Buttress Threads | McMaster-Carr

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27 Products

Thread Adapters for Drum Openings


Polypropylene BSPP Thread	Polypropylene M56 Threads	Polypropylene M60 Threads

Polypropylene M64 Threads	Polypropylene M70 Threads	Stainless Steel M56, M60, M64, M70, and BSPP

Convert drum openings with metric or BSPP threads to a 2 NPT pipe size.

M64 Threads—M64 inlet thread size is also known as Buttress threads.

M70 Threads—M70 inlet thread size is also known as Mauser threads.

	Inlet		Outlet
	Pipe/Thread Size	Gender	Pipe Size	Gender	Seal Material	Max. Temp., ° F		Each
Polypropylene



		2 BSPP	Male	2 NPT	Female	EPDM	125	0000000	000000


		M56 Metric	Male	2 NPT	Female	EPDM	125	0000000	00000
		M60 Metric	Male	2 NPT	Female	EPDM	125	0000000	00000
		M64 Metric	Male	2 NPT	Female	EPDM	125	000000	00000
		M70 Metric	Male	2 NPT	Female	EPDM	125	000000	00000


		316 Stainless Steel



				2 BSPP	Male	2 NPT	Female	—	250	0000000	000000


				M56 Metric	Male	2 NPT	Female	—	250	0000000	000000
				M60 Metric	Male	2 NPT	Female	—	250	0000000	000000
				M64 Metric	Male	2 NPT	Female	—	250	0000000	000000
				M70 Metric	Male	2 NPT	Female	—	250	0000000	000000

Drum Plugs

Style D

For installation and removal of these plugs, use drum-plug wrenches.

Polyethylene

Style D

Style D—Style D have a M64 thread size, which is also known as Buttress threads.

Drum Plug Caps—Drum-plug caps (sold separately) fit over drum plugs to provide dust protection as well as evidence of tampering. They have a breakaway seal and are for one-time use.

Drum Plugs											Drum Plug Caps			Drum Plug Crimpers
Style	Drum Plug Type	Color	Seal Material	Pipe/Thread Size	Gender	Max. Temp., ° F	Features	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.		Each
D	Standard	White	EPDM	M64 Metric	Male	125	3/4 NPSM Faucet Knockout	5	0000000	000000	10	0000000	000000	0000000	0000000

Polypropylene

Style D

Style D—Style D have a M64 thread size, which is also known as Buttress threads.

Drum Plug Caps—Drum-plug caps (sold separately) fit over drum plugs to provide dust protection as well as evidence of tampering. They have a breakaway seal and are for one-time use.

Drum Plugs										Drum Plug Caps			Drum Plug Crimpers
Style	Drum Plug Type	Color	Pipe/Thread Size	Gender	Max. Temp., ° F	Features	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.		Each
D	Standard	White	M64 Metric	Male	125	3/4 NPSM Faucet Knockout	5	0000000	000000	10	0000000	000000	0000000	0000000

Metal Drum Faucets


Style A	Style B	Style C	Style D

All of these faucets are primarily used on drums, but can also be used on tanks, carboys, and other containers. If your drum has a 2" Buttress or Mauser thread, use drum thread adapters to attach drum faucets with pipe size 2 NPT threads.

Style C—Style C have a locknut with a rubber gasket that allows you to position the spigot in any direction. The locknut also provides a tight seal, even on drums with oversized or damaged threads.

			Inlet
	Style	Wetted Parts Material	Pipe Size	Thread Type	Gender	Outlet OD	Lock Type	For Max. Shackle Dia.	Features		Each
Iron Body



		A	Iron, Brass	3/4	NPT	Male	3/4"	Padlockable	5/16"	—	000000	000000


		A	Iron, Brass	1 1/2	NPT	Male	1 1/2"	Padlockable	5/16"	—	000000	00000
		A	Iron, Brass	2	NPT	Male	1 3/4"	Padlockable	5/16"	—	000000	00000
		A	Iron, Brass	3	NPT	Male	2 3/8"	—	—	—	000000	000000
		B	Iron, Brass	2	NPT	Male	1 3/4"	Padlockable	5/16"	—	0000000	00000
		B	Iron, Brass	3	NPT	Male	2 3/8"	—	—	—	0000000	000000
		B	Iron, Brass	4	NPT	Male	4"	—	—	—	000000	000000
		C	Iron, Brass	2	NPT	Male	1 3/4"	Padlockable	5/16"	Swivel Spigot	0000000	00000


		Aluminum Body



				D	Aluminum, Brass	3/4	NPT	Male	3/4"	Padlockable	5/16"	—	0000000	00000


				D	Aluminum, Brass	2	NPT	Male	1 3/4"	Padlockable	5/16"	—	0000000	00000

Plastic Drum Faucets

Style C

Primarily used on drums, these faucets can also be used on tanks, carboys, and other containers.

Style C—Style C can be used with a thread adapter to connect to a drum with a 2” Buttress or Mauser thread.

				Inlet
	Style	Wetted Parts Material	Color	Pipe Size	Thread Type	Gender	Outlet OD	Max. Temp., ° F		Each
Polyethylene Body



		C	EPDM, Polyethylene	Brown	2	NPT	Male	2 1/4"	140	000000	000000

Drum Faucets for Viscous Liquids

Style B

Use these faucets with fluids at least as thick as motor oil.

Style B—Style B can be used with a thread adapter to connect to a drum with a 2” Buttress or Mauser thread.

			Inlet
	Style	Wetted Parts Material	Pipe Size	Thread Type	Gender	Outlet OD	Certification		Each
Brass Body



		B	Brass, 304 Stainless Steel, PTFE	2	NPT	Male	1 5/8"	FM Approved	000000	0000000

Replacement Drum Faucet Gate Blades