LockNLube LNL134 50PC Yellow Grease Fitting Caps

The LockNLube LNL134 kit provides 50 bright yellow caps that protect Zerk fittings from dirt, moisture, and accidental contamination between service intervals. Each cap features an integrated collar that slides onto the fitting and keeps the cap tethered, so it won’t get lost during routine greasing. With a 1.67″ overall length and a 15/64″ inner cap diameter, these caps fit standard and metric grease fittings commonly found on trucks, construction equipment, agricultural implements, and industrial machinery. The securing loop has a 25/64″ eye to accommodate different attachment points, and it can be threaded onto 1/4″-28 SAE or M6 fittings.

For larger fittings—such as 1/8″ NPT—the strap can be placed over the top of the Zerk and the cap still seats securely. The high-visibility color makes fittings easy to spot during PM inspections, helping techs identify missed points and verify that caps are in place after greasing. Whether outfitting a new fleet or restocking the shop, this bulk pack keeps fittings clean and ready for a grease gun, reducing wear caused by grit and debris.

LockNLube 50PC Yellow Grease Fitting Caps At a Glance

• Fits SAE & metric Zerks: One size covers most grease fittings for simpler stocking.
• Integrated collar & tether: Cap stays attached to the fitting to prevent loss.
• High-visibility yellow: Makes Zerk locations easy to find during inspections.
• Flexible installation: Threads on 1/4″-28 or M6; strap fits over larger 1/8″ NPT fittings.
• Debris protection: Helps keep contaminants out to support longer component life.
• Bulk 50-pack: Economical supply for fleets, shops, and field service.
• 1.67″ overall length: Provides coverage without interfering with coupler access.

Markets

• Fleet & Truck Maintenance Protects chassis and suspension Zerks between service.
• Construction & Heavy Equipment Shields fittings on loaders, skid steers, and attachments.
• Agriculture Keeps grease points on tractors and implements clean in dusty fields.
• Industrial & Manufacturing Prevents contamination on presses, conveyors, and bearings.
• Municipal & Public Works Standardizes fitting protection across mixed vehicle fleets.
• Trade Schools & Training Centers Teaches best practices for Zerk protection and PM checks.

Maintenance teams in these environments rely on consistent protection for grease fittings to avoid premature wear. The LNL134 caps are easy to install, highly visible, and stay tethered to the fitting, so technicians won’t waste time searching for replacements. By keeping grit and moisture off the Zerk, these caps help ensure that grease flows freely when a grease gun coupler is attached. The flexible fit—thread-on for 1/4″-28 and M6, strap-over for larger 1/8″ NPT—means one kit supports mixed equipment. Stocking a 50-piece bag keeps drawers filled and service routes moving with fewer delays.

LockNLube LNL134 50PC Yellow Grease Fitting Caps Features

• Fits all standard grease fittings (SAE & Metric)
• Integrated collar slides onto the fitting, keeping the cap safely attached
• Yellow
• Also available in Red

LockNLube LNL134 50PC Yellow Grease Fitting Caps Includes

• (50) Yellow Grease Fitting Caps

LockNLube LNL134 50PC Yellow Grease Fitting Caps Specifications

• Model: LNL134
• Quantity: (50) Caps
• Color: Yellow
• Overall Length: 1.67 in
• Inner Cap Diameter: 15/64 in
• Securing Loop Eye Diameter: 25/64 in
• Primary Threading: 1/4″-28 SAE or M6 (strap-over fit for 1/8″ NPT)
• Fitting Compatibility: Standard SAE & metric grease fittings

Why Professionals Choose the LockNLube 50PC Yellow Grease Fitting Caps

Shops choose these grease fitting caps to keep Zerk fittings clean and easy to service. The tethered collar means caps stay with the machine, and the bright yellow color speeds visual checks so no fitting is overlooked. Techs can thread the strap onto 1/4″-28 or M6 Zerks or loop it over larger 1/8″ NPT fittings, covering a wide range of equipment with one SKU. By blocking grit and moisture, the caps help grease flow smoothly when the grease gun is attached, which reduces rework and extends component life. For fleets, heavy equipment, and farm machinery, this 50-pack provides a simple, cost-effective way to protect lubrication points and keep preventive maintenance on schedule.