Precision Shaft & Linear Rail Poly Bags 12x30

These 12 x 30 in. flat poly bags at 6 mil provide extra-heavy gauge protection for precision-machined components including shafts, linear rails, lead screws, and other cylindrical or prismatic parts requiring surface and corrosion protection during storage and transit. The 6 mil LDPE wall resists abrasion, moisture, and incidental contact that would damage ground or polished surfaces.

Specs: 12 x 30 in. | 6 mil | LDPE | 250/Box | FDA Compliant

Applications

Used by precision parts manufacturers, machine tool distributors, and industrial MRO suppliers for individually bagging shafts up to 30 in. in length, linear guide rails, actuator rods, hydraulic piston rods, and similar elongated machined components. Also used in the woodworking and furniture industry for bagging table legs, dowels, and turned hardware components requiring heavy-duty surface protection.

Features

• 6 mil LDPE construction provides maximum puncture and abrasion resistance for machined metal parts
• 12 in. wide opening accommodates large-diameter cylindrical components and flat rail profiles
• Open-end design enables sliding or insertion loading for elongated parts
• Heat sealable; can also be closed with tape, ties, or staples
• Made from 100% virgin LDPE resin meeting FDA and USDA specifications

Material Notes

At 6 mil nominal gauge, this is the heaviest wall thickness in the standard flat poly bag line. LDPE at this thickness provides excellent resistance to puncture from threaded shaft ends, keyways, and cut rail edges. The bag will not embrittle or crack under ambient warehouse storage conditions. LDPE provides a slight moisture vapor barrier, suitable for corrosion-sensitive carbon steel components during short-term storage and transit.

Use Case Notes

The 12 x 30 in. footprint covers most machine tool linear rail segments under 30 in., standard hydraulic cylinder piston rods, and CNC ballscrew assemblies at common travel lengths. In the firearms and sporting goods sector, 12 x 30 in. bags cover most rifle barrel and shotgun barrel lengths for individual protection during storage or shipment.

Common Questions

Q: Is 6 mil necessary for shaft and rail packaging?
A: For precision-ground surfaces where any abrasion is unacceptable, 6 mil provides a meaningful barrier. For less critical surface finishes, 4 mil may be sufficient. The 6 mil gauge is standard practice in CNC and motion control parts distribution.

Q: Can these be used for corrosion protection?
A: LDPE provides a degree of moisture vapor barrier. For long-term corrosion protection of bare steel parts, consider also inserting a VCI (vapor corrosion inhibitor) paper or emitter inside the bag.

Q: Are these FDA compliant?
A: Yes. Made from virgin LDPE resin meeting FDA and USDA food contact specifications.

Why Buy

At 250 per box, this count is suitable for medium-volume parts distribution without excessive overstock of a specialty heavy-gauge bag. The 6 mil gauge covers the widest range of industrial part geometries at this size, reducing the need to stock both 4 mil and 6 mil options for a similar product line.