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should fit snugly in their holes to prevent shifting of the workpieces and maintain the alignment of fastener holes which do not have Clecos in them. They are blind fasteners; so they can be installed in assemblies where the worker does not have access to the other side. If permanent fasteners are installed in Cleco holes, a Cleco will be removed when its hole is needed. If the workpieces are bonded or welded, then the Cleco holes may need to be filled later.
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are used to push in the spring-loaded plunger. This pushes down on the step-cut locks, which pushes them away from the spreader bars and allows them to come together. This allows the user to slip the locking jaws through a hole made through multiple sheets of material. When the plunger is released
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Clecos are installed in holes drilled through the workpieces (usually holes intended for permanent fasteners installed later). They expand on the far side of the workpieces and then draw and clamp them together while maintaining the desired alignment and preventing distortion of the pieces. Clecos
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the spring pulls the locking jaws back towards the spreader bar, which separates the two jaws. The material sheets are then squeezed in between the step-cut area and the steel cylinder. This keeps the holes in the separate sheets aligned.
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mechanism to draw the spreader bar up. Clecos of this type take more time to install and remove, but can pull parts together more tightly than the spring-type Clecos. They are commonly available with a
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sheets of material together, or to hold parts such as stiffeners, frames etc together, before they are permanently joined.
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so that they may be spaced more closely together. In either case they will usually have a
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Jeppesen
Sanderson, Inc. (2002) "A&P Technician Airframe Textbook", Jeppesen Sanderson
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Building
Victory: Aircraft Manufacturing in the Los Angeles Area in World War II,
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body that may be better gripped to tighten or release the spreader bar.
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109:, a pair of step-cut locks, and a spreader bar. A special type of
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Bryan, Hal (July 2013). "Man, I really like clecos".
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43:. Widely used in the manufacture and repair of
143:Cleco-type fasteners are also available with a
189:Regardless of their form, they are typically
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23:Cleco (Cleko) fasteners on an aircraft wing
16:Holds parts together before final assembly
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193:for ready identification of their size.
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105:cylinder body, a plunger on the top, a
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152:for hand tightening, or with a simple
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67:Clecos in use during an aircraft build
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306:. Experimental Aircraft Association.
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182:Four clecos showing color coding
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41:Cleveland Pneumatic Tool Company
343:Performance Bodies & Parts
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377:Pan American Tool Corporation
101:The basic type consists of a
51:, it is used to temporarily
31:, also spelled generically
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320:p. 70, Cypress, CA, 2013.
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136:Different types of clecos
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398:"Cleco Pins / Fasteners"
164:Sizes and color-coding
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339:"PRP Cleco Tool Only"
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373:"Cleco Fasteners"
326:978-0-9897906-0-4
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118:Design variations
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76:Fastener and tool
39:developed by the
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304:EAA Experimenter
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407:20 September
405:. Retrieved
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382:20 September
380:. Retrieved
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348:20 September
346:. Retrieved
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204:inches (mm)
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191:color-coded
289:References
94:Cleco tool
429:Fasteners
158:hexagonal
59:Operation
47:-skinned
423:Category
402:Skinpins
209:Silver (
145:threaded
49:aircraft
45:aluminum
37:fastener
277:⁄
256:⁄
239:⁄
220:⁄
154:hex nut
150:wingnut
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282:(4.8)
266:Gold (
261:(4.0)
249:Black
244:(3.2)
231:Copper
225:(2.4)
199:Color
111:pliers
107:spring
53:fasten
268:brass
103:steel
33:cleko
29:cleco
409:2024
384:2024
350:2024
322:ISBN
211:zinc
202:Size
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27:A
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
