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The CAPLUGS 99120137 is a red polyethylene protective plug sold in a 100-piece pack. Protective plugs of this type are used to seal open ports, fittings, tubes, and threaded openings during storage, transport, or installation work. They prevent contamination, debris ingress, and thread damage on equipment and piping systems. The polyethylene construction resists moisture and common shop chemicals, making the plugs suitable for use across HVAC, plumbing, and general mechanical applications. The pack quantity of 100 supports shop stock and job-site use without frequent reordering.
These plugs are a standard consumable in mechanical and equipment trades. HVAC technicians, plumbers, and equipment maintenance crews use protective plugs when capping refrigerant ports, hydraulic fittings, threaded pipe ends, and machined bores during equipment staging or repair. The red color provides a visible indicator that a port or opening has been protected, which helps prevent accidentally leaving a plug in place during reassembly or commissioning.
Designed as an OEM-style protective plug for general use across mechanical, HVAC, plumbing, and equipment maintenance applications where port or fitting protection is required.
Protective plugs are installed and removed by hand or with light hand-tool assistance depending on fit. Always confirm the plug is fully removed before pressurizing any system or initiating fluid flow. Inspect the seated plug to ensure it is not deforming or displacing under any residual pressure. Disposal of single-use plugs after system commissioning is standard practice.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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