Shopping Cart

Your cart is empty.

Your cart is empty.

Master Cylinder Side Plugs Kit - 9/16'-18 & 1/2'-20 Inverted Flare Nut Port Block Off

5.0 Write Review
Free shipping on orders over $29.99

$12.99

$ 6 .99 $6.99

In Stock
  • Complete port blocking solution - Includes both 9/16"-18 and 1/2"-20 inverted flare nuts for unused master cylinder ports
  • OEM-style fitment - Direct replacement that matches G--M specifications
  • Durable steel construction - Silver-finished nuts provide reliable sealing and corrosion resistance
  • Universal G--M application - Works with most 4-port master cylinders requiring port blocking
  • Essential brake system component - Prevents fluid leaks and maintains proper brake system pressure


This G--M master cylinder side plug kit provides professional-quality port blocking for unused brake line ports. The set includes both 9/16"-18 and 1/2"-20 inverted flare nuts (reference #LSOT001600) made from durable steel. Perfect for custom brake setups or master cylinder modifications, these plugs ensure a secure, leak-free seal.


Recommended Products
A-Premium Brake Master Cylinder with Reservoir and Cap Compatible with Dodge Vehicles - D250 1986-1993, D350 1984-1993, W200 1970-1980, W250/W350 1981-1993, W300 1979-1980 - Replaces# 4112654

$64.99

$ 31 .99 $31.99

4.6
Select Option
Electric Brake Booster Vacuum Pump for EEP GRAND CHEROKEE 3.0L 3.6L 2016-2019, Dodge Durango 2016-2019,Replaces# 4581954AB, 4581954AA, UP32

$113.91

$ 44 .99 $44.99

4.7
Select Option
Tasutterr Brake Bleeder, Brake Bleeder Hose - One Way Check Valve Tube Bleeding Tool Kit for Car Motorcyle Clutch, Brake Bleeder Hose One Way Valve

$15.99

$ 6 .99 $6.99

4.7
Select Option
JEENDA L25419 A51976 Brake Master & Slave Cylinder Kit for Case 450B 450C 480 480B 480C 480D 580 580B 580C 850B 850C 850D 855C (2)

$104.90

$ 43 .99 $43.99

4.3
Select Option
Allstar Performance ALL46404-18 18' 4 AN Brake Line

$23.48

$ 10 .99 $10.99

4.3
Select Option
10 Set Hose Olive Insert, Brake Oil Pipe Olive Insert Set, Disc Brakes Hoses Olives Connector Insert Suitable for Hydraulic Brake Hose Replacement Parts

$6.99

$ 2 .99 $2.99

4.5
Select Option
ACDelco Professional 18J4329 Front Passenger Side Hydraulic Brake Hose Assembly

$37.00

$ 18 .99 $18.99

4.7
Select Option
Brake Master Cylinder with Reservoir No.4720133130 for Toyota Camry 1995-2001 Hydraulic Master Cylinder Silver Tone,White Aluminum Alloy,Plastic 1 Pc

$29.99

$ 15 .99 $15.99

4.3
Select Option