Terminal Feed Through Connector - 5/16"-18 Studs (Black) - Terminal Feed Through Connector - 5/16

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Blue Sea Systems

2201-BSS

Through-bulkhead connector - 5/16"-18 studs (Black)

The Blue Sea 2201-BSS through-bulkhead connector provides secure and watertight passage for high-current cables (up to 250A, 48V) through bulkheads. Designed with 5/16"-18 tinned copper alloy studs and a reinforced thermoplastic body, it offers IP66 resistance and optimal electrical insulation. This model is a key component of the Blue Sea range for reliable marine electrical distribution. It is supplied with a serrated flange nut.

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23,51€

23,51€ ~~28,92€~~

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Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

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Installers near you

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Support service

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Technical specifications

Nominal voltage	48
Amperage	250.0
Number of circuits	1.0
Number of poles	2 Poles
Mounting type	Athwartship
IP rating	IP66
Certifications	IP66
Maximum cable lug size	8 mm
Dimensions (W x H x D)	50.8 x 50.8 x 31.8 mm
Abrasion resistance	Yes
Product barcode	SK-000044131
Body height	33.3
Body material	Zytel PA66 FR50NC010
Cable Strain Relief Integrated	Yes
Color	Black
Conductor Material Plating	Tinned
Connector type	Studs 5/16"-18
Corner Radius Mm	3.2
Installation cutout diameter (mm)	22.2
Designer name	T.DYKAS
Document Page Count	2
Drawing Date	2011-12-16
Drawing Scale Ratio	1:1
Electrical Isolation	Yes
Flammability Rating Material	UL94 V-0
Flammability Standard	UL94
Gasket included	No
High Current Application Focus	Yes
Manufacturer name	BLUE SEA SYSTEMS
Marine environment suitability	Yes
MasterBus compatible	No
Mounting Flange Thickness Mm	2.5
Mounting Flange Width Mm	16.7
Mounting hole diameter	5.2
Mounting Hole Edge Distance Mm	9.9
Horizontal mounting hole spacing	30.0
Vertical mounting hole spacing	22.1
Mounting Screw Size Imperial	#10
Mounting screw size (metric)	M5
NMEA 2000 compatible	No
Level 0 product category	Merchandise
Product category level 1	NAVICO GROUP
Model name	2201
Product use	Eliminates chafing and relieves tension when routing high-current cables through bulkheads, decks, and hulls.
Product series name	Terminal Feed Through Connector
Product type	Through-bulkhead connector
Sealant required	Yes
Number of studs	2
Stud Material	Tinned brass
Stud Material Alloy Type	Tinned copper alloy
Stud To Edge Distance Mm	20.6
Terminal Stud Length Mm	17.5
Terminal Stud Size Imperial	5/16"-18 UNC
Terminal type	Dowel

Detailed description

Designed for harsh marine environments, the BLUE SEA 2201-BSS through-bulkhead connector allows safe high-current cable routing through bulkheads, decks, or hulls. This component is essential for electrical installations requiring reliable insulation and protection against abrasion and water. It handles continuous current of 250A and maximum voltage of 48 VDC, specifications suitable for main electrical distribution systems aboard.

Design and materials for marine reliability

The 2201-BSS through-bulkhead connector features 5/16"-18 studs made of tinned copper alloy, providing high electrical conductivity and corrosion resistance. Its reinforced thermoplastic body ensures effective electrical insulation of the stud from the bulkhead material, preventing short circuits. Compared to more rudimentary cable pass-through solutions, this Blue Sea connector eliminates cable wear and provides excellent strain relief, extending the life of the installation.

Watertight and secure installation

Installation of the 2201-BSS is designed to be watertight, with a mounting face allowing the use of a gasket or sealant. Its IP66 environmental rating provides protection against dust and powerful water jets, ensuring system reliability even in rough sea conditions. Each connector is supplied with a one-piece serrated flange nut, guaranteeing adequate and secure electrical connections—a critical detail for performance and safety of marine electrical systems.

Documentation

Type	Nom
	EN - Dimensioned Drawing - Terminal Feed Through Connector - 5-16in-18 Studs (Black)

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis of the BLUE SEA 250A through-bolt connector »

The BLUE SEA 2201-BSS through-hull connector is a critical component for the safety and efficiency of marine electrical installations. Its utility is essential for creating isolated and robust cable entry points for heavy-gauge cables, typically between the engine compartment and the electrical panel, or for powering high-consumption equipment through a technical bulkhead. It turns a simple drilled hole into a secure electrical interface, preventing cable sheath abrasion on sharp edges and the risks of short circuits or water ingress.

In terms of installation scenarios, it is ideal for battery cable, alternator, or inverter/charger cable runs. Its reinforced thermoplastic body and tinned copper studs enhance connection longevity in saline and humid environments. The IP66 rating is a key indicator of its ability to withstand marine conditions, setting it apart from non-marine industrial solutions. It is critical to note that proper tightening of the serrated flange nut is essential to ensure a low-resistance connection and prevent overheating.

While versatile, this connector is specifically sized for 5/16"-18 studs and high currents. It is not the optimal choice for low-diameter signal cable runs or applications requiring multiple connections in a confined space. For these cases, terminal blocks or cable glands would be more appropriate. Its role is to provide a solid, isolated junction point for a pair of power cables.

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Through-bulkhead connector - 5/16"-18 studs (Black)

23,51€

23,51€ ~~28,92€~~

Frequently Asked Questions

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What is the Blue Sea 2201-BSS through-hull connector?

The Blue Sea 2201-BSS through-hull connector is an electrical component designed to safely route high-current cables through bulkheads, decks, or hulls of boats. It provides both electrical insulation and mechanical protection for the cables.

What is the main function of this connector?

Its primary function is to provide an isolated and watertight passage point for large-section cables, particularly in marine environments. It enables the distribution of electrical power from one compartment to another while protecting the cables from abrasion and ensuring effective insulation.

What is the maximum continuous current rating this connector can handle?

This connector is designed to handle a maximum continuous current of 250 amperes (A).

What is the maximum operating voltage of this connector?

The Blue Sea 2201-BSS through-hull connector is rated for a maximum of 48 volts direct current (VDC).

What materials is the 2201-BSS connector made of?

The connector body is made of reinforced thermoplastic (ZYTEL PA66 FR50NC010) for effective electrical insulation. The connection studs are made of tinned copper alloy, ensuring excellent electrical conductivity and corrosion resistance.

What is the environmental protection rating (IP) of this product?

The connector has an IP66 environmental rating. This means it is fully protected against dust and powerful water jets from any direction, making it ideal for marine applications.

What is the color of this connector?

The Blue Sea 2201-BSS through-deck connector is black.

What are the advantages of using this connector compared to a simple cable pass-through?

This connector provides several key benefits:

It ensures effective electrical insulation between the stud and the bulkhead.It prevents cable wear caused by friction against the edges of openings.It provides excellent strain relief for connected cables.It guarantees a watertight and secure installation thanks to its design and IP66 rating.

Is this connector suitable for outdoor or marine use?

Yes, absolutely. The 2201-BSS connector is specifically designed for demanding marine environments. Its corrosion-resistant materials and IP66 rating make it perfectly suited for outdoor and wet conditions.

What is the size and thread type of the connection studs?

The connection studs are size 5/16"-18 UNC (Unified National Coarse), which corresponds to a diameter of 5/16 inch with 18 threads per inch.

Which types of terminals or cables can be connected to 5/16"-18 studs?

5/16"-18 studs are compatible with standard cable lugs designed for this stud size (approximate metric equivalent M8). These lugs are commonly used for battery cables and heavy-gauge cables in marine applications.

Is this connector compatible with AC (alternating current) electrical systems?

No, this connector is rated for a maximum voltage of 48 VDC (direct current). It is not designed or certified for use with AC (alternating current) electrical systems.

Can this connector be used on metal bulkheads?

Yes, the reinforced thermoplastic body of the connector ensures effective electrical insulation of the stud from the bulkhead material. It can therefore be safely installed on metal bulkheads without risk of short-circuit.

Is it compatible with other Blue Sea Systems equipment?

Yes, as a standard component of Blue Sea Systems, it is designed to integrate into marine electrical systems using other products from the brand, such as busbars, circuit breakers, or distribution panels, provided that current and voltage specifications are met.

How is the 2201-BSS connector mounted on a bulkhead?

The connector is flush-mounted through a cutout in the bulkhead. It is then secured using screws through the two mounting holes provided on its front face.

What type and size of screw are required to secure the connector?

Mounting holes are sized for #10 screws (US standard) or M5 screws (metric standard).

What is the distance between the centers of the mounting holes?

The distance between the centers of the two mounting holes is 0.87 inches (22.2 mm).

Should a gasket or sealant be used during installation?

Yes, the mounting face of the connector is designed to allow the use of a gasket or sealant (sealing mastic) to ensure a perfectly watertight installation and maintain IP66 classification.

How to install the BLUE SEA 2201-BSS through-hull connector and ensure its watertight integrity?

The BLUE SEA 2201-BSS through-bulkhead connector is designed for installation through bulkheads, decks, or hulls. It features two 5/16"-18 UNC threaded studs for electrical connections. For mounting, it has two clearance holes sized for #10 or M5 screws.

To ensure waterproofing, this connector carries an IP66 environmental rating, meaning it is protected against dust and powerful water jets. It is recommended to use a gasket or appropriate sealant on the mounting surface during installation to provide maximum water protection.

What are the electrical specifications (current and voltage) of the BLUE SEA 2201-BSS through-bolt connector?

The BLUE SEA 2201-BSS through-bolt connector is designed to handle high-current electrical systems. It can support a continuous current of up to 250 amperes (A) and a maximum voltage of 48 volts direct current (VDC).

The 5/16"-18 studs are made of tinned copper alloy, ensuring excellent electrical conductivity and increased resistance to corrosion, which are essential for demanding marine environments.