Part Number: FS306

SAE ORFS Bulkhead Locknut

Product Overview

The Delphi Fittings Part FS306 is an SAE O-Ring Face Seal (ORFS) Bulkhead Locknut. This essential component is specifically designed to secure male ORFS bulkhead style fittings (such as the FS2700, FS2701, FS2702, FS2703, and FS2704 series) to a panel, bulkhead, or equipment wall. The locknut threads onto the body of the male ORFS bulkhead fitting on the opposite side of the panel, providing the necessary clamping force to hold the fitting firmly in place and ensure a stable pass-through for hydraulic lines. Manufactured from high-quality carbon steel and zinc-plated for corrosion resistance, the FS306 locknut is an indispensable part of any ORFS bulkhead installation, conforming to relevant dimensional aspects of SAE J1453 / ISO 8434-3 standards for thread and hex size compatibility.

Key Features & Specifications

Material	High-Grade Carbon Steel
Thread Type	Female UNF/UN (Unified National Fine/Unified National) straight threads, dimensioned to match the corresponding male ORFS bulkhead fitting body threads (per SAE J1453 / ISO 8434-3).
Design	Hexagonal locknut, typically manufactured with a profile suitable for bulkhead applications (may be thinner than standard service nuts but robust enough for securing).
Body Style	Hex nut for secure tightening with a standard wrench.
Compatibility	Specifically designed for use with SAE ORFS male bulkhead fittings (e.g., Delphi FS2700, FS2701, FS2702, FS2703, FS2704 series and similar).
Sealing Mechanism	This locknut primarily provides mechanical securing of the bulkhead fitting to the panel. It does not directly participate in the fluid seal, which is achieved by the O-ring on the male ORFS fitting ends. An additional flat washer or sealant may be used by the installer between the fitting shoulder/locknut and the panel if specific environmental sealing at the panel interface is required.
Corrosion Protection	Standard Zinc Plating for enhanced durability and resistance to rust and environmental factors.
Primary Function	To securely fasten an SAE ORFS bulkhead fitting to a panel, bulkhead, or wall, preventing movement and ensuring a stable connection point for ORFS hydraulic lines.
Standard	Conforms to relevant dimensional aspects of SAE J1453 / ISO 8434-3 for thread and hex size compatibility with ORFS bulkhead fittings.

Commonly Available Sizes (Part #FS306 Series)

Delphi Fittings offers the FS306 SAE ORFS Bulkhead Locknut in a full range of sizes to match standard ORFS bulkhead fittings. The size is designated by the ORFS dash number corresponding to the bulkhead fitting it is intended to secure.

Examples include (for ORFS Bulkhead Fitting Size):

FS306-04: For -04 (9/16-18 UNF Thread) ORFS Bulkhead Fittings
FS306-06: For -06 (11/16-16 UNF Thread) ORFS Bulkhead Fittings
FS306-08: For -08 (13/16-16 UNF Thread) ORFS Bulkhead Fittings
FS306-10: For -10 (1-14 UNS Thread) ORFS Bulkhead Fittings
FS306-12: For -12 (1-3/16-12 UN Thread) ORFS Bulkhead Fittings
FS306-16: For -16 (1-7/16-12 UN Thread) ORFS Bulkhead Fittings
FS306-20: For -20 (1-11/16-12 UN Thread) ORFS Bulkhead Fittings
FS306-24: For -24 (2-12 UN Thread) ORFS Bulkhead Fittings

Note: Ensure the locknut size correctly matches the SAE ORFS bulkhead fitting being installed. For unlisted sizes or specific requirements, please contact our sales team.

Applications

The Part FS306 SAE ORFS Bulkhead Locknut is an indispensable component for:

Securely fastening all types of SAE ORFS bulkhead fittings (straight unions, 45° elbows, 90° elbows, branch tees, run tees) to panels, plates, equipment walls, or machinery chassis.
Essential for hydraulic system installations in mobile equipment (construction, agriculture, forestry), industrial machinery, transportation, manufacturing, and any application requiring a fixed and stable ORFS connection point through a barrier.
Ensuring the integrity and stability of through-panel hydraulic connections that utilize the ORFS sealing system.

Installation & Usage Guidelines

Verify that the panel hole is correctly sized to accommodate the body of the SAE ORFS bulkhead fitting.
Insert the ORFS bulkhead fitting through the prepared panel hole.
Thread the Part FS306 SAE ORFS Bulkhead Locknut onto the protruding threads of the bulkhead fitting on the opposite side of the panel.
Tighten the locknut securely against the panel surface using an appropriately sized wrench. It is generally necessary to use a second wrench on the hex or flats of the bulkhead fitting body itself to prevent it from rotating while the locknut is being tightened.
Ensure the locknut is tightened sufficiently to hold the bulkhead fitting firmly in place, preventing any movement or vibration that could compromise the hydraulic ORFS connections or the panel seal. The locknut's primary role is mechanical retention.

Why Choose Delphi Fittings Part FS306?

Secure Fastening Solution: Provides a robust and reliable method for securing SAE ORFS bulkhead hydraulic fittings to panels and enclosures.
Correct Fit and Compatibility: Designed to SAE J1453 dimensional standards, ensuring proper fit and function with corresponding ORFS bulkhead fittings.
Durable Material Construction: Manufactured from high-grade carbon steel for excellent strength and long service life in demanding conditions.
Enhanced Corrosion Resistance: Standard zinc plating offers superior protection against rust and environmental factors.
Essential Installation Component: Critical for the correct, safe, and stable installation of any SAE ORFS bulkhead style fitting.
Quality-Assured Manufacturing: Produced under Delphi Fittings' rigorous ISO 9001:2015 certified quality management system, guaranteeing consistent quality.

Get a Quote for Part FS306 - SAE ORFS Bulkhead Locknut

Ensure the secure and stable installation of your SAE ORFS bulkhead fittings with the essential Part FS306 Locknut. Contact Delphi Fittings today for wholesale pricing, bulk order details, and expert technical support for all your hydraulic component needs.

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