Threaded Spring Pin 327-331 – Greasable Suspension Pin for Mack RB/R/RD Trucks

The 327-331 Threaded Spring Pin is a precision-engineered suspension component designed for use in Mack RB, R, and RD series trucks. Ideal for both front and rear of front spring positions, this pin features a durable threaded design that mates with MTB186/MTB188 bushings to ensure proper leaf spring alignment.

Equipped with a serviceable grease fitting, it offers long-lasting performance in demanding fleet and vocational applications.

OEM Cross References:
327‑331, M5266, B139962, B1399‑62, E3717, E‑3717, 25161382, 44QK26, 44QK26A

Key Features:
• Application: Mack RB, R, RD series trucks
• Position: Front and rear of front spring
• Threaded design with grease fitting
• Ensures proper leaf spring alignment
• Built to OEM standards for durability