Midland Industries
Midland Black 150# Malleable Iron Merchant Coupling
- Availability:
- Allow 1-2 Days to Ship
- Weight:
- 0.00 LBS
Description
Midland Black 150# Malleable Iron Merchant Coupling
Midland Black 150# Malleable Iron Merchant Couplings provide a straight female-threaded connection between two sections of compatible male-threaded pipe, nipples, or fittings. These equal-size couplings feature female pipe threads on both ends and are designed for use in black threaded piping systems.
Available in sizes from 1/8" through 6", with an additional 1-1/4" Schedule 80 option, these merchant couplings are suited for industrial, agricultural, construction, petroleum transfer, commercial, maintenance, and general piping applications.
Product Highlights
- Midland Industries merchant coupling
- Black malleable iron construction
- 150 lb fitting family
- Female pipe thread x female pipe thread
- Equal-size straight-through connection
- Connects compatible male threaded pipe, nipples, and fittings
- Black finish
- Standard sizes from 1/8" through 6"
- Separate 1-1/4" Schedule 80 merchant coupling option available
Available Sizes
| Size | Midland Part Number | Connection |
|---|---|---|
| 1/8" | 65770 | 1/8" FPT x 1/8" FPT |
| 1/4" | 65771 | 1/4" FPT x 1/4" FPT |
| 3/8" | 65772 | 3/8" FPT x 3/8" FPT |
| 1/2" | 65773 | 1/2" FPT x 1/2" FPT |
| 3/4" | 65774 | 3/4" FPT x 3/4" FPT |
| 1" | 65775 | 1" FPT x 1" FPT |
| 1-1/4" | 65776 | 1-1/4" FPT x 1-1/4" FPT |
| 1-1/2" | 65777 | 1-1/2" FPT x 1-1/2" FPT |
| 2" | 65778 | 2" FPT x 2" FPT |
| 2-1/2" | 65779 | 2-1/2" FPT x 2-1/2" FPT |
| 3" | 65780 | 3" FPT x 3" FPT |
| 4" | 65781 | 4" FPT x 4" FPT |
| 5" | 65782 | 5" FPT x 5" FPT |
| 6" | 65783 | 6" FPT x 6" FPT |
Technical Specifications
| Manufacturer | Midland Industries |
|---|---|
| Product Type | Merchant Coupling |
| Material | Malleable Iron |
| Finish | Black |
| Product Family | Black 150# Malleable Fittings |
| Connection Type | FPT x FPT |
| Connection Configuration | Female Threaded x Female Threaded |
| Configuration | Straight, Equal Size |
| Standard Size Range | 1/8" through 6" |
| Additional Option | 1-1/4" Schedule 80 - Part 69776 |
Construction Details
Black Malleable Construction
- Durable metal fitting construction
- Black exterior finish
- Designed for compatible threaded piping systems
- Straight coupling body
- Suitable for commercial and industrial applications
Female Threaded Connections
- Female pipe threads on both ends
- Equal nominal connection size on each end
- Accepts compatible male threaded pipe and nipples
- Designed for straight-line pipe joining
- No reduction in nominal connection size
Merchant Coupling Configuration
A merchant coupling is used to join two compatible male-threaded piping components in a straight line. The Midland merchant coupling uses equal-size female threaded connections on both ends.
- Straight-through fitting configuration
- FPT connection on both ends
- Equal-size inlet and outlet
- Connects threaded pipe, nipples, and fittings
- Available across a broad range of nominal pipe sizes
Equal-Size FPT x FPT Connections
Each standard merchant coupling in this listing has the same nominal female pipe thread size on both ends. Select the coupling size to match the nominal male pipe thread being joined.
- 1/2" coupling connects 1/2" male threaded components
- 1" coupling connects 1" male threaded components
- 2" coupling connects 2" male threaded components
- No reducing connection is incorporated into these couplings
- Use a reducing coupling when two different nominal pipe sizes must be joined
Standard vs. 1-1/4" Schedule 80 Option
This listing includes both the standard 1-1/4" merchant coupling, part 65776, and the separately identified 1-1/4" Schedule 80 black merchant coupling, part 69776.
- 65776 - Standard 1-1/4" Black Merchant Coupling
- 69776 - 1-1/4" Schedule 80 Black Merchant Coupling
- Both are listed separately to prevent incorrect ordering
- Confirm which construction is required before selecting the 1-1/4" option
Common Applications
Industrial & Mechanical
- Industrial piping systems
- Plant maintenance
- Mechanical piping
- Equipment connections
- Utility piping
- General process piping
General Piping Applications
- Agricultural piping
- Construction applications
- Petroleum transfer systems
- Commercial piping
- Shop and facility piping
- Threaded pipe assemblies
How to Select the Correct Merchant Coupling
- Confirm Size: Select a coupling with the same nominal pipe size as the male threaded components being joined.
- Confirm Connection: These couplings use female pipe threads on both ends.
- Confirm Configuration: Merchant couplings provide a straight, equal-size connection.
- Confirm Material: Verify black malleable iron is suitable for the piping system and service.
- 1-1/4" Selection: Confirm whether the standard 65776 or Schedule 80 69776 version is required.
Installation & Selection Considerations
- Verify nominal pipe size and thread compatibility before installation.
- Use thread sealant or thread tape appropriate for the piping media and application.
- Avoid cross-threading or excessive tightening during assembly.
- Support adjoining piping so excessive mechanical loading is not placed on the coupling.
- Confirm the complete piping system is suitable for the intended pressure, temperature, and service.
Need help confirming the correct pipe size, threaded connection, standard versus Schedule 80 construction, or fitting style? The GetPipe.com team can help make sure you select the right Midland Black Malleable Iron Merchant Coupling for your piping system.
Email the GetPipe.com Team Visit Quick SupportFrequently Asked Questions
What is a merchant coupling used for?
A merchant coupling joins two compatible male-threaded pipe sections, nipples, or fittings in a straight line.
What type of connections does this coupling have?
The standard Midland merchant couplings use female pipe thread connections on both ends, commonly identified as FPT x FPT.
Does a merchant coupling reduce pipe size?
No. The standard merchant couplings in this listing have the same nominal connection size on both ends.
What sizes are included?
This listing includes standard merchant couplings from 1/8" through 6", plus a separate 1-1/4" Schedule 80 option.
What is the standard 1-1/4" Midland part number?
The standard 1-1/4" Black Merchant Coupling is Midland part number 65776.
What is Midland part number 69776?
Midland part 69776 is identified as a 1-1/4" Schedule 80 Black Merchant Coupling.
Is a merchant coupling the same as a reducing coupling?
No. A standard merchant coupling joins equal nominal pipe sizes. A reducing coupling is designed to connect two different pipe sizes.
Important Ordering Notes
- This listing is for Midland Black Merchant Couplings.
- Standard connection style is FPT x FPT.
- Standard couplings use equal nominal sizes on both ends.
- Standard sizes range from 1/8" through 6".
- 65776 is the standard 1-1/4" option.
- Select the required size and construction before ordering.
