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Hardin Marine

1" NPT Inlet/Outlet Sea Pump Adapter
Your Price:
$35.99

1" NPT Inlet/Outlet Sea Pump Adapter

625-4150

1" NPT Inlet/Outlet Sea Pump Adapter

These components are designed to assist in the plumbing of your engine when using the Hardin Marine Multi-Stage sea pumps. A wide range of configurations can be created by using different inlet and outlet adapters.


1" NPT Stainless Steel Pipe Plug
Your Price:
$17.99

1" NPT Stainless Steel Pipe Plug

540-223000

1" NPT Stainless Pipe Plug

1" NPT Stainless Steel Water Shut-Off Valve
Your Price:
$79.99

1" NPT Stainless Steel Water Shut-Off Valve

620-913310

1" Stainless Steel Full-Port Ball Valve

FNPT by FNPT Threaded Ends, 2-Piece Body, Full-Port Design with lockable handle, 2000 PSI rated, 316 Stainless Steel Body, Teflon (PTFE) Seals & Seats.


1" NPT Standard Swirl-Away High Performance Sea Strainer
Your Price:
$529.99

1" NPT Standard Swirl-Away High Performance Sea Strainer

620-913202

  • 316L premium stainless steel construction.
  • Cone shaped screen basket provides even greater straining area.
  • Basket is removable for easy cleaning.
  • O-Ring sealed Lexan lid (not cheap plastic)
  • Lid is removed by simple one hand grip knob. No wingnuts!
  • Lid will withstand 100 PSI pressure spikes.
  • Dual 1" NPT inlets and outlets.
  • 3/4" NPT pressure relief port.
  • 360 degree swivel mounting bracket for maximum mounting flexibility.
  • Due to differences in mounting surfaces, hardware for mounting strainer not included.
  • See Additional Info for extended product details.
  • Find Replacement Parts Here

1" NPT  Stainless Steel Water Inlet Crossover
Your Price:
$169.99

1" NPT  Stainless Steel Water Inlet Crossover

410-1503

  • Constructed of 316L Stainless Steel.
  • Fits BBC applications.
  • 1" NPT inlet water crossover (allowing you to use a number of assorted fittings to adapt to your application).
  • Includes bolts and gaskets.

1" Stainless "Y" Style Fitting
Your Price:
$89.99

1" Stainless "Y" Style Fitting

420-910311

1" Stainless "Y" Style Fitting

These all stainless steel "Y" style water divider fittings arecommonly used when plumbing 4-port thermostat housing down to 2 hoses for wateroutlet to the exhaust manifold connection.


1.4 HP Chrome Mini Super Starter
Your Price:
$269.99

1.4 HP Chrome Mini Super Starter

620-5350

1.4 HP Chrome Mini Super Starter

This chrome plated high performance mini starter has been a leading choice of performance boaters. Top quality components along with a ball bearing design produces a starter that is durable even in hot temperature conditions. This starter is rated at 1.4 HP of cranking power which is nearly 40% stronger than traditional OEM Delco style starters

USCG Approved (SAE J1171)


1/16" NPT x -4 AN Valve Spring Oiler Fittings
Your Price:
$12.99

1/16" NPT x -4 AN Valve Spring Oiler Fittings

755-8427

These stainless steel fittings are designed to thread into the end the valve spring oilers (755-8482). This allows you to adapt to standard -4 AN fittings for plumbing. Sold Each.


1/16" x 3/4" Cotter Pin - Stainless
Your Price:
$1.49

1/16" x 3/4" Cotter Pin - Stainless

620-29139

1/16" x 3/4" Cotter Pin - Stainless

Bend prongs outward to secure. Also known as split pins, they have one prong slightly longer than the other so they’re easy to open.

Type 316 and 18-8 stainless steel may be mildly magnetic. Type 316 pins are more corrosion resistant than 18-8 stainless steel pins.


1/2 X 5/8 X 5/8 Stainless Steel Tee
Your Price:
$18.99

1/2 X 5/8 X 5/8 Stainless Steel Tee

540-160109

1/2 X 5/8 X 5/8 Stainless Steel Tee

1/2" NPT on the Post. Dual 5/8" Push-On hose fittings on the Tee. Typically used in thermostat plumbing.

1/2" Left Hand Male Rod End
Your Price:
$41.99

1/2" Left Hand Male Rod End

135-5050L

1/2" Left Hand Male Rod End

These rod ends are all stainless steel


1/2" Marine Fuel Line Hose
Your Price:
$3.99

1/2" Marine Fuel Line Hose

100-350-0126

Marine Fuel Line Hose 1/2" I.D.

This is true USCG approved marine grade fuel hose Don't take any chances with your investment Use only marine grade hose.

Fuel line hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


1/4" Marine Vent / Bilge Hose
Your Price:
$0.79

1/2" Marine Vent / Bilge Hose

100-150-0126

1/2" I.D Vent / Bilge Hose

This hose is commonly used for venting or bilge dump.

Vent / Bilge hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


1/2" NPT Stainless Steel Pipe Plug
Your Price:
$15.99

1/2" NPT Stainless Steel Pipe Plug

540-222998

316L Stainless Steel Fitting
1/2" NPT Pipe Plug

We Offer the most complete line of chrome plated brass and custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.


1/2" Right Hand Male Rod End
Your Price:
$41.99

1/2" Right Hand Male Rod End

135-5050R

1/2" Right Hand Male Rod End

These rod ends are all stainless steel


1/2" Stainless Eyelet
Your Price:
$21.99

1/2" Stainless Eyelet

950-42176

1/2" Stainless Eyelet

These are high grade stainless eyelets in 1/2" diameter. The eyelets can also be used on the transoms or bow of boats for tie downs or tow hooks. 3" of thread length.


1/2" Water Pressure Dump
Your Price:
$115.99

1/2" Stainless Steel In Line Pressure Relief Valve Water Dump

128-5015

This has to be one of the coolest and simplest stream lined inventions to come along in recent times. High water pressure spikes plague numerous boats and cause catastrophic engine damage. Until now your only option was an independent pressure relief valve that you then had to plumb to a water dump to discharge the water. Thanks to the Hardin Marine team they have taken the best high flow water valve design and integrated it into a common water dump.

These dumps feature a sleek design as well as unique wrench flats machined into the body aiding in assembly during a one person installation. Constructed from 316L stainless steel. This model provides a 1/2 NPT female thread allowing for any arrangement of possible fitting and hose connections. The unit features a stainless tulip style valve that is spring loaded. The units come preset at approximately 10psi.

  • 1-7/16" Flange Diameter
  • 1/4" Flange Height 
  • 1-1/8" Shaft Outside Diameter
  • 3" Overall Length
  • 1/2" NPT Internal Thread
  • Pre-set at Aprox. 10lb Pressure Relief, not adjustable.
  • Approx. Flow Rate (gallons per minute) 10 psi=7 GPM, 15 psi= 13 GPM, 20 psi=19 GPM

1/4" Cable End Quick Release Ball Joint, Stainless Steel
Your Price:
$17.99

1/4" Cable End Quick Release Ball Joint, Stainless Steel

620-29104

1/4" Cable End Quick Release Ball Joint, Stainless Steel for 43C Cables.

1/4" Marine Fuel Line Hose
Your Price:
$2.99

1/4" Marine Fuel Line Hose

100-350-0140

Marine Fuel Line Hose 1/4" I.D.

This is true USCG approved marine grade fuel hose Don't take any chances with your investment Use only marine grade hose.

Fuel line hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


1/4" Marine Vent / Bilge Hose
Your Price:
$0.60

1/4" Marine Vent / Bilge Hose

100-150-0140

1/4" I.D Vent / Bilge Hose

This hose is commonly used for venting or bilge dump.

Vent / Bilge hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


1/4" NPT Flexible Dipstick Kit
Your Price:
$27.99

1/4" NPT Flexible Dipstick Kit

620-910502

1/4" NPT Flexible Dipstick Kit

A unique flexible dipstick tube assembly allows easy access and a universalfit, making it easy to work around marine exhaust systems. The pan musthave a pipe thread provision to work with this dipstick.

20" Long Tube


1/4" NPT Stainless Steel Pipe Plug
Your Price:
$11.99

1/4" NPT Stainless Steel Pipe Plug

540-222996

1/4" NPT Stainless Steel Pipe Plugs


1/4"-28 Button Head Allen Bolt, 0.25" Long
Your Price:
$2.50

1/4"-28 Button Head Allen Bolt, 0.25" Long

900-25F025-BHS

1/4"-28 Button Head Allen Bolt, 0.25" Long, Coarse Thread.


1/8 NPT Brass Allen Plug
Your Price:
$2.30

1/8 NPT Brass Allen Plug

625-2021

1/8 NPT Brass Allen Plug


1/8" NPT Brass Pet Cock Drain
Your Price:
$3.95

1/8" NPT Brass Pet Cock Drain

900-1000

1/8" NPT Pet cock drain used on Cyclone Headers and other applications

10 Amp Mercury Style Circuit Breaker
Your Price:
$15.00

10 Amp Mercury Style Circuit Breaker

755-3509

10 Amp Mercury Style Circuit Breaker

These breakers are the most common marine units used on factory style as well as aftermarket marine engines and harnesses. Be careful not to exceed the original amperage rating of your existing harness.


10" Billet Aluminum Euro Style Grab Handle

Your Price:
$75.99

10" Billet Aluminum Euro Style Grab Handle

125-EH300 + Option(s)

10" Billet Aluminum Euro Style Handle - Each

We've got them - the latest in billet handles. These Euro StyledHandles feature smooth contoured shapes and edges. These units use thesame mounting holes as the traditional handles and vents so they areperfect fora new boat building project or they will retro-fit the traditionalhandles andvents manufactured by Hardin Marine.

*Note- These grab handles are 11-1/2" long with 10" bolt centers. Internal threads are 5/16-18"