I recently discovered that the clip which holds the turn signal flasher to the LH radio side panel is missing. While researching the part, I found what seems to be conflicting information. According to the 1965-1967 AIMs this clip was GM 3866440, used with Screw 9419328, which AMK shows as a #10-16 x 1/2" screw. (UPC 12-B1)
Beginning in 1968 two of these clips are used per car. One in the jack stowage compartment (GM 3866440 Clip, UPC UA6-A3, Item 3), same p/n as 1965-67, but uses Screw # 9420688, which AMK shows as being a #6-20 x 1/2" screw. That can't be, if it's going in the same hole that takes a #10-16 x 1/2" screw in the same clip for 1965-67. The other location in 1968 is under the dash (UPC 12-B4, item 11), the Clip looks identical but has a different p/n, GM 3943610. It is used with Screw # 9421137. AMK shows this screw is #8-18 x 1/2".
The 1969 AIM shows Clip 3943610 being used in both locations, with Screw 9421137 used under the dash and Screw 9420688 used in the jack stowage compartment.
The new clip 3943610 first appears in the October 1968 printing of the 1969 P&A, listed this way:
68-69 CORVETTE (2nd design) . . . . . . CLIP, dir. sig. lamp flasher . . . . . . . 3943610†
†NOTE: 3943610 (2nd design) has larger mtg. hole than 3866440 (1st design).
Pictures of original 3866440 clips look identical to pictures of NOS 3943610 clips, as far as I can tell. It seems that the only way to distinguish the 3866440 clip from the 3943610 clip is by the size of screw it takes. The P&A says the 2nd design (3943610) clip has a larger mounting hole implying a larger screw, but the 1968-1969 AIMs call out screw part numbers which have a smaller diameter, either 9420688 (#6-20 x 1/2", which seems impossible) or 9421137 (#8-18 x 1/2"), if either AMK or I have the respective dimensions correct.
Do the later clips (1968+) actually have a larger hole, or does the P&A have it backwards, and it should say the later clips have a smaller mounting hole? Is there any other way to distinguish the two clips?
Can anyone confirm the screw sizes used in any of these locations, for either 65-67 or 68+?
Beginning in 1968 two of these clips are used per car. One in the jack stowage compartment (GM 3866440 Clip, UPC UA6-A3, Item 3), same p/n as 1965-67, but uses Screw # 9420688, which AMK shows as being a #6-20 x 1/2" screw. That can't be, if it's going in the same hole that takes a #10-16 x 1/2" screw in the same clip for 1965-67. The other location in 1968 is under the dash (UPC 12-B4, item 11), the Clip looks identical but has a different p/n, GM 3943610. It is used with Screw # 9421137. AMK shows this screw is #8-18 x 1/2".
The 1969 AIM shows Clip 3943610 being used in both locations, with Screw 9421137 used under the dash and Screw 9420688 used in the jack stowage compartment.
The new clip 3943610 first appears in the October 1968 printing of the 1969 P&A, listed this way:
68-69 CORVETTE (2nd design) . . . . . . CLIP, dir. sig. lamp flasher . . . . . . . 3943610†
†NOTE: 3943610 (2nd design) has larger mtg. hole than 3866440 (1st design).
Pictures of original 3866440 clips look identical to pictures of NOS 3943610 clips, as far as I can tell. It seems that the only way to distinguish the 3866440 clip from the 3943610 clip is by the size of screw it takes. The P&A says the 2nd design (3943610) clip has a larger mounting hole implying a larger screw, but the 1968-1969 AIMs call out screw part numbers which have a smaller diameter, either 9420688 (#6-20 x 1/2", which seems impossible) or 9421137 (#8-18 x 1/2"), if either AMK or I have the respective dimensions correct.
Do the later clips (1968+) actually have a larger hole, or does the P&A have it backwards, and it should say the later clips have a smaller mounting hole? Is there any other way to distinguish the two clips?
Can anyone confirm the screw sizes used in any of these locations, for either 65-67 or 68+?
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