Thomas & Betts 7" TY25MX Cable Ties 50 lb UV-Resistant Black with Stainless-Steel Lock — 1000-Pack, Plenum-Rated

Thomas & Betts TY25MX cable ties are 7-inch, 50 lb tensile-strength, UV-resistant black nylon ties with a stainless-steel locking barb sold in a 1,000-piece bulk pack.

These heavy-duty cable ties are engineered for demanding indoor and outdoor applications that require corrosion-resistant locking, long service life in sunlight-exposed environments, and reliable bundling of wires, hoses, or conduit. Made in the United States and plenum rated for air-handling spaces, the TY25MX combines a stainless-steel locking mechanism with halogen-free nylon construction to support industrial, commercial, and residential installations.

How durable are these ties for outdoor and UV-exposed projects?

The TY25MX ties include UV stabilization in the nylon compound to resist sunlight degradation and retain strength over time. Their usability range extends from -76°F up to 185°F, so they tolerate severe cold and high-heat environments.

• UV-resistant black nylon for outdoor longevity
• Temperature range: -76°F to 185°F
• Stainless-steel locking barb prevents corrosion at the clamp point
• Halogen-free material for reduced off-gassing in sensitive environments

What size and load capacity can I expect, and what bundles will they secure?

Each tie measures approximately 7.3 inches long with a nominal width of 0.18 inches and a thickness of 0.04 inches. With a rated tensile strength of 50 pounds, they’re designed to fasten medium-size cable bundles and small hose assemblies securely.

• Actual length: 7.3 in (nominal 7 1/2 in)
• Width: 0.18 in; thickness: 0.04 in
• Max recommended bundle diameter: about 1.75–1.89 in
• 50 lb tensile strength for medium-duty applications

Is the stainless-steel lock better than all-plastic designs?

The integrated stainless-steel barb increases resistance to wear and corrosion at the locking point compared with all-plastic heads, improving long-term security where vibration, moisture, or outdoor exposure are factors. It also helps maintain clamp integrity when tightened around irregular or layered bundles.

• Stainless-steel lock reduces risk of plastic-head shear or wear
• Better corrosion resistance for marine or outdoor settings
• Maintains clamping force under vibration and temperature swings
• Simple installation with standard cable-tie tools or by hand

What approvals and special ratings does this product carry?

These ties are plenum rated and designated UL Type 2 and 21S, making them suitable for air-handling spaces and many commercial electrical installations. Although not metal-detectable or flame-retardant, their halogen-free composition and U.S. manufacture are advantages in regulated or safety-conscious projects.

• Plenum rated for use in air-handling plenums
• UL Type 2 and 21S designations
• Halogen-free material for reduced hazardous emissions
• Manufactured in the United States

Who is this for? Installers, electricians, HVAC technicians, facility maintenance teams, and pro DIYers who need a high-volume supply of medium-duty cable ties with UV resistance and a corrosion-resistant fastening mechanism will find this 1,000-count pack of Thomas & Betts TY25MX ties especially useful. They’re suited to outdoor cable runs, plenum installations, panel wiring, and bundling tasks where reliable long-term performance is important.