U-Pins | McMaster-Carr

	Pin Diameter Pin Diameter

	Capacity Capacity

Less than 10,000 lbs.

10,000 to 19,999 lbs.

20,000 to 29,999 lbs.

30,000 to 39,999 lbs.

40,000 lbs. or greater

	Pin Type Pin Type

	Screw
	Safety
	Captive Locking Screw

	Opening Width Opening Width

	Material Material

Steel

Stainless Steel

	Finish Finish

Galvanized

Black Oxide

	Application Application

For Lifting

Not for Lifting

	Thickness Thickness

	Inside Width Inside Width

	Inside Length Inside Length

	Specifications Met Specifications Met

ASME

Fed. Spec.

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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114 Products

Screw-Pin Shackles—For Lifting

Screw the pin into position by hand for quick installation and removal. They're for use in low-vibration applications where the shackle remains stationary. Also known as anchor and bow shackles, the wide body provides room to attach multiple connectors.

Black-oxide steel shackles have a dark surface color.

Galvanized steel shackles have a thick coating for corrosion resistance.

316 stainless steel shackles have excellent resistance to salt water and chemicals.

Note: Capacities listed are for vertical lifting only. As the lift angle changes from vertical, the amount of weight the shackle can lift is significantly reduced.

Black-Oxide Steel
Thick.	Opening Wd.	Pin Dia.	Inside Lg.	Inside Wd.	Capacity, lbs.	Fabrication	Pin Type	Specifications Met		Each
1/4"	15/32"	5/16"	1 1/8"	3/4"	1,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/16"	17/32"	3/8"	1 1/4"	15/16"	1,500	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	0000
3/8"	21/32"	7/16"	1 7/16"	1 1/8"	2,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	0000
7/16"	23/32"	1/2"	1 11/16"	1 5/16"	3,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1/2"	13/16"	5/8"	1 15/16"	1 1/2"	4,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/8"	1 1/16"	3/4"	2 1/2"	1 7/8"	6,500	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/4"	1 1/4"	7/8"	3"	2"	9,500	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/8"	1 7/16"	1"	3 1/4"	2 5/8"	13,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1"	1 11/16"	1 1/8"	3 3/4"	2 3/4"	17,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
Galvanized Steel
3/16"	13/32"	1/4"	29/32"	19/32"	600	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	0000
1/4"	1/2"	5/16"	1 5/32"	25/32"	1,100	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	0000
5/16"	17/32"	13/32"	1 1/4"	13/16"	1,500	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/8"	11/16"	15/32"	1 15/32"	1 1/32"	2,200	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/16"	3/4"	1/2"	1 23/32"	1 3/16"	3,300	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1/2"	13/16"	21/32"	1 29/32"	1 5/16"	4,400	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/8"	1 1/16"	3/4"	2 13/32"	1 23/32"	7,100	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/4"	1 1/4"	29/32"	2 13/16"	2"	10,400	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/8"	1 15/32"	1"	3 5/16"	2 9/32"	14,300	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1"	1 23/32"	1 5/32"	3 3/4"	2 23/32"	18,700	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1 1/8"	1 13/16"	1 1/4"	4 1/4"	2 15/16"	20,900	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/4"	2 1/32"	1 13/32"	4 23/32"	3 1/4"	26,400	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 3/8"	2 1/4"	1 1/2"	5 1/4"	3 21/32"	29,700	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/2"	2 7/16"	1 21/32"	5 21/32"	3 1/2"	34,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 3/4"	2 31/32"	2"	7"	4 3/4"	50,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
2"	3 9/32"	2 1/4"	7 15/32"	5 1/2"	70,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
2 1/2"	4 1/8"	2 3/4"	10 1/2"	7 1/4"	110,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000000
Galvanized Alloy Steel
3/8"	11/16"	15/32"	1 13/32"	1"	4,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/16"	23/32"	1/2"	1 11/16"	1 3/16"	5,200	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1/2"	27/32"	21/32"	1 31/32"	1 13/32"	6,600	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/8"	1 1/16"	3/4"	2 7/16"	1 21/32"	10,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/4"	1 9/32"	29/32"	2 27/32"	1 29/32"	14,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/8"	1 15/32"	1"	3 5/16"	2 1/16"	19,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1"	1 3/4"	1 5/32"	3 3/4"	2 17/32"	25,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1 1/8"	1 27/32"	1 1/4"	4 1/32"	2 11/16"	30,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1 1/4"	2 1/32"	1 13/32"	4 21/32"	2 29/32"	36,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/2"	2 7/16"	1 21/32"	5 21/32"	3 1/2"	50,000	Forged	Screw	ASME B30.26	0000000	000000
1 5/8"	2 21/32"	1 3/4"	6 1/8"	4 1/8"	58,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 3/4"	2 31/32"	2"	7"	4 3/4"	68,000	Forged	Screw	ASME B30.26	0000000	000000
2"	3 9/32"	2 1/4"	7 15/32"	5 1/2"	86,000	Forged	Screw	ASME B30.26	0000000	000000
316 Stainless Steel
3/16"	13/32"	1/4"	27/32"	19/32"	650	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	0000
1/4"	1/2"	5/16"	1 1/8"	3/4"	1,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	0000
5/16"	17/32"	13/32"	1 7/32"	13/16"	1,300	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/8"	11/16"	15/32"	1 7/16"	31/32"	1,500	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/16"	3/4"	1/2"	1 25/32"	1 1/16"	2,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1/2"	27/32"	21/32"	1 27/32"	1 7/32"	3,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/8"	1 1/32"	3/4"	2 7/16"	1 1/2"	4,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/4"	1 1/4"	29/32"	2 27/32"	1 3/4"	6,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/8"	1 1/2"	1"	3 5/16"	2"	8,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1"	1 23/32"	1 5/32"	3 13/16"	2 5/16"	10,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/4"	2 1/32"	1 3/8"	4 11/16"	3 5/16"	14,000	Forged	Screw	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000

Safety-Pin Shackles—For Lifting

A bolt fastened with a nut and cotter pin makes these shackles more secure than screw-pin shackles. Also known as anchor and bow shackles, the wide body provides room to attach multiple connectors.

Black-oxide steel shackles have a dark surface color.

Galvanized steel shackles have a thick coating for corrosion resistance.

316 stainless steel shackles have excellent resistance to salt water and chemicals.

Note: Capacities listed are for vertical lifting only. As the lift angle changes from vertical, the amount of weight the shackle can lift is significantly reduced.

Black-Oxide Steel
Thick.	Opening Wd.	Pin Dia.	Inside Lg.	Inside Wd.	Capacity, lbs.	Fabrication	Pin Type	Specifications Met		Each
1/4"	15/32"	5/16"	1 1/8"	3/4"	1,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
5/16"	17/32"	3/8"	1 1/4"	15/16"	1,500	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/8"	21/32"	7/16"	1 7/16"	1 1/8"	2,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/16"	23/32"	1/2"	1 11/16"	1 5/16"	3,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1/2"	13/16"	5/8"	1 15/16"	1 1/2"	4,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/8"	1 1/16"	3/4"	2 1/2"	1 7/8"	6,500	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/4"	1 1/4"	7/8"	3"	2"	9,500	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/8"	1 7/16"	1"	3 1/4"	2 5/8"	13,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1"	1 11/16"	1 1/8"	3 3/4"	2 3/4"	17,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
Galvanized Steel
3/16"	13/32"	1/4"	29/32"	5/8"	700	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1/4"	1/2"	5/16"	1 5/32"	25/32"	1,100	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/16"	17/32"	13/32"	1 1/4"	27/32"	1,600	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/8"	11/16"	15/32"	1 15/32"	1 1/32"	2,200	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/16"	3/4"	1/2"	1 23/32"	1 3/16"	3,300	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1/2"	13/16"	21/32"	1 29/32"	1 5/16"	4,400	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/8"	1 1/16"	25/32"	2 13/32"	1 23/32"	7,100	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/4"	1 1/4"	29/32"	2 13/16"	2"	10,400	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/8"	1 15/32"	1 1/32"	3 5/16"	2 9/32"	14,300	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1"	1 23/32"	1 5/32"	3 3/4"	2 23/32"	18,700	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/8"	1 13/16"	1 1/4"	4 1/4"	2 15/16"	20,900	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/4"	2 1/32"	1 13/32"	4 21/32"	2 29/32"	24,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 3/8"	2 1/4"	1 1/2"	5 7/32"	3 1/4"	27,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/2"	2 7/16"	1 21/32"	5 21/32"	3 1/2"	34,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 3/4"	2 31/32"	2"	7"	4 3/4"	50,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
2"	3 9/32"	2 1/4"	7 15/32"	5 1/2"	70,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
Galvanized Alloy Steel
1/2"	27/32"	21/32"	1 31/32"	1 13/32"	6,600	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/8"	1 1/16"	3/4"	2 7/16"	1 21/32"	10,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/4"	1 9/32"	29/32"	2 27/32"	1 29/32"	14,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/8"	1 15/32"	1"	3 5/16"	2 1/16"	19,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1"	1 3/4"	1 5/32"	3 3/4"	2 17/32"	25,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/4"	2 1/32"	1 13/32"	4 21/32"	2 29/32"	36,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/2"	2 7/16"	1 21/32"	5 21/32"	3 1/2"	60,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 5/8"	2 21/32"	1 3/4"	6 1/8"	4 1/8"	58,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 3/4"	2 31/32"	2"	7"	4 3/4"	80,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
2"	3 9/32"	2 1/4"	7 15/32"	5 1/2"	100,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000000
316 Stainless Steel
1/4"	1/2"	5/16"	1 1/8"	3/4"	1,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/16"	17/32"	3/8"	1 7/32"	13/16"	1,300	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/8"	11/16"	7/16"	1 7/16"	31/32"	1,500	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
7/16"	3/4"	1/2"	1 25/32"	1 1/16"	2,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
1/2"	27/32"	5/8"	1 27/32"	1 7/32"	3,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
5/8"	1 1/32"	3/4"	2 7/16"	1 1/2"	4,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	00000
3/4"	1 1/4"	7/8"	2 27/32"	1 3/4"	6,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
7/8"	1 1/2"	1"	3 5/16"	2"	8,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1"	1 23/32"	1 1/8"	3 13/16"	2 5/16"	10,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000
1 1/4"	2 1/32"	1 3/8"	4 11/16"	3 5/16"	14,000	Forged	Safety	ASME B30.26, Fed. Spec. RR-C-271F	0000000	000000

Screw-Pin Shackles—Not for Lifting

For use in low-vibration applications where the shackle remains stationary. Also known as anchor and bow shackles, the wide body provides room to attach multiple connectors. All are 316 stainless steel and have excellent resistance to salt water and chemicals.

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

316 Stainless Steel
Thick.	Opening Wd.	Pin Dia.	Inside Lg.	Inside Wd.	Capacity, lbs.	Pin Type		Each
5/32"	11/32"	5/32"	3/4"	9/16"	200	Screw	00000000	00000
3/16"	7/16"	7/32"	31/32"	23/32"	500	Screw	00000000	0000
1/4"	1/2"	1/4"	1 3/32"	27/32"	700	Screw	00000000	0000
5/16"	11/16"	5/16"	1 15/32"	1 1/8"	1,000	Screw	00000000	0000
3/8"	13/16"	13/32"	1 25/32"	1 3/8"	1,200	Screw	00000000	00000
15/32"	15/16"	15/32"	2 5/32"	1 21/32"	1,500	Screw	00000000	00000
1/2"	1 1/16"	17/32"	2 11/32"	1 7/8"	2,500	Screw	00000000	00000
5/8"	1 1/4"	5/8"	3"	2 3/16"	3,000	Screw	00000000	00000
3/4"	1 1/2"	3/4"	3 11/32"	2 11/16"	4,000	Screw	00000000	00000
7/8"	1 23/32"	7/8"	3 27/32"	2 31/32"	5,000	Screw	00000000	00000
1"	1 31/32"	31/32"	4 7/16"	3 3/8"	6,000	Screw	00000000	000000
1 1/4"	2 1/2"	1 1/4"	5 7/16"	4 15/32"	9,000	Screw	00000000	000000

Captive Locking Screw-Pin Shackles—Not for Lifting

A lip on the shackle keeps the screw from falling out when loosened. Also known as anchor and bow shackles, the wide body provides room to attach multiple connectors. All are 316 stainless steel and have excellent resistance to salt water and chemicals.

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

316 Stainless Steel
Thick.	Opening Wd.	Pin Dia.	Inside Lg.	Inside Wd.	Capacity, lbs.	Pin Type		Each
5/32"	11/32"	3/16"	23/32"	1/2"	400	Captive Locking Screw	0000000	000000
3/16"	13/32"	7/32"	29/32"	5/8"	600	Captive Locking Screw	0000000	00000
1/4"	1/2"	1/4"	1 3/32"	3/4"	900	Captive Locking Screw	0000000	00000
5/16"	21/32"	11/32"	1 15/32"	1 1/32"	1,600	Captive Locking Screw	0000000	00000
3/8"	25/32"	13/32"	1 3/4"	1 11/32"	1,200	Captive Locking Screw	00000000	00000
13/32"	13/16"	13/32"	1 13/16"	1 3/8"	2,200	Captive Locking Screw	0000000	00000
15/32"	15/16"	15/32"	2 5/32"	1 21/32"	1,500	Captive Locking Screw	00000000	00000