[Hallicrafters] Re: PK Screws

[Marshall M. Dues]

Pique (or PeeKay) was the manufacturer's name for a type of truss head 
sheet metal screw that was very popular for fastening earlier aircraft 
sheet metal panels such as wing root fairings to airframes as well as a 
substitute for rib stitching for attaching fabric to wing ribs (ala the 
1946 Aeronca 7AC "Champ").  The screw was known as a "PK" screw, and 
this became a popular descriptor for that type of screw, regardless of 
who actually manufactured it. These screws look like wood screws in that 
they have a sharp pointed thread of now particular pitch, and a truss 
head (a low profile oval with a Phillips head), but are used for thin 
sheet metal fastening without the use of washers or nuts.

Marshall Dues  WB5MYO
Katy, TX


Oliver J. Dragon wrote:

> Hello,
> Sorry for my ignorance. I don't know what pique refers to. Is it a 
> particular type of sheet metal screw?
> Ollie.
> 
> 
> 
> At 01:57 PM 04/07/2004, you wrote:
> 
>> P.K. = Pique
>>
>> Marshall Dues WB5MYO
>> Katy, TX
>>
>> Oliver J. Dragon wrote:
>>
>>> Hello All,
>>>
>>> Also, for the front panel mounting screws, the parts list calls them 
>>> # 6 P.K.  I know they are sheet metal screws but what does the "P.K." 
>>> mean?
> 
> 
> 
>