Drum Bungs | McMaster-Carr

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46 Products

Drum Plugs

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

Plugs with PTFE seals stand up to corrosive chemicals such as nitric acid.

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

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.

Polyethylene Plastic

Drum Plugs												Crimp-On Drum Plug Caps			Crimping Tools for Drum Plug Caps
Style	Drum Plug Type	Color	Seal Material	Pipe/Thread Size	Gender	Max. Temp., °F	Opening Pressure Range	Features	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.		Each
A	Standard	White	__	3/4 NPSM	Male	125°	__	__	5	0000000	000000	10	0000000	000000	0000000	0000000
A	Pressure Relief, Vacuum Relief	White	__	3/4 NPSM	Male	125°	1 psi-4 psi	Vent	5	0000000	00000	10	0000000	00000	0000000	000000
B	Pressure Relief, Vacuum Relief	White	EPDM Rubber	2 NPSM	Male	125°	1 psi-4 psi	Vent	5	0000000	00000	10	0000000	00000	0000000	000000
C	Standard	White	__	2 NPSM	Male	125°	__	3/4 NPSM Faucet Knockout	5	0000000	00000	10	0000000	00000	0000000	000000
D	Standard	White	EPDM Rubber	M64 Metric	Male	125°	__	3/4 NPSM Faucet Knockout	5	0000000	00000	10	0000000	00000	0000000	000000

Polypropylene Plastic

Drum Plugs												Crimp-On Drum Plug Caps			Crimping Tools for Drum Plug Caps
Style	Drum Plug Type	Color	Seal Material	Pipe/Thread Size	Gender	Max. Temp., °F	Opening Pressure Range	Features	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.		Each
A	Standard	Gray	__	3/4 NPSM	Male	125°	__	__	5	0000000	000000	10	0000000	000000	0000000	0000000
A	Pressure Relief, Vacuum Relief	Gray	__	3/4 NPSM	Male	125°	1 psi-4 psi	Vent	5	0000000	00000	10	0000000	00000	0000000	000000
B	Pressure Relief, Vacuum Relief	White	EPDM Rubber	2 NPSM	Male	125°	1 psi-4 psi	Vent	5	0000000	00000	10	0000000	00000	0000000	000000
C	Standard	Gray	__	2 NPSM	Male	125°	__	3/4 NPSM Faucet Knockout	5	0000000	00000	10	0000000	00000	0000000	000000
D	Standard	White	__	M64 Metric	Male	125°	__	3/4 NPSM Faucet Knockout	5	0000000	00000	10	0000000	00000	0000000	000000

Zinc-Plated Steel

Drum Plugs									Snap-On Drum Plug Caps
Style	Drum Plug Type	Seal Material	Pipe Size	Gender	Opening Pressure Range	Features		Each	Pkg. Qty.		Pkg.
E	Standard	Buna-N Rubber	3/4 NPSM	Male	__	__	000000	00000	10	0000000	000000
E	Pressure Relief	Buna-N Rubber	3/4 NPSM	Male	0.5 psi-4 psi	Vent	0000000	0000	10	0000000	00000
E	Vacuum Relief	Buna-N Rubber	3/4 NPSM	Male	0.5 psi-4 psi	Vent	0000000	0000	10	0000000	00000
F	Standard	Buna-N Rubber	2 NPSM	Male	__	__	0000000	0000	10	0000000	00000
G	Pressure Relief	Buna-N Rubber	2 NPSM	Male	13 psi-15 psi	Vent	0000000	00000	10	0000000	00000

316 Stainless Steel

Drum Plugs							Snap-On Drum Plug Caps
Style	Drum Plug Type	Seal Material	Pipe Size	Gender		Each	Pkg. Qty.		Pkg.
H	Standard	Buna-N Rubber	3/4 NPT	Male	0000000	000000	10	0000000	000000
H	Standard	PTFE Plastic	2 NPSM	Male	00000000	00000	10	0000000	00000
H	Standard	PTFE Plastic	3/4 NPSM	Male	00000000	00000	10	0000000	00000
J	Standard	Buna-N Rubber	2 NPT	Male	0000000	00000	10	0000000	00000

Drum Plug Gaskets

Add a gasket or replace one that's worn out to ensure a tight seal.

For 3/4 Pipe Size
Material	Max. Temp., °F	Pkg. Qty.		Pkg.
Polyethylene Plastic	350°	50	0000000	000000
Buna-N Rubber	450°	100	0000000	00000
EPDM Rubber	450°	100	0000000	00000
For 2 Pipe Size
Polyethylene Plastic	350°	50	0000000	00000
Buna-N Rubber	450°	50	0000000	00000
EPDM Rubber	450°	50	0000000	00000
For M64 Thread Size
EPDM Rubber	200°	10	0000000	00000

Drum Vents

Prevent drum failure by using these vents to release pressure and vacuum buildup caused by draining liquids and sudden temperature changes. In case of fire, a flame arrester prevents flashback into the drum.

Style D has a removable cap so it can be used as a fill opening.

Style E comes with two carbon filters. The filter traps 99% of vapors.

	Activation
Style	Pressure Relief	Vacuum Relief	Seal Material	Flame Arrester Material	Pipe Size	Gender	Opening Pressure Range	Specifications Met		Each
For Horizontal Drums
316 Stainless Steel
A	Automatic	Manual	Fluoroelastomer Rubber	304 Stainless Steel	2 NPT	Male	3 psi-8 psi	FM Approved	0000000	0000000
Brass
A	Automatic	Manual	Buna-N Rubber	Brass	2 NPT	Male	3 psi-8 psi	FM Approved	0000000	00000
For Vertical Drums
Polyethylene Plastic
B	Automatic	Automatic	Buna-N Rubber	Zinc-Plated Steel	2 NPT	Male	3 psi-8 psi	FM Approved	0000000	00000
B	Automatic	Automatic	Buna-N Rubber	304 Stainless Steel	2 NPT	Male	3 psi-8 psi	FM Approved	0000000	000000
Brass
C	Automatic	Automatic	Buna-N Rubber	Brass	2 NPT	Male	3 psi-8 psi	FM Approved	000000	000000
D	Automatic	Automatic	Buna-N Rubber	Brass	2 NPT	Male	3 psi-8 psi	FM Approved	0000000	000000
E	Automatic	Automatic	Buna-N Rubber	Brass	2 NPT	Male	3 psi-8 psi	FM Approved	0000000	000000

Locking Fill Caps for Drums

Male

Female

Prevent tampering with the contents of your drum while allowing access for filling.

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

Iron
Pipe Size	Gender	Dia.	Ht.	Lock Type	Lock Included	For Max. Shackle Dia.		Each
2 NPT	Male	3 1/8"	2 1/4"	Padlockable	No	7/16"	0000000	000000
2 NPT	Female	3 1/8"	1 3/8"	Padlockable	No	5/16"	0000000	00000
3 NPT	Female	4 1/2"	2"	Padlockable	No	1/2"	0000000	00000
4 NPT	Female	5 1/4"	2 1/4"	Padlockable	No	1/2"	0000000	000000

Drum Locks

Padlockable locks for closed-head drums replace the plugs on 3/4" and 2" drum openings. Made of brass, they're non-sparking and resist corrosion in wet environments. Slide the bar through the hole in each plug and lock with a padlock (not included).

For Closed-Head Drums

Padlockable for Closed-Head Drums

Lock Type	Material	Seal Material	For Pipe Size	Thread Type	Lock Included	For Max. Shackle Dia.		Each
Padlockable	Brass	Buna-N Rubber	3/4, 2	NPT	No	5/16"	0000000	0000000