cotter pin


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cotter pin

Machinery
1. a split pin secured, after passing through holes in the parts to be attached, by spreading the ends
2. a tapered pin threaded at the smaller end and secured by a nut after insertion
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Cotter Pin

 

a wire strip semicircular in cross section and bent approximately in half. Cotter pins are used to fasten lightly stressed, coupled parts or to prevent nuts from loosening. After a cotter pin is inserted through a hole, its ends are separated. Half of the pin is longer than the other for convenient separation. Cotter pins are made of carbon steel.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

cotter pin

[′käd·ər ‚pin]
(design engineering)
A split pin, inserted into a hole, to hold a nut or cotter securely to a bolt or shaft, or to hold a pair of hinge plates together.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

cotter pin

cotter pin: above, below, installation
A metal pin used for fastening; the split ends which project beyond the pin hole are bent back from the axis of the pin.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

cotter pin

cotter pinclick for a larger image
A type of split pin used to safely secure a castle nut or a clevis pin. It is formed by doubling a piece of wire, semicircular in cross section, to form a loop at one end. After insertion in a hole or a slot in a nut and through mating crosswise holes in a bolt, the ends of the pins are bent to hold them in place. This fastener is widely used in locations where service inspection is difficult and failure would be disastrous. They are also used to prevent relative motion or sliding. Also called a cotter key.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Soon enough, other companies began selling positive locking cotter pins. Pivot Point scurried back to the drawing board (and its supply of paper clips).
Recommend that the cotter pin be installed pointing toward the left side of the prop control arm to avoid contact with feathering detent spring.
Refer to WP4-14.4 of TM 9-2355-318-23-3 on how to remove the C-clip, Item 9, and the latch pin, Item 10, and how to replace them with retrofit latch and cotter pins. See TACOM GPA 09020 for more info: https://tulsa.tacom.army.mil/safety/gpm/tacom_wn/gpm09-020.html
Prevent that damage by making sure the retaining nut and cotter pin are installed on the outside of the shackle, facing away from the ramp.
With Valve 1, the trouble is usually the cotter pin that connects the valve to the gear.
Here's what you get in the kits: Part NSN Bracket assembly 2590-01-473-2719 Ring spacer 5365-01-473-0415 Ring spacer 5365-01-473-0409 Connecting link 3040-01-472-7745 (M939/A1 kit only) Connecting link 3040-01-472-7747 (M939A2 kit only) Straight pin 5315-00-904-1634 Cotter pin 5315-00-011-9120 Cotter pin 5315-00-012-0123 Plain hex nut (2) 5310-00-891-1733 Straight pin 5315-00-140-1938 Rod end clevis 5340-00-664-7597 Machine bolt (2) 5306-01-123-0891
(G) Bolt, NSN 5306-01-037-4886 Washer, NSN 5310-00-209-0698 Nut, NSN 5310-00-834-8755 Cotter pin, NSN 5315-00-843-0138
Discard the old hook and install the new one with its pin and cotter pin.
Secure the pin in place with the new cotter pin. Here are the parts you'll need: Size NSN Spring 5360-01-384-5338 Washer 5310-01-384-4231 Pin 5315-01-385-7871 Cotter pin 5315-01-378-7858