Metric Compression Straight Bulkhead Female Coupling - Auto Lube System Fittings

Our Metric Compression Straight Bulkhead Female Coupling is the industry standard for distributing lubricants safely through high-frequency automatic lubrication networks and your commercial auto lube system. Engineered with an elongated center section, a dedicated panel counter-nut, and a precision-machined internal female thread, this solid bulkhead connector joins a metric tube line directly to a male pipe thread, gauge, or sensor across structural partitions. By anchoring fluid junctions securely to physical panel faces, it prevents line twisting, protects lines from stress in tight spaces, and coordinates secure grease delivery to progressive distribution blocks.

As a high-volume B2B manufacturer and global OEM supplier, we construct our auto lube system fittings on automated multi-axis precision lathes to guarantee flawless internal boring, perfectly centered alignment, and exact thread pitches on every component. Every production lot is subject to rigorous quality control auditing to ensure absolute structural stability under the severe, pulsing pressures common in automated lubrication networks.

Core Technical Blueprint & Alignment Engineering

• Optimized for LL Series Networks: Purpose-built for the Extra Light (LL) Series footprint, this straight female bulkhead coupling handles operating thresholds up to 100 bar, aligning seamlessly with the pressure boundaries of a modern auto lube system (machined for small-diameter tubing from 4mm to 12mm). Its minimized mass and extended exterior thread section ensure clean, flat mounting inside crowded machinery panels and chassis framing.

• Unified Female-to-Tube Partition Design: The tube entry point features a standard 24° internal cone tube seat machined to the same metric specifications as your main line, while the bulkhead side provides a clean, straight internal thread path. This design allows installers to transition from a rigid pipe or component thread into a flexible or semi-rigid run on the opposite side of a physical wall.

  • Identical Metric Connections: Integrates directly with standard metric lubrication tubing loops globally, ensuring an exact, localized fit without line modification.

Application & Compliance Standards

• Single Bite Sealing Integrity: Tightening the exterior compression nut drives the specialized cutting ring forward into the body seat, forcing it to bite cleanly into the exterior surface of the copper, steel, or high-pressure nylon tubing. Simultaneously, the heavy-duty locknut keeps the coupling locked stationary against the partition face. This rigid mechanical connection creates an unyielding seal that easily withstands high industrial vibrations, continuous machine cycling, and pressure shocks.

• Global Interchangeability: Manufactured in strict conformity with ISO 8434-1 and DIN 2353 extra-light guidelines. These straight bulkhead female couplings offer complete, drop-in compatibility with leading international fluid-handling brands. They serve as the trusted default choice for commercial vehicle chassis, wind turbine bearings, progressive distribution blocks, heavy mining machinery, and automated industrial assembly systems.