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Pelican-Hardigg™ Interstacking Pattern Cases (ISP)/
Pelican-Hardigg™ Interstacking Pattern Cases (ISP)/
IS4521-2303
Have a spec or part number? Send it over. Not sure yet? Tell us what you're protecting and what's keeping you up at night.Standard case or custom foam protection - we'll get you the right solution either way.

The Pelican-Hardigg™ ISP Case IS4521-2303 is an InterStacking Pattern cargo case measuring 45" x 21" x 26" inside and 48" x 24" x 32" outside, weighing 72 lbs without foam. With foam it weighs 103 lbs, base and lid depths are 23" / 3".
Built around the patented Inter-Stacking Pattern, the IS4521-2303 mates a disc-pattern base to the wave-pattern top of the case beneath it, so stacked cases fall into place and lock, keeping cargo from shifting in transit and making cross-stacked loads fast and stable.
Sized to maximize standard logistics platforms including standard and NATO pallets, JMIC containers, 463L pallets, and sea containers, the ISP system covers six sizes from about 4 to 25 cubic feet. A silicone sponge O-ring and pressure-release valves hold up in wet conditions and extreme weather.
Backed by MIL-STD-810F testing, the IS4521-2303 can be configured by TacRugged with hardware, coatings, integration panels, and custom foam interiors built around your load.
Let us customize a
Pelican-Hardigg™ Interstacking Pattern Cases (ISP)
to your mission.
Let us customize a
Pelican-Hardigg™ ISP Case IS4521-2303
to your mission.
Personalize the outside of your case to match your company’s branding. Add your logo with our hot stamp imprint process, which is scratch resistant; or add a custom logo decal or engraved name plate.
Engraved Name Plate
Custom Logo Decal
Vibrant Hot Stamp Imprint

Get custom foam inserts engineered for your
Pelican-Hardigg™ Interstacking Pattern Cases (ISP)
that are built to lock in critical gear, reduce movement, and keep your loadout mission-ready inside a rugged hard case. From military and defense to sensitive electronics, TacRugged makes the box work for you with fit-for-purpose, customizable foam layouts.
Military / Defense
Avionics / Aerospace
Weapons, Optics, Fire Control
Electronics, Test & Measurement
Space & Satellite