Stub End Joints | McMaster-Carr

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	Pipe Size Pipe Size

1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
4
6
8
10
12

	Type Type	Show

	Stub End

	Type Type	Hide


Connector	Adapter

Union	Pipe

Expansion Joint	Reducer

Reducing Adapter	Flange

Clamp	Cap

Bushing	Plug

Rotating Joint	Locknut

Stub End	Repair Clamp

Nut	Outlet

Saddle Tap	Trap

	Material Material

Stainless Steel

Steel

	Connection Style Connection Style

Butt Weld

Flanged

	Schedule Schedule


10	40

	For Pipe Material For Pipe Material

Stainless Steel

Steel

	For Pipe Schedule For Pipe Schedule


40	10

	System of Measurement System of Measurement

Inch

	Flange OD Flange OD

	Shape Shape

	Straight

	For Use With For Use With

	Connection Type Connection Type

	Pipe

	ID ID

	OD OD

	Wall Thickness Wall Thickness

	Specifications Met Specifications Met

ASME

ASTM

MSS

	Length Length

2 1/2"

3 1/2"

10"

	Construction Construction

Seamless

Welded

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

DFARS Specialty Metals
COTS-Exempt

	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

	Weight Weight

96 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.

Standard-Wall Butt-Weld Stainless Steel Unthreaded Pipe Fittings

Also known as Schedule 40 fittings, these have thicker walls than our thin-wall stainless steel unthreaded butt-weld fittings. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow.

304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

Stub-end straight adapters are used with flanges. Slide a flange onto the stub end and weld the stub end to pipe (not the flange). Since the flange isn’t welded to the pipe, it can be disconnected easily, which creates an access point for frequent cleaning and inspecting.

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

Stub-End Straight Adapters

Straight Adapter with Flange

Straight Adapter

For Use With: Air, Natural Gas, Oil, Water
Specifications Met: ASME B16.9, ASTM A403, MSS SP-43
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

Fittings					Flanges
Pipe Size	Wall Thick.	Construction		Each		Each
304/304L Stainless Steel
1/2	0.109"	Welded	000000000	000000	000000000	000000
3/4	0.113"	Welded	000000000	00000	000000000	00000
1	0.133"	Welded	000000000	00000	000000000	00000
1 1/4	0.14"	Welded	000000000	00000	000000000	00000
1 1/2	0.145"	Welded	000000000	00000	000000000	00000
2	0.154"	Welded	000000000	00000	000000000	00000
2 1/2	0.203"	Welded	000000000	00000	000000000	000000
3	0.216"	Welded	000000000	00000	000000000	000000
4	0.237"	Welded	000000000	00000	000000000	000000
6	0.28"	Welded	000000000	000000	000000000	000000
8	0.322"	Welded	000000000	000000	000000000	000000
316/316L Stainless Steel
1/2	0.109"	Welded	000000000	00000	000000000	00000
3/4	0.113"	Welded	000000000	00000	000000000	00000
1	0.133"	Welded	000000000	00000	000000000	00000
1 1/4	0.14"	Welded	000000000	00000	000000000	00000
1 1/2	0.145"	Welded	000000000	00000	000000000	00000
2	0.154"	Welded	000000000	00000	000000000	000000
2 1/2	0.203"	Welded	000000000	00000	000000000	000000
3	0.216"	Welded	000000000	00000	000000000	000000
4	0.237"	Welded	000000000	00000	000000000	000000
6	0.28"	Welded	000000000	000000	000000000	000000
8	0.322"	Welded	000000000	000000	000000000	000000

Thin-Wall Butt-Weld Stainless Steel Unthreaded Pipe Fittings

Also known as Schedule 10 fittings, these are thin and lightweight. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow.

304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

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

Stub-End Straight Adapters

Straight Adapter with Flange

Straight Adapter

For Use With: Air, Natural Gas, Oil, Water
Specifications Met: ASME B16.9, ASTM A403, MSS SP-43
Pipe: Use Schedule 10 stainless steel

Straight Adapters						Flanges
Pipe Size	Wall Thick.	Flange OD	Construction		Each		Each
304/304L Stainless Steel
1/2	0.083"	1 3/8"	Welded	000000000	000000	000000000	000000
3/4	0.083"	1 11/16"	Welded	000000000	00000	000000000	00000
1	0.109"	2"	Welded	000000000	00000	000000000	00000
1 1/4	0.109"	2 1/2"	Welded	000000000	00000	000000000	00000
1 1/2	0.109"	2 7/8"	Welded	000000000	00000	000000000	00000
2	0.109"	3 5/8"	Welded	000000000	00000	000000000	00000
2 1/2	0.12"	4 1/8"	Welded	000000000	00000	000000000	000000
3	0.12"	5"	Welded	000000000	00000	000000000	000000
4	0.12"	6 3/16"	Welded	000000000	00000	000000000	000000
6	0.134"	8 1/2"	Welded	000000000	000000	000000000	000000
8	0.148"	10 5/8"	Welded	000000000	000000	000000000	000000
10	0.134"	12 3/4"	Welded	000000000	000000	000000000	000000
12	0.156"	15"	Welded	000000000	000000	000000000	000000
316/316L Stainless Steel
1/2	0.083"	1 3/8"	Welded	000000000	00000	000000000	00000
3/4	0.083"	1 11/16"	Welded	000000000	00000	000000000	00000
1	0.109"	2"	Welded	000000000	00000	000000000	00000
1 1/4	0.109"	2 1/2"	Welded	000000000	00000	000000000	00000
1 1/2	0.109"	2 7/8"	Welded	000000000	00000	000000000	00000
2	0.109"	3 5/8"	Welded	000000000	00000	000000000	000000
2 1/2	0.12"	4 1/8"	Welded	000000000	00000	000000000	000000
3	0.12"	5"	Welded	000000000	00000	000000000	000000
4	0.12"	6 3/16"	Welded	000000000	00000	000000000	000000
6	0.134"	8 1/2"	Welded	000000000	000000	000000000	000000
8	0.148"	10 5/8"	Welded	000000000	000000	000000000	000000
10	0.134"	12 3/4"	Welded	000000000	000000	000000000	000000
12	0.156"	15"	Welded	000000000	000000	000000000	000000

Standard-Wall Butt-Weld Steel Unthreaded Pipe Fittings

Butt-weld fittings allow for a smooth connection that provides maximum flow. They have beveled ends that, when flush to pipe, create a trough for a strong, permanent weld. Fittings are also known as Schedule 40. They are for use in noncorrosive environments.

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

Stub-End Straight Adapters

Straight Adapter with Flange

Straight Adapter

For Use With: Air, Steam, Oil, Water, Natural Gas
Specifications Met: ASTM A234, ASME B16.9
Pipe Nipples and Pipe: Use Schedule 40 steel
Flanges: Use Class 150 steel

Straight Adapters					Flanges
Pipe Size	Wall Thick.	Construction		Each		Each
1/2	0.109"	Seamless	000000000	000000	000000000	000000
3/4	0.113"	Seamless	000000000	00000	000000000	00000
1	0.133"	Seamless	000000000	00000	000000000	00000
1 1/4	0.14"	Seamless	000000000	00000	000000000	00000
1 1/2	0.145"	Seamless	000000000	00000	000000000	00000
2	0.154"	Seamless	000000000	00000	000000000	00000
2 1/2	0.203"	Seamless	000000000	000000	000000000	00000
3	0.216"	Seamless	000000000	000000	000000000	00000
4	0.237"	Seamless	000000000	000000	000000000	00000
6	0.28"	Seamless	000000000	000000	000000000	00000
8	0.322"	Seamless	000000000	000000	000000000	000000