Rear bag bolt sizes? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**kev2809** · 10-02-2009, 10:49 PM

hey guys, i looked around and the only thing that came up was this thread, which is a great how to btw..

http://67-72chevytrucks.com/vboard/s...d.php?t=129463

im bagging the rear of my 67 suburban and i need to know what size bolt the bottom bolt is that goes where the spring bolt was. im going to lowes tomorrow and i dont wanna be a douche and sit there guessing with the million bolts they have lol. also, how long and what size for the top 2 bolts that bolt the bag to the frame. i basically just want to be in and out and not diddle around looking for different ones. can anyone help me out, thanks!

VA72C10 · 10-03-2009, 12:51 AM

3/8" X4" make sure it's grade 8. And the washer you see in that thread is from a harmonic balancer....i got a small thin washer to capture the bolt and a thicker one to give it some stability to create the same effect.

VA72C10 · 10-03-2009, 12:53 AM

The top should be 3/8 as well....believe they are the same size...Take the bag with you and you can verify it...(or test at home w/ a 3/8" bolt...probably only need to be 2" or so on top I'd imagine but haven't gotten to that point on mine...maybe someone else will chime in...

DZL1 · 10-03-2009, 01:23 AM

2 Inch for top grade 8 will work. Are you mounting bag directly to frame or plate then frame?

DZL1.

ShowSS12 · 10-03-2009, 06:29 AM

the threads that go into the bags are 3/8-16

**kev2809** · 10-03-2009, 09:59 AM

mounting them directly to the frame, well, that little plate that the spring used to bolt to thats riveted on the frame. lowes wouldnt carry a harmonic balancer washer though right? could just a big washer work, or a few big washers from lowes?

ShowSS12 · 10-03-2009, 10:46 AM

Just get the thickest wash they have that will fit the bolt..

**kev2809** · 10-03-2009, 02:37 PM

i just got back and got all the grade 8 bolts. they didnt have grade 8 lock nuts so i got steel ones along with fender washers for the bottom bag bolt and grade 8 washers for the top bag bolts. could i reuse the spring bolt washers instead of the ones i got from lowes? they look pretty good after 42 years, the ones from lowes look pretty good too but was just wondering.

**kev2809** · 10-08-2009, 09:56 PM

one more thing, what did you guys use to drill the fitting hole in the frame? i bought a 3/4" drill bit, too small. i bought a step drill bit that goes up to like 1 an 3/8 or something like that but the bit is getting stuck and spinning free without cutting metal. seemed like it smoothed that step on the drill bit now, this is getting ridiculous.

i sliced my arm and nearly broke my pinky finger now, lol. any ideas of something easier?

VA72C10 · 10-10-2009, 07:35 AM

Quote:

Originally Posted by kev2809

one more thing, what did you guys use to drill the fitting hole in the frame? i bought a 3/4" drill bit, too small. i bought a step drill bit that goes up to like 1 an 3/8 or something like that but the bit is getting stuck and spinning free without cutting metal. seemed like it smoothed that step on the drill bit now, this is getting ridiculous.

i sliced my arm and nearly broke my pinky finger now, lol. any ideas of something easier?

I haven't done it yet, but I bought a nice metal hole saw 1 1/2" to make that cut.

**kev2809** · 10-11-2009, 09:39 PM

Quote:

Originally Posted by VA72C10

I haven't done it yet, but I bought a nice metal hole saw 1 1/2" to make that cut.

let me know of this works. I got a step drill bit and it just smoothed out the step on the bit lol. ima try it again with a stronger drill and see what happens

DHPmike · 10-10-2009, 09:52 AM

grade 8 is overdoing it. Everyone likes to hear "grade 8" but you would probably never break a grade 2.

nothing wrong with using grade 8 though. but its certainly not a necessity, nothings going to break without it. If it did then you have problems in the deisgn or install that makes the bag pull against the bolt.

10-02-2009, 10:49 PM	#1
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,175	Rear bag bolt sizes? hey guys, i looked around and the only thing that came up was this thread, which is a great how to btw.. http://67-72chevytrucks.com/vboard/s...d.php?t=129463 im bagging the rear of my 67 suburban and i need to know what size bolt the bottom bolt is that goes where the spring bolt was. im going to lowes tomorrow and i dont wanna be a douche and sit there guessing with the million bolts they have lol. also, how long and what size for the top 2 bolts that bolt the bag to the frame. i basically just want to be in and out and not diddle around looking for different ones. can anyone help me out, thanks! __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]

10-03-2009, 12:51 AM	#2
VA72C10 VA72C10 Join Date: Mar 2008 Location: Midlothian, VA Posts: 25,267	Re: Rear bag bolt sizes? 3/8" X4" make sure it's grade 8. And the washer you see in that thread is from a harmonic balancer....i got a small thin washer to capture the bolt and a thicker one to give it some stability to create the same effect. __________________ Looking for a 67-72 swb or blazer project in or around VA.

10-03-2009, 12:53 AM	#3
VA72C10 VA72C10 Join Date: Mar 2008 Location: Midlothian, VA Posts: 25,267	Re: Rear bag bolt sizes? The top should be 3/8 as well....believe they are the same size...Take the bag with you and you can verify it...(or test at home w/ a 3/8" bolt...probably only need to be 2" or so on top I'd imagine but haven't gotten to that point on mine...maybe someone else will chime in... __________________ Looking for a 67-72 swb or blazer project in or around VA.

10-03-2009, 01:23 AM	#4
DZL1 One day..... Join Date: Aug 2008 Location: Ocala, FL. Posts: 702	Re: Rear bag bolt sizes? 2 Inch for top grade 8 will work. Are you mounting bag directly to frame or plate then frame? DZL1.

10-03-2009, 06:29 AM	#5
ShowSS12 Registered User Join Date: Apr 2008 Location: Sugarland,Tejas Posts: 356	Re: Rear bag bolt sizes? the threads that go into the bags are 3/8-16 __________________ Adam M STX Designs Motorcycles \| Choppers \| Hotrods Last edited by ShowSS12; 10-03-2009 at 06:30 AM.

10-03-2009, 09:59 AM	#6
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,175	Re: Rear bag bolt sizes? mounting them directly to the frame, well, that little plate that the spring used to bolt to thats riveted on the frame. lowes wouldnt carry a harmonic balancer washer though right? could just a big washer work, or a few big washers from lowes? __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]

10-03-2009, 10:46 AM	#7
ShowSS12 Registered User Join Date: Apr 2008 Location: Sugarland,Tejas Posts: 356	Re: Rear bag bolt sizes? Just get the thickest wash they have that will fit the bolt.. __________________ Adam M STX Designs Motorcycles \| Choppers \| Hotrods

10-03-2009, 02:37 PM	#8
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,175	Re: Rear bag bolt sizes? i just got back and got all the grade 8 bolts. they didnt have grade 8 lock nuts so i got steel ones along with fender washers for the bottom bag bolt and grade 8 washers for the top bag bolts. could i reuse the spring bolt washers instead of the ones i got from lowes? they look pretty good after 42 years, the ones from lowes look pretty good too but was just wondering. __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]

10-08-2009, 09:56 PM	#9
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,175	Re: Rear bag bolt sizes? one more thing, what did you guys use to drill the fitting hole in the frame? i bought a 3/4" drill bit, too small. i bought a step drill bit that goes up to like 1 an 3/8 or something like that but the bit is getting stuck and spinning free without cutting metal. seemed like it smoothed that step on the drill bit now, this is getting ridiculous. i sliced my arm and nearly broke my pinky finger now, lol. any ideas of something easier? __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_] Last edited by kev2809; 10-08-2009 at 09:57 PM.

10-10-2009, 09:52 AM	#12
DHPmike Registered User Join Date: Jul 2009 Location: Wylie Texas Posts: 91	Re: Rear bag bolt sizes? grade 8 is overdoing it. Everyone likes to hear "grade 8" but you would probably never break a grade 2. nothing wrong with using grade 8 though. but its certainly not a necessity, nothings going to break without it. If it did then you have problems in the deisgn or install that makes the bag pull against the bolt.

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