ASTM B221 Pipe Plugs | McMaster-Carr

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42 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Low-Pressure Aluminum Threaded Pipe Fittings

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a _1/4-turn past hand tight.

Hex-Drive Plugs

Male

Anodized 2011 Aluminum—Anodized and powder-coated fittings have a decorative matte black finish.

	Dash Size	Construction	Pressure Class	Material	Color	Max. Pressure @ Temp.	Mil. Spec.		Each
NPT Male



	1/16	—	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T361	00000


	1/8	02	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T362	0000
	1/4	04	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T363	0000
	3/8	06	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T364	0000
	1/2	08	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T365	00000
	3/4	12	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T366	00000
	1	16	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T367	00000
	1 1/4	20	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T368	00000


	BSPT Male



			1/8	02	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T369	0000


			1/4	04	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T371	0000
			3/8	06	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T372	0000
			1/2	08	Solid	150	Anodized 2011 Aluminum	Black	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T373	00000

External-Hex-Drive Plugs

Male

	Construction	Pressure Class	Body Shape	Material	Max. Pressure @ Temp.	Mil. Spec.		Each
NPT Male



	1/16	Solid	150	Hex	6061 Aluminum	150 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T378	00000

External-Hex-Drive Plugs with Gasket

Male

	Dash Size	Construction	Pressure Class	Body Shape	Material	Max. Pressure @ Temp.	Gasket Material	Mil. Spec.		Each
UNF Male



	10-32	—	Solid	150	Hex	6061 Aluminum	150 psi @ 72° F	Buna-N	Fed. Spec. QQ-A-200/8	3867T379	00000


	7/16"-20	06	Solid	150	Hex	6061 Aluminum	150 psi @ 72° F	Buna-N	Fed. Spec. QQ-A-200/8	3867T382	0000
	9/16"-18	04	Solid	150	Hex	6061 Aluminum	150 psi @ 72° F	Buna-N	Fed. Spec. QQ-A-200/8	3867T381	0000
	3/4"-16	08	Solid	150	Hex	6061 Aluminum	150 psi @ 72° F	Buna-N	Fed. Spec. QQ-A-200/8	3867T383	0000


	Metric Male



			M3 × 0.5 mm	—	Solid	150	Hex	6061 Aluminum	150 psi @ 72° F	Buna-N	Fed. Spec. QQ-A-200/8	3867T374	0000


			M6 × 1 mm	—	Solid	150	Hex	6061 Aluminum	150 psi @ 72° F	Buna-N	Fed. Spec. QQ-A-200/8	3867T375	0000
			M10 × 1.25 mm	—	Solid	150	Hex	6061 Aluminum	150 psi @ 72° F	Buna-N	Fed. Spec. QQ-A-200/8	3867T376	0000
			M12 × 1.25 mm	—	Solid	150	Hex	6061 Aluminum	150 psi @ 72° F	Buna-N	Fed. Spec. QQ-A-200/8	3867T377	0000

180° Bend Connectors

Image of Product. Front orientation. Pipe Traps. Low-Pressure Aluminum Threaded Pipe Fittings.

180° bend connectors are also known as U-bends.

	Material	Max. Pressure @ Temp.	Shape		Each
NPT Female



	1/2	356 Aluminum	150 psi @ 72° F	180° Bend	44705K479	000000


	3/4	356 Aluminum	150 psi @ 72° F	180° Bend	44705K481	00000
	1	356 Aluminum	150 psi @ 72° F	180° Bend	44705K482	00000

Locknuts

NPSL Thread—NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.

	Finished Material	Max. Pressure @ Temp.		Each
NPSL Female



	1/4	6061 Aluminum	150 psi @ 72° F	44705K412	00000


	3/8	6061 Aluminum	150 psi @ 72° F	44705K413	0000
	1/2	356 Aluminum	150 psi @ 72° F	44705K414	0000
	3/4	356 Aluminum	150 psi @ 72° F	44705K415	00000
	1	356 Aluminum	150 psi @ 72° F	44705K416	00000
	1 1/4	356 Aluminum	150 psi @ 72° F	44705K417	00000

High-Pressure Aluminum Threaded Pipe Fittings

Also known as Pressure Class 3000 fittings, these have the highest pressure rating of all the aluminum pipe fittings we offer. They are lightweight with good corrosion resistance.

Caps

Female

	Pressure Class	Material	Max. Pressure @ Temp.	Mil. Spec.		Each
NPT Female



	1/4	3000	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T81	000000


	1/2	3000	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T82	00000
	3/4	3000	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T83	00000
	1	3000	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T84	00000

External-Hex-Drive Plugs

Male

	Construction	Pressure Class	Body Shape	Material	Max. Pressure @ Temp.	Mil. Spec.		Each
NPT Male



	1/4	Solid	3000	Hex	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T65	000000


	1/2	Solid	3000	Hex	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T66	00000
	3/4	Solid	3000	Hex	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T67	00000
	1	Solid	3000	Hex	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T68	00000

External-Square-Drive Plugs

Male

	Construction	Pressure Class	Body Shape	Material	Max. Pressure @ Temp.	Mil. Spec.		Each
NPT Male



	1/4	Solid	3000	Square	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T55	000000


	1/2	Solid	3000	Square	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T56	00000
	3/4	Solid	3000	Square	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T57	00000
	1	Solid	3000	Square	6061 Aluminum	3,000 psi @ 72° F	Fed. Spec. QQ-A-200/8	3867T58	00000