ConcoursMustang Forums

1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1966 Mustang => Topic started by: Morsel on October 08, 2019, 01:09:56 PM

Title: 66 San Jose Roof Rail screws question
Post by: Morsel on October 08, 2019, 01:09:56 PM

Asking for a friend, he sent me a couple pictures asking me but have no idea and don't want to lead him in the wrong direction. But I've attached two pictures of roof rail screws (I think). He disassembled the car and is asking if the screw on the right is the correct original factory one, it has the sort of self tapping end to it. The one on the left is an AMK. Because he found these in his parts bin and they are in good shape, if they are the correct ones he wants to use them instead of the AMKs...

Thanks for any help as always,

Jason

Title: Re: 66 San Jose Roof Rail screws question
Post by: J_Speegle on October 10, 2019, 06:18:45 PM

Believe they were self tapping like all the later years also. Same as the one used at the bottom front end of the roof weatherstrip if the car was built during that time period.

Will double check and pull one when I remember

Title: Re: 66 San Jose Roof Rail screws question
Post by: jwc66k on October 11, 2019, 03:40:04 PM

Per the assembly manuals, 66 and 67 used 380858-S2 10-16x1/2 wafer head screws that were not drill tips (64-65 used 377948-S2 8-18x1/2 wafer, also specified as used on 64-68 convertibles). I could not find a drill tip screw in size 10, however a round washer head, 381801-S2 8-18x1/2 drill tip was used in 68-69 on hardtops and fastbacks/sportroofs.
Jim

Title: Re: 66 San Jose Roof Rail screws question
Post by: J_Speegle on October 11, 2019, 07:08:59 PM

Did go out and check two 66's I have here at home this moment - neither I believe have been apart. Both had the self tapping (drill point) style of flat head P&O finished screws holding the roof rail trim to the car. One coupe one fastback, one maybe a late Jan the other a late March built San Jose examples.  Like shown in the OP's first posted picture on the right hand side

This is the same I as I recall seeing on other examples over the years - just confirming

Title: Re: 66 San Jose Roof Rail screws question
Post by: jwc66k on October 11, 2019, 07:44:20 PM

Those are known as "self-tapping" screws, not "drill tip" screws. The "AMK Guide To Ford Fasteners, 1955-73" (pg163) shows 380858-S with a tapered point tip. The "Ford Standard and Utility Parts Catalog, January 1969" (Osborn AM0205) pg 76, shows a "self-tapping" square point tip. Do not get this confused with a true "drill tip" as also shown in the "AMK Guide To Ford Fasteners, 1955-73" on pg163.
Jim

Title: Re: 66 San Jose Roof Rail screws question
Post by: J_Speegle on October 11, 2019, 09:37:42 PM

Quote from: jwc66k on October 11, 2019, 07:44:20 PM

......Do not get this confused with a true "drill tip" .....

Would not want that to happen :)

Tip was like the one in the first picture as mentioned

Title: Re: 66 San Jose Roof Rail screws question
Post by: Morsel on October 14, 2019, 06:10:53 PM

Thanks guys, super helpful as always...

Jason