Bung Caps | McMaster-Carr

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41 Products

Drum Plugs


Style A	Style B	Style C	Style D	Style E

Style F	Style G	Style H	Style J

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

Polyethylene


Style A	Style B	Style C	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	Opening Pressure Range, psi	Features	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.		Each
A	Pressure Relief, Vacuum Relief	White	—	3/4 NPSM	Male	125	1 to 4	Vent	5	9030T81	000000	10	8983T31	00000	8983T44	0000000
A	Standard	White	—	3/4 NPSM	Male	125	—	—	5	9030T61	0000	10	8983T31	0000	8983T44	000000
B	Pressure Relief, Vacuum Relief	White	EPDM	2 NPSM	Male	125	1 to 4	Vent	5	9030T82	00000	10	8983T32	00000	8983T45	000000
C	Standard	White	—	2 NPSM	Male	125	—	3/4 NPSM Faucet Knockout	5	9030T63	00000	10	8983T32	00000	8983T45	000000
D	Standard	White	EPDM	M64 Metric	Male	125	—	3/4 NPSM Faucet Knockout	5	9030T64	00000	10	8983T32	00000	8983T45	000000

Polypropylene


Style A	Style B	Style C	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	Opening Pressure Range, psi	Features	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.		Each
A	Pressure Relief, Vacuum Relief	Gray	—	3/4 NPSM	Male	125	1 to 4	Vent	5	8983T35	000000	10	8983T31	00000	8983T44	0000000
A	Standard	Gray	—	3/4 NPSM	Male	125	—	—	5	8983T41	00000	10	8983T31	0000	8983T44	000000
B	Pressure Relief, Vacuum Relief	White	EPDM	2 NPSM	Male	125	1 to 4	Vent	5	8983T36	00000	10	8983T32	00000	8983T45	000000
C	Standard	Gray	—	2 NPSM	Male	125	—	3/4 NPSM Faucet Knockout	5	8983T43	00000	10	8983T32	00000	8983T45	000000
D	Standard	White	—	M64 Metric	Male	125	—	3/4 NPSM Faucet Knockout	5	8983T37	00000	10	8983T32	00000	8983T45	000000

Zinc-Plated Steel


Style E	Style F	Style G

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
Style	Drum Plug Type	Seal Material	Pipe/Thread Size	Gender	Opening Pressure Range, psi	Features		Each	Pkg. Qty.		Pkg.
E	Pressure Relief	Buna-N	3/4 NPSM	Male	0.5 to 4	Vent	8983T55	00000	10	8983T26	00000
E	Standard	Buna-N	3/4 NPSM	Male	—	—	8983T9	0000	10	8983T26	0000
E	Vacuum Relief	Buna-N	3/4 NPSM	Male	0.5 to 4	Vent	8983T53	0000	10	8983T26	0000
F	Standard	Buna-N	2 NPSM	Male	—	—	8983T11	0000	10	8983T29	00000
G	Pressure Relief	Buna-N	2 NPSM	Male	13 to 15	Vent	8983T13	00000	10	8983T28	00000

316 Stainless Steel

Style H

Style J

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

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
Style	Drum Plug Type	Seal Material	Pipe/Thread Size	Gender		Each	Pkg. Qty.		Pkg.
H	Standard	Buna-N	3/4 NPT	Male	8983T16	000000	10	8983T27	00000
H	Standard	PTFE	3/4 NPSM	Male	8983T612	00000	10	8983T27	0000
J	Standard	Buna-N	2 NPT	Male	8983T17	00000	10	8983T29	00000
J	Standard	PTFE	2 NPSM	Male	8983T611	00000	10	8983T28	00000

Drum Vents

Style D

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

		Activation
	Style	Pressure Relief	Vacuum Relief	Seal Material	Flame Arrester Material	Pipe Size	Gender	Opening Pressure Range, psi	Certification		Each
For Vertical Drums







				Brass

				D	Automatic	Automatic	Buna-N	Brass	2 NPT	Male	3 to 8	FM Approved	3988T15	0000000

Locking Drum Plug Caps


Male	Female

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

	Gender	Dia.	Ht.	Lock Type	Lock Included	For Max. Shackle Dia.		Each
Iron



	2 NPT	Male	3 1/8"	2 1/4"	Padlockable	No	7/16"	4906K21	000000


	2 NPT	Female	3 1/8"	1 3/8"	Padlockable	No	5/16"	4906K23	00000
	3 NPT	Female	4 1/2"	2"	Padlockable	No	1/2"	4906K27	00000
	4 NPT	Female	5 1/4"	2 1/4"	Padlockable	No	1/2"	4906K29	000000

Drum Plug Gaskets

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

	Max. Temp., ° F	Pkg. Qty.		Pkg.
For 3/4 Pipe Size



	Polyethylene	350	50	8983T25	000000


	Buna-N	450	100	8983T24	00000
	EPDM	450	100	8983T51	00000


	For 2 Pipe Size



			Polyethylene	350	50	8983T23	00000


			Buna-N	450	50	8983T33	00000
			EPDM	450	50	8983T52	00000


			For M64 Thread Size



					EPDM	200	10	8983T56	00000

Drum Locks

For Closed-Head Drums


Padlockable	Keyed Lock

Padlockable—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).

Keyed Lock—Keyed locks for closed-head drums fit over standard drum plugs and caps. Use the included keys to secure.

Lock Type	Material	Seal Material	For Pipe Size	Thread Type	Lock Included	For Max. Shackle Dia.	No. of Locks	No. of Keys Included		Each
Padlockable	Brass	Buna-N	3/4, 2	NPT	No	5/16"	—	—	1900A43	0000000
Keyed	Zinc Alloy	—	3/4, 2	—	Yes	—	2	2	1900A11	00000