-17% sale
Sierra Qualifies for Free Shipping Sierra Terminal Stud D HD M8/M10 with Isolating Plate #FS46590
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Terminal Stud D HD M8/M10 with Isolating Plate #FS46590 $36.49 $43.55
Sierra FS46590 Components Insulated dual stud post with isolating plate Designed to provide a termination point allowing the extension of harnesses and other wires Securely connects heavy-duty, high-amperage cables An insulated base ensures no leakage to metal hulls Glass Fiber reinforced Nylon base ensures great mechanical strength and durability 48VDC Max Operating Voltage Stud Sizes: Stud 1 M10; Stud 2 M8 (Replaces 3/8 and 5/16) Interchange: Blue Sea: 2018 Normalized SKU: FS46590UPC Code: 808282381981
-17% sale
Sierra Qualifies for Free Shipping Sierra Mounting Bar Dual MRBF #FS84260
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Mounting Bar Dual MRBF #FS84260 $40.94 $49.12
Sierra FS84260 Components Ignition Protected Bolt-down design for high-vibration applications Standard isolated M8 stainless steel stud allows for stacking of terminals Prevents accidental shorts with a protective, insulating cap Perfect in tight spaces to provide high current protection Compact and designed for DC Main, Bow Thruster, Inverter, and Windlass circuit protection 300A maximum amperage Mounts on 3/8” terminal studs Accepts 5/16" ring terminals Normalized SKU: FS84260UPC Code: 808282385637
Sold out -17% sale
Sierra Qualifies for Free Shipping Sierra Terminal Organizer #FS46900
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Terminal Organizer #FS46900 $59.99 $71.98
Sierra FS46900 Components Provides an easy DC power distribution point without overloading single battery terminals Designed to fit most 12V top post batteries Adheres to ABYC 10.8.4.1 and 10.8.3 recommendations • 4 x 1/4”-20 Studs and 2 x 5/16”-18 Studs for different wire size connections Tin-Plated Copper Bus and S.S. Hardware for maximum conductivity and corrosion resistance Fits Group 24-31 Series Batteries Normalized SKU: FS46900UPC Code: 808282384333
-17% sale
Sierra Qualifies for Free Shipping Sierra Terminal Stud Single HD M10 #FS46540
00
DAYS 00
HRS 00
MIN 00
SEC
Sierra Sierra Terminal Stud Single HD M10 #FS46540 $22.37 $26.70
Sierra FS46540 Components An insulated single stud post is designed to terminate heavy-duty cables for one or more connections Securely connects heavy-duty, high-amperage cables An insulated base ensures no leakage to metal hulls Glass Fiber reinforced Nylon base ensures great mechanical strength and durability 48VDC Max Operating Voltage Stud Size: M10 (Replaces 3/8) Interchange: Blue Sea: 2003 Normalized SKU: FS46540UPC Code: 808282382131
Sold out -17% sale
BEP Marine Qualifies for Free Shipping BEP Distribution Stud 3/8
00
DAYS 00
HRS 00
MIN 00
SEC
BEP Marine BEP Distribution Stud 3/8" with Red Base #IS10MM1R $25.61 $30.56
BEP Marine IS10MM1R Components Insulated Stud 3/8" RedThese distribution studs are ideal for heavy-duty connections. The studs are tinned copper and are available in single and dual isolated modules. Color-coded red positive, black negative, bases for easy identification.Normalized SKU: IS10MM1RUPC Code: 870216020181
Sold out -17% sale
BEP Marine Qualifies for Free Shipping BEP Double Insulated Stud 10mm/8mm #IST10MM8MM
00
DAYS 00
HRS 00
MIN 00
SEC
BEP Marine BEP Double Insulated Stud 10mm/8mm #IST10MM8MM $35.26 $42.09
BEP Marine IST10MM8MM Components Insulated Double StudIncreased stainless steel stud length allows up to three large cable lugs to be connected. The clear polycarbonate cover provides insulation/protection, while the snap-out side skirts allow for additional cable entry. The power tapping plate variant provides additional termination points for small cables.Normalized SKU: IST10MM8MMUPC Code: 843687006978
-17% sale
Sea-Dog Qualifies for Free Shipping Sea-Dog Electrical Connector #426234-1
00
DAYS 00
HRS 00
MIN 00
SEC
Sea-Dog Sea-Dog Electrical Connector #426234-1 $34.32 $40.96
Sea-Dog 426234-1 ComponentsThermoplastic Electrical Connector - 4 pin - 5 ampPolarized Electrical Connector - Machined Brass/Injection Molded Thermo PlasticA: 2-1/16 Inch B: 1-7/8 Inch - 5 Amps - Pin: 4 - Fastener: 5As a safety feature, polarized pins are sized to be connected in only one way.Seadog Electrical Connector 426234-1Normalized SKU: 4262341UPC Code: 035514426114
-17% sale
Sea-Dog Qualifies for Free Shipping Sea-Dog 4-Prong Electrical Connector #426164-1
00
DAYS 00
HRS 00
MIN 00
SEC
Sea-Dog Sea-Dog 4-Prong Electrical Connector #426164-1 $22.60 $26.97
Sea-Dog 426164-1 ComponentsSea-Dog 4-Prong Electrical Connector #426164-1Normalized SKU: 4261641UPC Code: 035514426251
-15% sale
00
DAYS 00
HRS 00
MIN 00
SEC
Blue Sea System Blue Sea Cable Cap 1 x 1.25 Stud Red #4004 $5.61 $6.60
Blue Sea System 4004 ComponentsBlue Sea Cable Cap 1 x 1.25 Stud Red #4004Normalized SKU: 4004UPC Code: 632085040048
Sold out -17% sale
Paneltronics Analog DC Ammeter 0-50DCA 1-1/2
00
DAYS 00
HRS 00
MIN 00
SEC
Paneltronics Paneltronics Analog DC Ammeter 0-50DCA 1-1/2" #289-054 $41.57 $49.88
Paneltronics 289-054 ComponentsAnalog Meter0-50DCA1-1/2" Window mount Easy to read compatible scale plates True RMS DC voltmeters accurately read inverter modified square wave output (ABYC E-11.11.3.2.3.) DC voltmeters can be installed on panelboards that are permanently connected to motors or generators (ABYC E-11.11.3.2.) Accuracy ± 2% PANELTRONICS DC AMMETER 1 1/2" 0-50 DC AMP ANALOGNormalized SKU: 289054UPC Code: 60229030021
Sold out -15% sale
Blue Sea System Qualifies for Free Shipping Blue Sea Label Air Compressor #8063-0025
00
DAYS 00
HRS 00
MIN 00
SEC
Blue Sea System Blue Sea Label Air Compressor #8063-0025 $1.70 $2.00
Blue Sea System 8063-0025 Components8063-0025 Large Format Air Compressor LabelFeatures: Large Format Label for Air Compressor Normalized SKU: 80630025
-22% sale
Newmar Qualifies for Free Shipping Newmar Temp Sensor #TCS 12/24
00
DAYS 00
HRS 00
MIN 00
SEC
Newmar Newmar Temp Sensor #TCS 12/24 $154.26 $195.92
Newmar TCS 12/24 Components"Temperature Compensation Sensor, Model TCS 12/24 -5 mV per cell? C 25' cable"Normalized SKU: TCS12/24
-20% sale
Newmar Qualifies for Free Shipping Newmar Cable Feed-Thru #RA-2
00
DAYS 00
HRS 00
MIN 00
SEC
Newmar Newmar Cable Feed-Thru #RA-2 $80.14 $99.49
Newmar RA-2 Components"RA Series Right Angle Waterproof Feed-Thru Fittings Route cables at 90° through vertical and horizontal surfaces with wall hugging low profile design that keeps cable secured close to the surface reducing intrusion with personnel or other equipment / cables. Molded of nylon, the Sculpted shape has no sharp edges and provides radiused 90° feed-thru bend in cables without damage. Easy installation: slide silicone compression rings on cable, mount base piece with waterproof gasket then attach sealing end cap to create an IP 65 waterproof seal. Note cable must be routed without end connector attached. Three models to accommodate wide range of cable diameters. Model Cable Diameter Range (Inches) Dimensions (Inches) RA-1 0.1 - 0.25 2.17 x 1.65 x 0.63 RA-2 0.27 - 0.35 3.23 x 2.44 x 0.95 RA-3 0.39 - 0.47 3.23 x 2.44 x 0.95 "Normalized SKU: RA2
Sold out -20% sale
Newmar Qualifies for Free Shipping Newmar Cable Feed-Thru #RA-3
00
DAYS 00
HRS 00
MIN 00
SEC
Newmar Newmar Cable Feed-Thru #RA-3 $86.96 $107.95
Newmar RA-3 Components"RA Series Right Angle Waterproof Feed-Thru Fittings Route cables at 90° through vertical and horizontal surfaces with wall hugging low profile design that keeps cable secured close to the surface reducing intrusion with personnel or other equipment / cables. Molded of nylon, the Sculpted shape has no sharp edges and provides radiused 90° feed-thru bend in cables without damage. Easy installation: slide silicone compression rings on cable, mount base piece with waterproof gasket then attach sealing end cap to create an IP 65 waterproof seal. Note cable must be routed without end connector attached. Three models to accommodate wide range of cable diameters. Model Cable Diameter Range (Inches) Dimensions (Inches) RA-1 0.1 - 0.25 2.17 x 1.65 x 0.63 RA-2 0.27 - 0.35 3.23 x 2.44 x 0.95 RA-3 0.39 - 0.47 3.23 x 2.44 x 0.95 "Normalized SKU: RA3
Sold out -17% sale
Newmar Not Qualified for Free Shipping Newmar 1.25
00
DAYS 00
HRS 00
MIN 00
SEC
Newmar Newmar 1.25" Waterproof #WPF-2 $11.14 $13.30
Newmar WPF-2 ComponentsWaterproof Fittings For complete waterproof assembly (IP68) use these compression fittings. Retaining nut secures fitting to enclosers, compression hub creates waterproof seal around wires. Various sizes are available in a wide range of cable diameters. Model Cable Diameter Range Mounting Hole Diameter EX Enclosure Knock-Out Size Ref. WPF-1 .2?-.47? .91" (22.5 mm) PG-16 WPF-2 .35?-.71? 1.14" (29.0 mm) PG-21 WPF-3 .55?-.98? 1.48" (37.5 mm) PG-29 Normalized SKU: WPF2
Sold out -22% sale
Newmar Qualifies for Free Shipping Newmar Temperature Probe #TP
00
DAYS 00
HRS 00
MIN 00
SEC
Newmar Newmar Temperature Probe #TP $183.57 $233.14
Newmar TP Components"Newmar TP Temperature Probe Temperature probe with 25' cable Model: TP The TP Temperature Compensation Probe is designed exclusively for use with the following NEWMAR Phase Three charger models: PT-32-30, PT-24-45F, PT-24-95F. (All other models use temp sensor model TCS-12/24.)"Normalized SKU: TP
-20% sale
Newmar Qualifies for Free Shipping Newmar Junction Box #PX-3
00
DAYS 00
HRS 00
MIN 00
SEC
Newmar Newmar Junction Box #PX-3 $85.26 $105.84
Newmar PX-3 Components"Waterproof Junction Boxes Ideal for making wiring connections above or below decks, even in areas subject to occasional spray Similar to BX Series junction boxes, but made from rugged, non-corrosive, high impact polypropylene Snap-on cover provides watertight seal ""Universal"" cut-to-fit (see diagram) graduated diameter cable entries accommodate wide cable range Multiple position connector strips with ""captive"" screw compression wire terminals installed - meets ABYC standards Multiple knockouts provided for conduit access (in addition to cable entries) IEC Waterproof Rating: IP54 - ""Water projected in jets against the enclosure from any direction shall have no harmful effects."" Specifications Model PX-1 PX-2 PX-3 Number of Connector Strips 1 2 2 Positions per Strip 6 6 9 Max Wire Gauge 16 16 16 Number of Cable Entry Ports 5 7 7 Number of Cable Entries Installed 3 7 7 Spare Cable Entries Provided 2 0 0 Cable Diameter Range (inches) .14-.81 .14-.81 .14-1.0 Cable Diameter Range (mm) 3.5-20.5 3.5-20.5 3.5-25.5 Box Size Inches 2.95 x 2.95 x 1.66 3.35" x 3.35 x 1.66 4.45 x 4.45 x 2.29 Box Size Centimeters 7.5 x 7.5 x 4.2 8.5 x 8.5 x 4.2 11.3 x 11.3 x 5.8 "Normalized SKU: PX3UPC Code: 007-3003-0
-17% sale
Newmar Qualifies for Free Shipping Newmar Junction Box #PX-2
00
DAYS 00
HRS 00
MIN 00
SEC
Newmar Newmar Junction Box #PX-2 $70.56 $84.67
Newmar PX-2 Components"Waterproof Junction Boxes Ideal for making wiring connections above or below decks, even in areas subject to occasional spray Similar to BX Series junction boxes, but made from rugged, non-corrosive, high impact polypropylene Snap-on cover provides watertight seal ""Universal"" cut-to-fit (see diagram) graduated diameter cable entries accommodate wide cable range Multiple position connector strips with ""captive"" screw compression wire terminals installed - meets ABYC standards Multiple knockouts provided for conduit access (in addition to cable entries) IEC Waterproof Rating: IP54 - ""Water projected in jets against the enclosure from any direction shall have no harmful effects."" Specifications Model PX-1 PX-2 PX-3 Number of Connector Strips 1 2 2 Positions per Strip 6 6 9 Max Wire Gauge 16 16 16 Number of Cable Entry Ports 5 7 7 Number of Cable Entries Installed 3 7 7 Spare Cable Entries Provided 2 0 0 Cable Diameter Range (inches) .14-.81 .14-.81 .14-1.0 Cable Diameter Range (mm) 3.5-20.5 3.5-20.5 3.5-25.5 Box Size Inches 2.95 x 2.95 x 1.66 3.35" x 3.35 x 1.66 4.45 x 4.45 x 2.29 Box Size Centimeters 7.5 x 7.5 x 4.2 8.5 x 8.5 x 4.2 11.3 x 11.3 x 5.8 "Normalized SKU: PX2
-22% sale
Newmar Qualifies for Free Shipping Newmar Power Conditioner #PC-25
00
DAYS 00
HRS 00
MIN 00
SEC
Newmar Newmar Power Conditioner #PC-25 $156.78 $199.13
Newmar PC-25 Components"Noise Filters The interference or electronic "noise" generated by alternators, ignition systems, motors, etc., can render a vehicle or vessel's radio or other electronic equipment virtually useless. This interference takes the form of popping or static on radios or audio gear and garbled images or "hash" on video displays. These specialized filters can be used singly or in combination to attenuate conducted line noise, either at the affected equipment or at the noise source. Filtered Frequencies Model 150A: 70 kHz - 100 MHz Models PC-10 and PC-25: Audio - 200 MHz Filter Features: Heavy duty aluminum construction Operate on 6-48 VDC systems Integral mounting flanges for secure installation Brass stud connectors on alternator filters accommodate high current cables and terminals Color coded wire leads on all other models make in-line installation easy Model Rating Installation Location   Size   Weight H W D 150-A 150 Amp In the alternator output lead 3.25" 5.75" 3.25" 3 lbs. (8.2 14.6 8.2cm 1.4Kg.) PC-10 10 Amp In the + and - power leads close to affected equipment 1.25" 4.25" 3" 1 lb. (3.2 10.8 8.2cm .5Kg.) PC-25  25 Amp Same as PC-10 2" 4.25" 3.25" 2 lbs. (5.1 10.8 8.2cm .9 Kg.) "Normalized SKU: PC25
-20% sale
Newmar Qualifies for Free Shipping Newmar Feed Thru #DX-3
00
DAYS 00
HRS 00
MIN 00
SEC
Newmar Newmar Feed Thru #DX-3 $83.56 $103.73
Newmar DX-3 Components" DX Series Feed-Thru Waterproof Fittings Provided with solid neoprene cable gland, installer drills holes and slits as required to accommodate cable with or without factory installed connector. Multiple cables may be passed through a single fitting. Similar to CCX Series except installer drills holes in seal to accommodate cable(s) Multiple cables may be routed through a single fitting   Model Drill-Thru Aperture Max. Connector Diameter DX-3 1.65? 1.65? "Normalized SKU: DX3

Frequently Asked Questions

First Choice Marine is an online marine retailer carrying a diverse line of marine parts and accessories and related items from industry-respected and demanded manufacturers and suppliers. Through our diverse distributor network, we are able to access over 150,000 items, including our current site inventory, new products being added, and special order items. If you need it on your boat... we are your one-stop shop!

Yes, we offer FREE Shipping on most orders over $149 to US-48*.

Each product displays a shipping status message, just above the item price. Below is the meaning for each of these codes.

  • Qualifies for Free Shipping: This item qualifies for free shipping when the order is $149+
  • Qualifies for Free Ground Shipping: This item qualifies for free ground shipping when the order is $149+.
  • Oversized - Not Qualified for Free Shipping: This item is too large/heavy to qualify for free shipping
  • Hazardous Item - Not Qualified for Free Shipping: This item is hazardous and does not qualify for free shipping
  • Truck Freight - Not Qualified for Free Shipping: This item has to be shipped via truck freight. Please contact us for a quote
  • In-Store Pickup Only: This item can only be picked up in our Grain Valley, MO retail store

Below the price of the item, on the product page, there is a message indicating the availability of the product.

The quantity on hand is updated as inventory events happen and matches what we have available. If you have urgent needs and we are close to what you need, contact us, and we can confirm stock.

We offer a hassle-free return policy. If you're not completely satisfied with your purchase, you can return it within 30 days for a full refund or exchange.

If you need to return an item, please follow the guidelines here so we can process a prompt refund and assist you in finding the correct item.

Free Shipping

On most orders $149+ to the continental 48 US states.

Secure Shopping

Fast, secure checkout with a variety of payment methods.

Shop with confidence

25+ years serving the marine industry.

Support center

Need help? Contact us via live chat, phone, or email.

© 2026 First Choice Marine.