Square Couplings | McMaster-Carr

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System of Measurement

Post Width

Material

Component

Inside Width

Height

Thickness

Post Depth

Overall Width

Inside Length

Opening Width

Target Mounting Depth

1 1/4"

1 1/2"

Width

Weight Capacity

Less than 10,000 lb.

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Overall Depth

RoHS

REACH

Fitting Type

Cap Type

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Depth

Fitting Connection

Latch Type

30 Products

Stacking Caps and Targets

Stacking Caps

Targets

Weld these caps and targets to the ends of posts to create stackable shelving and racking systems. The stacking caps fit into the targets and provide the stability you need for stacking structures on top of one another. They can also be used to replace damaged caps and targets in existing systems.

	For Post		Target Mounting		Overall
	Wd.	Dp.	Wd.	Dp.	Wd.	Dp.	Ht.		Each
Steel







				Stacking Caps

				1 1/2"	1 1/2"	—	—	—	—	1 1/2"	8815N13	00000


				1 3/4"	1 3/4"	—	—	—	—	2"	8815N15	0000
				2"	2"	—	—	—	—	1 7/8"	8815N11	0000
				2 1/2"	2 1/2"	—	—	—	—	2"	8815N12	0000




						Targets

						1 1/2", 2"	1 1/2", 2"	1 1/2"	1 1/4"	4"	4"	1 7/16"	8815N21	0000


						2 1/2"	2 1/2"	1 1/2"	1 1/2"	5"	5"	1 5/8"	8815N22	0000

Square Quick Links

Ideal for securing straps, the flat sides prevent bunching and slipping better than pear- or oval-shaped links. They're also good for making connections with multiple cables or ropes. Thread them closed by hand or with an open-end wrench. Make sure the nut completely covers the threads to handle the maximum weight capacity.

Warning: Not for overhead lifting.

Zinc-Plated Steel—The most economical option. These strong and durable links resist occasional exposure to moisture.

Highly Corrosion-Resistant 316 Stainless Steel—These links won't degrade when exposed to harsh weather, salt water, and most chemicals.

				Zinc-Plated Steel			Highly Corrosion-Resistant 316 Stainless Steel
Thk.	Opening Wd.	Inside Lg.	Inside Wd.	Wt. Cap., lb.		Each	Wt. Cap., lb.		Each



	3/32"	5/32"	15/16"	11/16"	80	33785T41	00000	200	33785T61	000000


	1/8"	3/16"	1 1/16"	7/8"	100	33785T42	0000	300	33785T62	00000
	5/32"	7/32"	1 1/4"	1"	200	33785T43	0000	400	33785T63	00000
	3/16"	1/4"	1 1/2"	1 1/8"	300	33785T44	0000	700	33785T64	00000
	1/4"	9/32"	1 11/16"	1 1/4"	500	33785T45	0000	900	33785T65	00000
	9/32"	11/32"	1 15/16"	1 5/16"	800	33785T46	0000	1,300	33785T66	00000
	5/16"	3/8"	2 5/32"	1 7/16"	1,200	33785T47	0000	1,600	33785T67	00000
	3/8"	7/16"	2 3/8"	1 9/16"	1,500	33785T48	00000	2,100	33785T68	00000
	7/16"	1/2"	2 11/16"	1 11/16"	1,900	33785T49	00000	2,700	33785T69	00000
	1/2"	5/8"	3 1/16"	1 15/16"	2,400	33785T51	00000	3,800	33785T71	00000
	9/16"	11/16"	3 1/2"	2 1/4"	3,900	33785T52	00000	5,400	33785T72	000000


	5/8"	3/4"	4 1/16"	2 1/2"	4,800	33785T53	00000	6,900	33785T73	000000