Transmission & Foundry Parts Flat Poly Bags 18" x 18" — 6 mil LDPE
These 18" x 18" flat poly bags are manufactured at 6 mil gauge for industrial packaging applications where standard poly bags are insufficient. The heavy LDPE construction handles abrasive, oily, or sharp-edged parts without puncture or tear failure. The square format fits transmission covers, differential housings, cast iron manifolds, and other large machined components that require surface protection during storage, interplant transit, or customer shipment.
Specs: 18" x 18" | 6 mil | Virgin LDPE | 250/Box | FDA/USDA Compliant
Applications
- Transmission housings, gear covers, and powertrain component storage
- Foundry castings and raw machined part interplant protection
- Heavy automotive and truck parts packaging for distribution
- Industrial pump impellers, valve bodies, and bearing housing protection
- Construction hardware — heavy bolt sets, anchor plates, and pipe fittings
- OEM part kitting and assembly line component staging
Features
- 6 mil gauge — extra-heavy construction resists puncture from sharp metal edges
- 18" x 18" square format sized for large flat or boxy industrial components
- Virgin LDPE resin — no recycled content, consistent gauge throughout
- Bottom seal construction for maximum load strength
- Heat sealable, tie-closable, and compatible with tape and staple closures
- Maintains flexibility at low temperatures — suitable for cold warehouse storage
- 250 bags per box for industrial stocking quantities
Material Notes
Manufactured from virgin low-density polyethylene (LDPE) resin at a nominal 6 mil (0.006 inch) gauge. All stated gauges are nominal. Virgin LDPE provides consistent tear strength, elongation, and resistance to stress cracking compared to recycled-content alternatives. Bottom seal construction delivers strong load-bearing performance for heavy metal components. Complies with FDA 21 CFR and USDA requirements for incidental food contact if needed.
Use Case Notes
At 6 mil, these bags are appropriate for parts with machined edges, casting flash, or abrasive surfaces that would puncture lighter-gauge poly bags. The 18x18 square format accommodates components up to approximately 17.5" per side. For parts that generate oil or cutting fluid residue during machining, seal the bag completely with an impulse sealer to prevent contamination of adjacent components in shipping containers or storage bins.
Common Questions
Q: Is 6 mil the right thickness for sharp metal parts?
A: 6 mil is heavy-duty and appropriate for most machined metal parts with normal edge profiles. For castings with acute flash or very sharp tooled edges, consider additional interleaf wrapping. For smooth or lightly deburred parts, 6 mil provides reliable protection.
Q: Are these FDA/USDA compliant?
A: Yes. These bags are manufactured from virgin LDPE resin complying with FDA 21 CFR and USDA requirements for food contact applications. This compliance is incidental — these bags are primarily used for industrial and mechanical applications.
Q: Can these be heat sealed?
A: Yes. 6 mil LDPE heat seals well with standard impulse sealers. Sealing temperature and dwell time should be adjusted upward compared to settings used for 2–3 mil bags. Test seal on a sample bag before production runs.
Q: What other sizes are available in 6 mil?
A: We stock 6 mil flat poly bags in a range of sizes for industrial applications. Contact us or browse our industrial-gauge product line for available dimensions.
Why Buy
When your parts require a bag that holds up to metal edges, oily surfaces, and rough handling through manufacturing and distribution, 6 mil LDPE is the working standard. The 18x18 format covers the square footprint most transmission and foundry component packaging requires. Purchased in 250-count box quantities from a wholesale source with consistent specification and reliable stock availability.
