Caps, HDPE, Orange — 300-3531-E20 | 1000/Bag | Caplugs® Evergreen

Slide-Fix™ PAP Jar Screw Caps — HDPE, Orange, 1000/Bag (300-3531-E20)

These Slide-Fix™ PAP jar screw caps are molded from high-density polyethylene (HDPE) and designed as replacement or companion closures for standard Slide-Fix™ PAP jars used in cytology and histology slide fixation workflows. Supplied non-sterile in a convenient 1000/Bag bulk pack, the orange color supports quick visual identification and color-coded organization across multiple staining or fixation stations. Part number 300-3531-E20 is a cost-effective, high-volume solution for labs that routinely cycle through large numbers of PAP jars.

Technical Specifications

Applications

• Closing and sealing Slide-Fix™ PAP jars during cytology slide fixation procedures
• Color-coded laboratory organization across multiple fixation or staining stations
• Replacement caps for PAP jars in high-throughput histology and cytopathology labs
• Secure containment of fixative solutions during specimen processing and transport
• Bulk restocking of cap inventory for labs with continuous slide preparation workflows

Material & Chemical Resistance

High-density polyethylene (HDPE) offers a broad general chemical resistance profile, including good compatibility with aqueous solutions, dilute acids and bases, and many common laboratory reagents, making it well suited to fixative containment applications. HDPE is rigid, durable, and resistant to stress cracking under normal laboratory use. Note that HDPE is not recommended for autoclaving, and compatibility should be verified for concentrated oxidizing acids or halogenated solvents before use.

Quality & Procurement

Made in USA, Caplugs® Evergreen Slide-Fix™ PAP jar screw caps are manufactured under ISO 9001 quality management from BPA-free, phthalate-free, latex-free HDPE resin. LabSupplies.com is an authorized dealer and ships from USA inventory, typically same business day for stocking items, with tiered pricing available for institutional and grant-funded laboratories.

Frequently Asked Questions

Are these screw caps sterile?
No — they are supplied non-sterile in 1000/Bag bulk packaging, which is appropriate for cytology and histology fixation applications that do not require sterile closures.

Will these caps fit PAP jars from other manufacturers?
These caps are designed for use with Caplugs® Evergreen Slide-Fix™ PAP jars. Fit on jars from other manufacturers cannot be guaranteed, as thread dimensions and tolerances may vary.

Is HDPE compatible with common fixative solutions used in cytology?
HDPE provides good general chemical resistance to many aqueous-based laboratory reagents. However, compatibility with any specific fixative formulation should always be confirmed before use, particularly with concentrated or aggressive chemical solutions.