DuraWRX ASP-DCL-0101 DEF Cap | Locking | No Lanyard | Perkins T420125

New aftermarket DuraWRX locking diesel exhaust fluid (DEF) tank cap, part number ASP-DCL-0101, supplied without a lanyard. The cap locks with a sliding lock tab, is open vented through a hydrophobic membrane, and is rollover safe. It replaces Perkins DEF cap T420125.

Key Features:

• Locking design with a sliding lock tab
• Open vented through a hydrophobic membrane
• Rollover safe
• Marked "DEF ONLY" and "AdBlue ONLY"
• Replaces Perkins T420125

Specifications:

• Part number: ASP-DCL-0101
• Condition: New Aftermarket
• Component type: DEF tank filler cap, locking
• Lanyard: None
• Venting: Open vented, hydrophobic membrane; rollover safe
• Cap diameter (reference): 2.91 in (73.9 mm)
• Overall length including lock tab (reference): 3.99 in (101.4 mm)
• Overall height (reference): 2.48 in (63 mm)

Compatibility / Fitment:

Replaces Perkins DEF tank cap T420125. It also replaces Caterpillar 398-2993 and covers Link-Belt equipment. Select by the part number on your existing cap.

Hard fitment gate — locking vs. non-locking: This cap is locking. The non-locking cap without a lanyard is a different part and replaces a different set of OE part numbers.

Second gate — lanyard style: This cap has no lanyard. DuraWRX's locking caps with lanyards are:

• Lanyard with screw tab: ASP-DCL-0201
• Lanyard with loop: ASP-DCL-0301

What is not included: lanyard, filler neck or adapter, and tank.

Common interchanges: T420125, 398-2993, 3A 27043

Conclusion:

A locking, open-vented DuraWRX DEF tank cap with no lanyard, replacing Perkins T420125. Confirm the locking style and lanyard configuration against your existing cap before ordering.