396 pulse amp to core support fasteners

[Mike M.]

previous owner removed the pulse amp. need picture or description of the fasteners, which AIM shows as GM part # 9419245. i believe they are hex head self tapping blunt ended cutting critters. also could use source. thanks,mike

[Bill W.]

Re: 396 pulse amp to core supporrt fastners

Hi Mike . The originals from St. Louis built 17346 are anchor recessed head self threading bolts with a blunt tip 1" total length . I cant tell the finish looks like it could have been cad ??? Tony will know .

[Mike M.]

Re: 396 pulse amp to core supporrt fastners

thanks bill. i agree . i believe, but am not sure, but do they have an integral washer ? and are the ends of the self threaded shaft cut to facilitate their insertion into the core support? also, although the AIM shows a "lock" washer for the ground wire, i have been told a star washer was used. regards, mike

[Bill W.]

Re: 396 pulse amp to core supporrt fastners

The washer was built in the head like a small body bolt . I dont remember if mine had a washer on the ground wire , if it did it would be on my wire loom I will need to check it . The bolts are tapered but do not have a cut out like a drill .

[Mike M.]

Re: 396 pulse amp to core supporrt fastners

thanks again bill. "washer built in the head" is what i refer to as an integral washer and i agree they should be integral. KC has a couple 396's and he believes that a star washer was used for the ground, although the AIM calls for a lock washer and the illustration in the AIM also appears to be a lock washer. i tend to think that KC is correct and the AIM isn't---because most all c-1 and c-2 grounded wires i've dealt with utilize external toothed star washers. now all i have to do is try and find the 3 fasteners. mike

[Bill W.]

Re: 396 pulse amp to core supporrt fastners

Mike I cleaned them up a little and took a few pictures . I'll chec the wire loom later .DSC_1623.jpgDSC_1633.jpgDSC_1629.jpgDSC_1627.jpg

[Mike M.]

Re: 396 pulse amp to core supporrt fastners

Bill: thanks much for going to the trouble.i suspect finding the anchor head mark with multiple circles surrounding the anchor is gonna be challenging. i have none with mfgr logo like these in my bolt collection. might hit the local junk yards, weather permitting. thanks again,mike

[Wayne M.]

Re: 396 pulse amp to core supporrt fastners

Mike -- As you say, the '65 AIM (K66 Sheet 2, passenger side amplifier mount) shows screw # 9419245 with (what looks like a flat) washer # 121753. But if you have a '64 AIM handy, drawing definitely shows a star washer with the same part #, item 3, revised 3-26-64.

Looking in P&A30 (Rev July 1, 1965) section 8.932 (tooth lockwashers, cadmium), #121753 shows as external type, 1/4" (inner hole dia.), and a pack of 100 would have cost you 80 cents.

Can't help on the screws, as # 23564's original amp is long gone, but the tapped holes still look pretty good.

[Bill W.]

Re: 396 pulse amp to core supporrt fastners

I checked my loom & found the ground but no fastener or washer It looked like it could have had a star washer judging the marks on the ground wire ??? If you figure out what finish the three mounting bolts had let me know .

[Loren L.]

Re: 396 pulse amp to core supporrt fastners

Hi Mike . The originals from St. Louis built 17346 are anchor recessed head self threading bolts with a blunt tip 1" total length . I cant tell the finish looks like it could have been cad ??? Tony will know .

FWIW (not a boat motor car) #23561 had the anchors symbol screws described - measure 1.19" from top of the head to the blunted end. Also had a star washer (8 pointed) that measures exactly 1/2" diameter. The 368 regulator gave up 3 cutter (yellow cad) screws with the as described "integral washer" head with a "C" logo - 1.48" long (top of head to bottom) that were blown through the fiberglass, NOT through the pre-drilled regulator holes. (#23561 is L79, 4 spd, A/C, PS, TI cvt.)