LockNLube LNL231 1/8″ NPT Standard Inline Grease Hose Swivel for Manual Grease Guns

The LockNLube LNL231 is a standard 1/8″ NPT inline hose swivel that makes greasing faster and easier on manual hand-pump grease guns. Installed between the gun and the hose, the swivel lets the hose rotate freely so you can line up your grease coupler without twisting the gun body or fighting a kinked whip hose. Built from heavy-duty steel and rated to 12,000 PSI, it handles day-to-day shop forces—both internal pressure and side loading—without seizing. The result is smoother coupler alignment on tight fittings, less wear on the whip hose, and a cleaner, more predictable grease flow.

This model is the standard LNL231 (1/8″ NPT) version used on most manual grease guns. LockNLube also manufactures thread-specific variants for popular cordless and air tools (fine 7/16″-28, coarse 7/16″-20, and M12 × 1), so mixed fleets can match the correct swivel to each gun. If you’ve ever struggled to hold a coupler square on a Zerk while the hose tries to spring back, a grease hose swivel is a simple upgrade that saves time at every lube point.

LockNLube 1/8″ NPT Standard Inline Grease Hose Swivel At a Glance

• 12,000 PSI rating: Safe for high-pressure greasing on tough fittings.
• Inline rotation: Lets the hose spin to align the coupler without twisting the gun.
• Heavy-duty steel body: Resists side loading and rough shop conditions.
• 1/8″ NPT standard threads: Fits most manual grease guns right out of the box.
• Smoother operation: Reduces hose kinks and helps keep the coupler square on the Zerk.
• Fleet-friendly options: Alternate thread versions available for common cordless and pneumatic guns.
• Compact size: Adds maneuverability without adding bulk at the gun handle.

Markets

• Fleet & Truck Maintenance Speeds daily PMs across mixed chassis and trailers.
• Construction & Heavy Equipment Improves access to hard-to-reach Zerks on loaders and excavators.
• Agriculture Simplifies greasing on implements and pivots where hose twist is common.
• Industrial & Manufacturing Supports preventive maintenance routes with consistent coupler alignment.
• Municipal & Public Works Useful for shop teams servicing varied equipment fleets.
• Trade Schools Teaches safe, efficient greasing technique and tool setup.

Technicians in these settings value a swivel because it reduces the small delays that add up during routine lubrication. By letting the whip hose rotate at the gun, the LNL231 keeps the grease coupler square on the fitting, which helps prevent leaks and keeps hands clear of moving parts. The 12,000 PSI rating handles stubborn zerks without concern, and the standard 1/8″ NPT threading matches most manual grease guns found in shops and service trucks. For mixed fleets, clearly labeled thread variants make it easy to standardize tool setups while keeping each gun correctly matched.

LockNLube LNL231 1/8″ NPT Standard Inline Grease Hose Swivel for Manual Grease Guns Features

• Rated to 12,000 PSI — safe for use with any grease gun
• Installs between grease gun and hose for smoother operation
• Heavy-duty steel body resists lateral forces
• Available in multiple thread types to fit nearly every grease gun

LockNLube LNL231 1/8″ NPT Standard Inline Grease Hose Swivel for Manual Grease Guns Includes

• (1) LNL231 1/8″ NPT Standard Inline Grease Hose Swivel

LockNLube LNL231 1/8″ NPT Standard Inline Grease Hose Swivel for Manual Grease Guns Specifications

• Model: LNL231 (Standard)
• Thread Size: 1/8″ NPT (gun/hose interface)
• Connection Style: Inline swivel, male × female 1/8″ NPT
• Maximum Pressure: 12,000 PSI
• Body Material: Steel
• Dimensions (Std 231): A: 1.48 in • B (Hex): 0.63 in • C (Body): 0.87 in
• Use Case: Installs between grease gun and whip hose to allow hose rotation
• Compatibility (Examples): Fits grease guns with 1/8″ NPT threads including most manual hand-pump models

Why Professionals Choose the LockNLube 1/8″ NPT Standard Inline Grease Hose Swivel for Manual Grease Guns

Maintenance crews choose the LNL231 because it improves control at the fitting without changing how they grease. The inline swivel lets the whip hose rotate, so the grease coupler stays square and sealed on the Zerk instead of skidding off under hose tension. On a manual grease gun, this small part reduces kinks, protects the hose, and helps deliver grease where it belongs. The 1/8″ NPT thread makes it a drop-in match for most hand-pump guns, and the 12,000 PSI rating handles stubborn fittings with confidence. For users searching for a “grease gun hose swivel” or “1/8 NPT swivel for manual grease gun,” the LNL231 offers a durable, compact solution that speeds routine lubrication and cuts frustration on every service round.