Commerceinstruments Best Selling Products

With just a snap, quickly install these fittings or valves on hot or cold water lines! Unique, patented, quick connection system significantly redu...

Sea-Tech Quick Connect Male Thread Tee Fitting. 1/2 inch CTS x 1/2 inch NPT, bulk. Sea-Tech connectors utilize a collet, cap and O-ring system for ...

Manchester Tank 1220TCTH.4 Propane Tank; DOT Portable Tank; 40 Pounds Capacity; White; With OPD (Overfill Prevention Device) Valve; Empty Mancheste...

Water Heater Manifold Outlet; For Suburban Water Heater DSI Models SW6D/ SW10D (After Serial Number 953401118); Fits Unit With A Pilot Suburban Man...

AquaLock 3545-10CP Fitting Plug/ Fitting Cap; 3545 Series; 1/2 Inch Female Quick Connect Copper Tube End; White; Polysulfone (High Performance Ther...

Marshall Products ME1328Propane Adapter Fitting; Low Pressure Manometer Adapter; 3/8 Inch Outside Diameter; Brass; Single For over 30 years Marshal...

Performance Tool W1156 Dispensing Pump; Use To Changing Oil/ Inflating Beach Balls/ Siphoning Fluids; With 48 Inch x 1/2 Inch Diameter Clear View H...

Stromberg Carlson Replacement Manual Crank Handle for Fifth Wheel Landing Gear. Feel secure in knowing these parts are the most widely used in the ...

GPS200 - NMEA 2000 GPS Antenna/ReceiverMaretron's GPS200 provides reliable position fixes 10 times per second, accurate boat speed four times per s...

Fuel Flow Sensor - 25-500 LPH/6.6-132 GPHFeatures: Operating Temperature: -40°C to 80°C (-40°F to 176°F) Storage Temperature: -65°C to 170°C (-85...

Maretron NM-CF-NF Marine Network Cable Connector; Used To Tap Into Trunk Line For Adding Drop Connection; Mini 5-Pin Male Left x Micro 5-Pin Female...

Maretron NF-NM4P-NF Marine Network Cable Connector; Used To Provide Two Power Inputs Permitting Doubled Power Provision For Devices; Mini Powertap ...

Maretron NM4P-05 Marine Network Cable; For Use With NF-NM4P-NF Mini Powertap Connector; 5 Meter Length; Yellow PVC; IP67 Waterproof; 9 Ampere; 600 ...

; Use To Monitor And Measure Battery Temperature Or Other Under-Bolt Temperature Maretron's products are designed to the open industry NMEA 2000 ® ...

Power Cord Adapter; For Providing 15 Amps To RV From 30 Amp Standard Power Outlets; Pigtail Type; Polarized For Use With RV Only; Non Locking; With...

Power Cord Adapter; Connects 50 Amp RV Power Cords To A 15 Amp Power Source; Outdoor Use Only; With Watertight Connection; With Extra Wide Grip Han...

Power Inlet Port; Manual Power Disconnect; 30 Amp Power; 125 Volt AC; Stainless Steel; With Cap Marinco s...

Power Cord; Power Supply Cord; 4-Pin Male Plug End And Female Socket End; For Providing 50 Amps To RV From 50 Amp Standard Power Outlet; From Strai...

New from ParkPower by Marinco, the Right Angle Cordset is designed specifically for RV applications. It is an ideal way to connect in tight spaces....

Power Inlet Port; Manual Power Disconnect; 50 Amp Power; 125/ 250 Volt AC; White; Contour Shape; Flame Resistant UL94V0 Plastic Rear Enclosure/ Sta...

Power Cord; RVEEL; Power Supply Cord; 3 Prong Male Plug On Park Side And Female Connector On RV Side; With Power Indicator Light; 30 Amp; 25 Foot; ...

Power Cord; RVEEL; Power Supply Cord; 3 Prong Male Plug On Park Side And Female Connector On RV Side; With Power Indicator Light; 50 Amp; 25 Foot L...

Power Cord Adapter Lock Ring; Use To Protect Connection From Moisture; Fits 20 Amp/ 30 Amp ParkPower ® Power Cord Adapters; Threaded; With Collar M...

Power Conversion Kit; Converts 30 Amp Hard Wired RV Power Hook-Up To Detachable Power Hook-Up; 30 Amp/ 125 Volt; With 30 Amp Contoured Power Inlet/...

6-56® Multi-Purpose Marine Lubricant - 9oz Long lasting, superior lubrication that resists water and salt spray. Drives out moisture that can cause...

6-56® Multi-Purpose Marine Lubricant - 1 GallonLong lasting, superior lubrication that resists water and salt spray. Drives out moisture that can c...

6-56® Multi-Purpose Marine Lubricant - 11oz Long lasting, superior lubrication that resists water and salt spray. Drives out moisture that can caus...

Marine Aerospace Protectant - 1 GallonNo other product provides this much protection for your boat and water gear. Use Aerospace Protectant to keep...

Marine Flagship Wash N Wax32ozFlagship Premium Wash-N-Wax uses an exclusive blend of carnauba and synthetic polymers to add a valuable layer of wax...

CRC Marykate 06006MARINE FORMULA 656

Heavy Duty Silicone - 9oz Clean, odorless, highly water resistant. Fights corrosion. Lubricates wood, nylon, rubber, metals, canvas and leather. El...

CRC Industries 06102 Electronic Cleaner; QD ®; Use To Clean Circuit Breakers/ Sensitive Electronic Components/ Contacts/ Fans/ Motors/ Electronics/...

Biocide 3237MARINE SHOCKER

CRC Industries 06037 Multi Purpose Grease; Lithium Grease; White; Single; 16 Ounce Aerosol Can As one of the world’s leading manufacturers of ch...

Rugged ABS base with LED light engine assembled directly into reflectorized acrylic lens. LED light engine consists of 2 LED lights that are mounte...

Rugged ABS base with LED light engine assembled directly into reflectorized acrylic lens. LED light engine consists of 2 LED lights that are mounte...

Optronics MC32RS Clearance Light; MC32 SERIES; Incandescent; Oblong; 4 Inch Length x 2 Inch Width x 1-1/8 Inch Depth; Red Lens; White ABS Housing; ...

Carefree Of Colorado KIT, MARQUEE TBLR MOTOR,3-SLOT KIT, MARQUEE TBLR MOTOR,3-SLOT

Marshall Excelsior MEGR-230-25QDP Propane Regulator; Black QCC Inlet x Female Quick Disconnect (QD); Single Stage; Without Hose; Retail Packaging; ...

Propane Regulator; Excela-Flo; 1/4 Inch Inverter Flare X 3/8 Inch FPT; Two Stage; 225000 BTU I Stage/ 150000 BTU II Stage; Without Hose; Zinc Powde...

Excela-Flo compact integral 2 stages regulator MEC * 175,000 BTU/Hr * Inlet Connection: HN Excess Flow POL. * Type: Two stages * Max. Inlet Pressu...

The Stay-Longer Propane Kits are designed to give you new flexibility on how you use your LP-Gas. You can stay longer by hooking up auxiliary LP-Ga...

Propane Adapter Fitting; Tee Style; 1 Inch-20 FNPT Inlet x 1 Inch-20 MNPT Outlet; Brass; Single; With Plastic Clamshell For over 30 years Marshall ...

Propane Pressure Test Kit; 0 To 35WC (Water Column); 3 Foot Rubber Hose; With Gauge/ Case/ Hose/ Hose Barb Connector For over 30 years Marshall Exc...