

Automatic hardware bagging lines run at high cycle speeds, causing metal fasteners to impact bag walls during pneumatic filling. At 2.8 mil, LLDPE withstands this impact without puncture or propagating tears — unlike lighter gauges that fail under sharp fastener contact at high filling speeds. Heavy-duty construction also resists abrasion from mixed fastener loads during bag sealing and downstream conveyor transport.

Plumbing Supply Distributors Use KF0304HD for Heavy-Duty Fitting and Ferrule Kit Packaging

Plumbing hardware distributors and plumbing supply OEM packagers producing compression fitting kits, ferrule sets, and threaded brass hardware bags for trade and retail supply programs rely on the LK Packaging KF0304HD’s 3″ x 4″ heavy-duty format to accommodate the length and weight of copper fittings and brass hardware components. The 2.8 mil LLDPE withstands the sharp edges and weight of metal plumbing components without bag failure during automated filling and sealing.

How Does KF0304HD Relate to Other 3″ x 4″ Kwik-Fill® Bags?

The KF0304 series includes KF0304HD (2.8 mil LLDPE), KF0304MD (1.9 mil LDPE), KF0304ST (1.4 mil LLDPE), and KF0304STV (1.4 mil LLDPE with vent holes). All share the 3″ x 4″ dimensions and are compatible with 3″-wide pre-open automatic bag equipment. Select the gauge based on your contents’ sharpness, abrasiveness, and protection requirements.

Where Can I Order LK Packaging KF0304HD Bags for My Packaging Operation?

LK Packaging KF0304HD heavy-duty 3″ x 4″ Kwik-Fill® pre-opened bags are available at NFCbags.com with bulk pricing for plumbing distributors, hardware packagers, and industrial parts facilities. Contact NFCbags.com for case quantity pricing and volume discounts.