Zirgo 15758 Direct Connect Billet Heater Hose Nipple Bulkhead Fitting with Jam Nut

The Zirgo 15758 Direct Connect Heater Hose Nipple is a precision-machined billet aluminum bulkhead connector designed to provide a clean, leak-free connection for 5/8" heater hoses passing through a vehicle's firewall. Part of Zirgo's modular Direct Connect bulkhead system, this threaded-input nipple-output fitting allows builders to create a fully customized firewall hose routing solution without drilling multiple individual holes of varying sizes.

Key Features:

• Fits 5/8" heater hose — designed specifically for standard heater hose applications
• Threaded input / nipple output — thread size 22 mm, thread pitch 1.75 mm
• Polished billet aluminum construction — corrosion-resistant finish built to last
• Jam nut included — everything needed for secure bulkhead mounting
• CAD engineered — precision tolerances ensure proper fit and sealing
• Easy installation — installs with basic hand tools
• Compatible with Zirgo's modular bulkhead system — mix and match connectors for a completely custom firewall configuration
• Limited Lifetime Warranty — backed by Zirgo's confidence in their components
• Designed in the USA

Dimensions: Total Length: 1.95" (49.75 mm) | ID: 0.48" (12.36 mm) | OD (widest point): 1.1" (28.10 mm) | OD (narrow point): 0.63" (16.20 mm)

Packaged in a single-sided blister pack. This fitting is an ideal component for custom hot rod, restomod, and street rod builds where a clean, professional firewall penetration is required for the heater hose circuit.