2x 4" Locking Diesel Fuel Cap for 1972-17 Peterbilt 330-587 Trucks 11-04859-200

4" Locking Diesel Fuel Cap for Peterbilt

This 4-inch locking diesel fuel cap secures your tank and replaces OE part numbers such as 11-04859-200.

Overview

This locking diesel fuel cap is designed for Peterbilt trucks from 1972 through 2017, providing a secure, leak-proof seal to prevent fuel siphoning and contamination. Fleet operators and owner-operators alike rely on a locking diesel fuel cap for added peace of mind on the road.

Built For Performance

• Two-pack includes matching keys for both caps, so one key fits all
• 4-inch diameter fits standard Peterbilt saddle tank fill necks
• Hardened locking core resists drilling and picking
• Rubber gasket ensures a tight, spill-free seal
• Heavy-gauge zinc body withstands rugged diesel environments
• Quick-turn bayonet-style mount for easy on/off

Fits These Machines

• for Peterbilt 330 (1972‑2017)
• for Peterbilt 587 (1972‑2017)

On-The-Job Use

• Secures fuel during overnight parking in truck stops
• Prevents siphoning at unguarded job sites
• Maintains fuel quality on farm and ranch diesel tanks
• Locks out contaminants on construction fleet trucks
• Provides keyed security for multi-driver operations

Specs At A Glance

Good To Know

Q: Will this locking diesel fuel cap fit my Peterbilt if it has a smaller filler neck? A: Measure your filler opening: the cap fits standard 4-inch necks on 1972‑2017 Peterbilt models; it will not seal properly on a different diameter.

Q: Can I use the same key for both caps? A: Yes, the pair of locking diesel fuel caps comes with matching keys, so you only need one key to unlock either cap.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.