Flat Poly Bags 8″ x 8″ 6 mil 1000/Box

Cast Iron Valve & Fitting Poly Bags 8×8 — 6 mil LDPE | 1000

These 8″ x 8″ flat poly bags are produced from 6 mil 100% virgin LDPE resin — the extra-heavy gauge in the poly bag spectrum. The square format and extreme thickness make these an ideal fit for cast iron fittings, valve components, bronze couplings, and other heavy machined or cast parts that would puncture or abrade standard-gauge bags during handling and shipment.

Specs: 8″ x 8″ | 6 mil | 100% Virgin LDPE | 1000/Box | FDA/USDA Compliant

Applications

• Cast iron and ductile iron pipe fittings — elbows, tees, couplings, and flanges
• Bronze and brass valve bodies for plumbing and industrial distribution
• Heavy forged hardware — hooks, shackles, turnbuckles, clevis pins
• Hydraulic fittings and manifold components in fluid power distribution
• Small engine blocks and transmission components in remanufacturing operations

Features

• 6 mil extra-heavy gauge — highest puncture and abrasion resistance in standard flat poly bag formats
• Square 8×8 format fits symmetrical cast and machined components without excess film
• Bottom seal or side-weld construction for maximum corner strength under load
• Open-end format — heat sealable, ties, staples, or tape closures
• 100% virgin LDPE resin — consistent thickness and strength throughout the case
• FDA/USDA compliant resin

Material Notes

At 6 mil nominal, this is the thickest standard flat poly bag available — significantly heavier than the 4 mil industrial grade. The extra wall thickness provides greater resistance to cuts and abrasion from rough cast surfaces, sharp threads, and burrs. LDPE remains flexible across a wide temperature range, which is important for cold-storage parts rooms and outdoor staging areas.

Use Case Notes

The 8×8 square footprint is specifically useful for parts that have roughly equal width and height dimensions — valve bodies, gate valves, flanges, and socket fittings. For industrial distributors, the 1000-count box supports high-volume bagging of individual SKUs ahead of kitting or bulk shipment. Square bags reduce material waste compared to rectangular bags when packaging square or round components.

Common Questions

Q: What is the difference between 4 mil and 6 mil bags for heavy parts?
A: 4 mil handles most industrial hardware with sharp edges and moderate weight. 6 mil is appropriate for rough cast surfaces, heavier components (1–5 lbs per part), or situations where bags are handled aggressively (tossed into bins, stacked under load). The additional thickness substantially reduces puncture failures in these conditions.

Q: Can these be heat sealed after loading?
A: Yes. The open-end LDPE construction is compatible with impulse heat sealers. Heavier gauges may require slightly higher temperature settings than 2 or 3 mil bags — test with your sealer before production runs.

Q: Are these bags FDA/USDA compliant?
A: Yes. The resin meets FDA/USDA specifications, making these suitable for food-adjacent or food-contact applications in addition to industrial use.

Why Buy

These 8×8 6 mil LDPE bags provide the extra-heavy protection required for cast iron, forged, and rough-machined components that damage lighter bags in the field. The 1000-count box supports high-volume industrial distribution, kitting operations, and OEM parts packaging where bag failures lead to lost parts, contamination, and rework costs.