5 1/8" OD Flanges | McMaster-Carr

Clear All

	Pipe Size Pipe Size

3/4

	Thread Type Thread Type

NPT

	Type Type


Flange	Adapter

Cap

	Connection Style Connection Style

	For Pipe Schedule For Pipe Schedule

XXH

160

Any

	Pressure Class Pressure Class

1500

	Material Material

Steel

	Finish Finish

Black Coated

	Flanged Connection Surface Flanged Connection Surface

	Raised

	For Use With For Use With

	System of Measurement System of Measurement

Inch

	Bolt Circle Diameter Bolt Circle Diameter

3 1/2"

	Number of Bolt Holes Number of Bolt Holes

	Maximum Steam Pressure Maximum Steam Pressure

3,200 psi @ 300° F

	Shape Shape

	Straight
	Cap/Plug

	Maximum Pressure Maximum Pressure

3,700 psi @ 72° F

	Flange OD Flange OD	Show

5 1/8"

	Flange OD Flange OD	Hide

	Gender Gender

Female

	Fabrication Fabrication

Forged

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Dash Size Dash Size

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	For Pipe Material For Pipe Material

Steel

View catalog pages (2)

Forward

How can we improve?

5 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Extreme-Pressure Steel Unthreaded Pipe Flanges

For excellent strength in extreme-pressure applications, choose these heavy duty Pressure Class 1500 flanges. Bolt two same-size flanges together with a gasket (sold separately) to create an access point in a pipe line. They are for noncorrosive environments.

Butt-weld flanges are also known as weld-neck flanges; the flange neck has a beveled end that, when flush to pipe, creates a trough for a strong weld.

Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.

Socket-connect flanges have an internal stop that supports the pipe when welding and prevents the pipe from sliding all the way through.

Cap flanges are also known as blind flanges.

For technical drawings and 3-D models, click on a part number.

Butt-Weld Flanges

Front

Raised Surface on Back

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class : 1500
Specifications Met: MSS SP-6, MSS SP-25, ASTM A105, ASME B16.5
Certification: Material Certificate with Traceable Lot Number and Test Report
Fittings: Use Class 6000 steel

					Bolt Hole
Pipe Size	Dash Size	Wall Thick.	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	For Pipe Schedule		Each
3/4	12	0.154"	5 1/8"	3/4"	7/8"	4	3 1/2"	3,700 psi @ 72° F	3,200 psi @ 300° F	80	0000000	0000000

Slip-On Weld Flanges

Front

Raised Surface on Back

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class : 1500
Specifications Met: See table
Certification: Material Certificate with Traceable Lot Number and Test Report
Fittings: Use Class 6000 steel

				Bolt Hole
Pipe Size	Dash Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	For Pipe Schedule	Specifications Met		Each
3/4	12	5 1/8"	3/4"	7/8"	4	3 1/2"	3,700 psi @ 72° F	3,200 psi @ 300° F	Any	ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6	0000000	0000000

Socket-Connect Flanges

Front

Raised Surface on Back

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class : 1500
Specifications Met:
3 and 4 Pipe Sizes: ASTM A105
All other sizes: ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6
Certification: Material Certificate with Traceable Lot Number and Test Report
Fittings: Use Class 6000 steel

				Bolt Hole
Pipe Size	Dash Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	For Pipe Schedule		Each
3/4	12	5 1/8"	3/4"	7/8"	4	3 1/2"	3,700 psi @ 72° F	3,200 psi @ 300° F	80	0000000	0000000

Caps

Front

Raised Surface on Back

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class : 1500
Specifications Met: MSS SP-6, MSS SP-25, ASTM A105, ASME B16.5
Certification: Material Certificate with Traceable Lot Number and Test Report
Fittings: Use Class 6000 steel

				Bolt Hole
Pipe Size	Dash Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	For Pipe Schedule		Each
3/4	12	5 1/8"	3/4"	7/8"	4	3 1/2"	3,700 psi @ 72° F	3,200 psi @ 300° F	Any	0000000	0000000

High-Pressure Steel Threaded Pipe Flanges

Front

Raised Surface on Back

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 1500
Specifications Met:
1/2 to 2 Pipe Sizes: ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6
All other sizes: ASTM A105
Pipe Nipples and Pipe: Use Schedule 160 or XXH steel
Fittings: Use Class 3000 or 6000 iron and steel

Also known as Pressure Class 1500 flanges, these have the strength to handle high pressures. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are for use in noncorrosive environments.

For technical drawings and 3-D models, click on a part number.

				Bolt Hole
Pipe Size	Dash Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	Material		Each
NPT
3/4	12	5 1/8"	3/4"	7/8"	4	3 1/2"	3,700 psi @ 72° F	3,200 psi @ 300° F	Black-Coated Steel	0000000	0000000