Topic: Interior Quarter Trim Screws

[Rainier42]

Would anyone know what the finish is supposed to be for the interior Quarter Trim Screws ( i.e., for Quarter Trim Panel and Trim Corner).  This is for a 1970 Dearborn B2.

[J_Speegle]

Believe chrome zinc plated small heads

[Mike Bauman]

It seems that there is some controversy as to the type of screw and the finish for the lower screw on the front fiberglass trim panel in the rear seat area on a 1970 sports roof........I was under the impression that the lower screw was a countersunk Phillips with a bright finish (chrome or zinc).  Others have suggested that this screw was a pan head Phillips with a zinc dichromate (gold) finish.
Anyone with a definitive answer....please chime in! .....thanks, Mike

[jwc66k]

I looked up the rear interior of a 70 Sports roof in the 70 Mustang Interior Assembly Manual (AM 0032 page 38) and if your description of the area of concern is good, the screw is 55934-S9, 8-18X3/4 oval head 17/64 dia , Phillips, with a bright zinc finish. There are 7 on each side holding the panels, looks to be a commonly used screw.
I recommend that you get a set of Mustang Assembly Manuals to assist you with your car.
Jim

[J_Speegle]

It seems that there is some controversy as to the type of screw and the finish for the lower screw on the front fiberglass trim panel in the rear seat area on a 1970 sports roof........I was under the impression that the lower screw was a countersunk Phillips with a bright finish (chrome or zinc).

That is what I've seen on the upper trim pieces and the front quarter panel covers as shown in the pictures below









Don't know of any other place screws were used - lower edge uses bolts like earlier years




Hope this helps

[Mike Bauman]

Jeff, thanks for posting pics. In the 3rd photo the lower screw is the one in question.  My feeling is, "typically" on a 70  the screw is a countersunk Phillips with a bright zinc finish as pictured.  Does a 69 sportsroof have a different screw in that location? 

[Brian Conway]

The ones on my car are phillips,oval and appear to be chrome.  Brian

[specialed]

Mike on the (69 rear panel anyway) that lower screw hole (in jeffs 3rd pic) that lower hole isn't tapered like the hole above it so that screw isn't tapered & flat on bottom head & a little bigger dome shaped as that panel is thin in that area . I researched this years ago in both 69-70 assembly manuals but never could document this as may have been a running change or plant issue since both 69 & 70 rear panels have c9zb eng #s the upper windlace area was notched out more on 70 to eliminate that 69 little triangle trim plastic.  Hard to doc this on a b9 since KK workers added the posi cable on rh side so those rear panel screws may not have all got back in place like at Dearborn plant but lh side should be unmolested area.  The assembly manual says in 70 model lite or dark interior screws so has anybody doc a late 70 black int. car with the dark screws change?

[Anghelrestorations]

Mike....in my opinion zinc dichromate screws on the 70 panels is not typical or mentioned in any documentation that I have.  So I would not put it on my car unless you have some proof it was originally that way from day 1.  This is for any of the trim screws in the back interior including the two you were asking about. 
I think Ed mentioned he has seen on some 69 cars that lower screw being zinc dichromate and I have seen pictures of this as well on some original cars.  But have never seen it on a 70. 

[J_Speegle]

.............. Does a 69 sportsroof have a different screw in that location?

Would not consider even looking since if it does match it still does not confirm what was used in 70 and if different it doesn't effect the outcome either since its a different year and plant

Think you'll find that allot of people share and discuss details but lump allot of years and plants into the mix - IMHO just making the waters muddier

[Rainier42]

Great info, thanks all!

[hopey]

assembly manual says in 70 model lite or dark interior screws so has anybody doc a late 70 black int. car with the dark screws change?

Bumping this one, has anyone documented dark (S2) finish on dark interior cars vs the (S9) finish as called out in the Osborne assembly manual drawing?

Specifically asking with reg Dearborn built mid-November 69 with black deluxe interior and also Dearborn January 1970 standard Dark Ivy.

Copy of the assembly drawing with the note on S2 versus S9 finish:-

[jwc66k]

- has anyone documented dark (S2) finish on dark interior cars vs the (S9) finish as called out in the Osborne assembly manual drawing?
Copy of the assembly drawing with the note on S2 versus S9 finish:-

The two different finishes "seem" to be a logical choice by Ford for trim screw "55934-Sx" ("1970 Mustang Interior Assembly Manual", AM0032 pg38, items "A" and "D") based on interior color. Whether this was done or not is the question. Assembly lines have been know to "substitute" hardware to "keep the line moving". To further "add confusion", AMK supplies both finishes. There is no help from Ford Car Parts (aka MPC) Soft Trim Section or interior trim illustrations for both 1969 and 1970. (Note: There is no 1969 Mustang Interior Assembly Manual). The accompanying pictures of previous posts do not cover all color combinations.
Jim

[hopey]

The two different finishes "seem" to be a logical choice by Ford for trim screw "55934-Sx" ("1970 Mustang Interior Assembly Manual", AM0032 pg38, items "A" and "D") based on interior color. Whether this was done or not is the question. Assembly lines have been know to "substitute" hardware to "keep the line moving". To further "add confusion", AMK supplies both finishes. There is no help from Ford Car Parts (aka MPC) Soft Trim Section or interior trim illustrations for both 1969 and 1970. (Note: There is no 1969 Mustang Interior Assembly Manual). The accompanying pictures of previous posts do not cover all color combinations.
Jim

Jim, exactly! I have looked through all my own photos and the Forums unrestored section, and for those showing the quarter panels screws they all appear to be S9 finish. I personally have not seen any S2 on an unrestored example. So the question remains, did Ford ever use the S2 fasteners on the darker finish interiors in 1970?

[jwc66k]

To further "complicate" this topic, the -S9 clear zinc verses the -S2 phosphate requirements finish note appears only on the fold down seat diagram (ref "1970 Mustang Interior Assembly Manual" AM0032) page 38 and does not appear on the fixed seat diagram, page 37. (Decisions, decisions.)
Jim