Cotter Pins

Cotter pins -- also known as split pins -- are thin metal pieces used to lock castle nuts in place on machine parts fitted to a shaft. They may be simple in design, but cotter pins are the key to preventing rotary parts from becoming loose and falling off during use. Let us help you identify the appropriate design for your needs, so you can always have a ready selection of pins on hand.

Cotter Pin Assortments

Sort By

1 2 3 4 5

1 - 50 of 571 results

Best Seller

APPROVED SUPPLIER

1/8 X 2 Cotter Pin Plated

#70726 | Pkg Qty:125

APPROVED SUPPLIER

1/8 X 1-1/2 Cotter Pin Plated

#70724 | Pkg Qty:125

APPROVED SUPPLIER

.178Wd X 3 3/4" Lg Hairpin Cotter Fits Hole 3/16'

#73563 | Pkg Qty:5

APPROVED SUPPLIER

5/32 X 1-1/2 Cotter Pin Plated

#70732 | Pkg Qty:125

APPROVED SUPPLIER

3/32 X 1 Cotter Pin Plated

#70709 | Pkg Qty:125

APPROVED SUPPLIER

.12Wd X 2 3/8" Hairpin Cotter Fits Hole 1/8"

#73561 | Pkg Qty:5

APPROVED SUPPLIER

Carbon Steel Extended Prong Cotter Pin, 1" L, 1/8" Pin Dia.

#70722 | Pkg Qty:125

APPROVED SUPPLIER

5/32 X 2 Cotter Pin Plated

#70734 | Pkg Qty:125

APPROVED SUPPLIER

.148Wd X 2 15/16" Hairpin Cotter Fit Hole 5/32"

#73505 | Pkg Qty:25

APPROVED SUPPLIER

3/16 X 1-1/2 Cotter Pin Plated

#70739 | Pkg Qty:125

APPROVED SUPPLIER

3/32 X 1-1/2 Cotter Pin Plated

#70711 | Pkg Qty:125

APPROVED SUPPLIER

3/16 X 2 Cotter Pin Plated

#70740 | Pkg Qty:125

APPROVED SUPPLIER

1/4 X 3 Cotter Pin Plated

#70748 | Pkg Qty:50

APPROVED SUPPLIER

Carbon Steel Extended Prong Cotter Pin, 1" L, 1/16" Pin Dia.

#70702 | Pkg Qty:125

APPROVED SUPPLIER

Low Carbon Steel Extended Prong Cotter Pin, 2-1/2" L, 5/32" Pin Dia.

#70735 | Pkg Qty:125

APPROVED SUPPLIER

.177Wd X 3 3/4" Hairpin Cotter Fits Hole 3/16"

#73506 | Pkg Qty:25

APPROVED SUPPLIER

3/32 X 3/4 Cotter Pin Plated

#70708 | Pkg Qty:125

APPROVED SUPPLIER

3/32 X 2 Cotter Pin Plated

#70713 | Pkg Qty:125

APPROVED SUPPLIER

7/64 X 1 Cotter Pin Plated

#70716 | Pkg Qty:125

APPROVED SUPPLIER

.148Wd X 2 11/16" Lg Hairpin Cotter Fits Hole 5/32"

#73562 | Pkg Qty:5

APPROVED SUPPLIER

Low Carbon Steel Extended Prong Cotter Pin, 3" L, 3/16" Pin Dia.

#70742 | Pkg Qty:125

APPROVED SUPPLIER

1/16 X 1-1/2 Cotter Pin Plated

#70704 | Pkg Qty:125

APPROVED SUPPLIER

.092Wd X 1 7/8" Hairpin Cotter Fits Hole 7/64"

#73560 | Pkg Qty:5

APPROVED SUPPLIER

Hairpin Cotter Pin 1/8" Wd X 2-9/16" Lng Fits Hole 9/64"

#73509 | Pkg Qty:25

APPROVED SUPPLIER

3/32 X 1-1/4 Cotter Pin Plated

#70710 | Pkg Qty:125

APPROVED SUPPLIER

3/8 X 3 Cotter Pin Plated

#70762 | Pkg Qty:50

APPROVED SUPPLIER

5/32 X 1 Cotter Pin Plated

#70730 | Pkg Qty:125

APPROVED SUPPLIER

1/16 X 3/4 Cotter Pin Plated

#70701 | Pkg Qty:125

APPROVED SUPPLIER

1/8 X 1-1/4 Cotter Pin Plated

#70723 | Pkg Qty:125

APPROVED SUPPLIER

1/16 X 1/2 Cotter Pin Plated

#70700 | Pkg Qty:125

APPROVED SUPPLIER

1/4 X 2 Cotter Pin Plated

#70746 | Pkg Qty:50

APPROVED SUPPLIER

1/8 X 2-1/2 Cotter Pin Plated

#70727 | Pkg Qty:125

APPROVED SUPPLIER

.08Wd X 1 3/16" Long Hairpin Cotter Fits Hole 3/32"

#73503 | Pkg Qty:50

APPROVED SUPPLIER

5/32 X 1-1/4 Cotter Pin Plated

#70731 | Pkg Qty:125

APPROVED SUPPLIER

3/32Wd X 1-5/8 Long Hairpin Cotter Fits Hole 7/64"

#73504 | Pkg Qty:50

APPROVED SUPPLIER

.062Wd 1/16X1 5/16L Hairpin Cotter Fits Hole 5/64"

#73502 | Pkg Qty:50

APPROVED SUPPLIER

.243Wd X 5" Lng Hairpin Cotter Fits Hole 1/4"

#73507 | Pkg Qty:10

APPROVED SUPPLIER

Low Carbon Steel Extended Prong Cotter Pin, 1-3/4" L, 1/8" Pin Dia.

#70725 | Pkg Qty:125

APPROVED SUPPLIER

3/16 X 2-1/2 Cotter Pin Plated

#70741 | Pkg Qty:125

APPROVED SUPPLIER

1/2 X 4 Cotter Pin Plated

#70771 | Pkg Qty:25

APPROVED SUPPLIER

3/32Wd X 2-1/2 Long Hairpin Cotter Fits Hole 7/64"

#73508 | Pkg Qty:50

APPROVED SUPPLIER

1/16 X 1-1/4 Cotter Pin Plated

#70703 | Pkg Qty:125

APPROVED SUPPLIER

1/4 X 1-1/2 Cotter Pin Plated

#70745 | Pkg Qty:50

APPROVED SUPPLIER

1/8 X 3/4 Cotter Pin Plated

#70721 | Pkg Qty:125

APPROVED SUPPLIER

1/4 X 2-1/2 Cotter Pin Plated

#70747 | Pkg Qty:50

APPROVED SUPPLIER

1/8 X 3 Cotter Pin Plated

#70728 | Pkg Qty:125

APPROVED SUPPLIER

Carbon Steel Extended Prong Cotter Pin, 1-1/2" L, 7/64" Pin Dia.

#70718 | Pkg Qty:125

APPROVED SUPPLIER

.042Wd X 1" Long Hair Pin Cotter Fits Hole 3/64"

#73501 | Pkg Qty:50

APPROVED SUPPLIER

7/64 X 3/4 Cotter Pin Plated

#70715 | Pkg Qty:125

APPROVED SUPPLIER

5/16 X 3 Cotter Pin Plated

#70754 | Pkg Qty:50

1 2 3 4 5

1 - 50 of 571 results

Related Categories

Pins Clevis Pins Hitch Pins Safety Pins Roll Pins

What are the Benefits of Using Cotter Pins?

Using cotter pins can help to keep your machines safe and secure. They are designed to withstand wear and tear due to vibrations and can help to prevent rotary parts from becoming loose and falling off during use.

How Do Cotter Pins Work?

Cotter pins are inserted into holes in a castle nut or bolt with a hole, which then holds it in place on the shaft it is attached to. The cotter pin is then twisted to secure it in the hole and the ends of the pins are bent over to prevent it from coming loose. This ensures the fastener is securely locked in place.

What are Cotter Pins?

Cotter pins -also known as split pins - are thin metal pieces designed to lock castle nuts and fasteners in place on machine parts. They are simple yet extremely effective in preventing rotary parts from becoming loose and falling off during use.