1970 Radiator Core Support Bolts

[Allen N.]

The 1970 radiator brackets at the top are attached by four black phosphate hex headed bolts. Two of them are GM 180080 and are 5/16-18 X 1-1/4". How are the GM 179832 and 9419032 bolts different from the 180080?

[Michael C.]

Re: 1970 Radiator Core Support Bolts

on my 72 ls5 i have 179823 which is 1 1/4" long but with a small shoulder. 180080 is 1 1/4" but is threaded all the way. 9419032 is a grade 8 bolt that is 1 1/2" long. ill post a picture

[David B.]

Re: 1970 Radiator Core Support Bolts

180080 5/16 -18 x 1 1/8 long zinc
179832 3/8 - 16 x 7/16 long plain
9419032 5/16 - 18 x 1 1/4 long phosphate coated GM 4435 code A
179823 5/16 - 18 x 1 5/8 long plain
All are similar appearing Hexagon bolts

[Michael C.]

Re: 1970 Radiator Core Support Bolts

Top bolt is the #178923 which is grade 8 and the bottom is the #9419032. I had them reversed in my prior reply. Finish may be incorrect

[David B.]

Re: 1970 Radiator Core Support Bolts

178923 is an Inverted Flared Tube Fitting for 7/16 tube, pipe thread size 1/4 Brass chrome-bright
I think you mean 179823 GM 280-M steel 2A thread

[Michael C.]