Bolts

Discussion in 'PSI Superchargers Tech Questions' started by hotrodharlkey, Jan 25, 2010.

  1. hotrodharlkey

    hotrodharlkey New Member

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    Can i get socket head bolts from local hardware store to bolt blower pulleys onto snout and crank hub or should i use a special type bolts?
    Don
    badtoyzz racing
    775-340-5505
     
    #1
    hotrodharlkey, Jan 25, 2010
  2. Mike Canter

    Mike Canter Top Dragster
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    I use grade 8 plated bolts from Ace Hardware with a grade 8 washer and never had a problem. Socket head bolts that a black in color from Ace are grade 8.
     
    #2
    Mike Canter, Jan 25, 2010
  3. hotrodharlkey

    hotrodharlkey New Member

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    that is just what i was going to get. the black ones from ace hardware.it is only 3 blocks from me so makes it easy for me to get my bolts from there.great.thanks Mike..just what i needed to know.
     
    #3
    hotrodharlkey, Jan 25, 2010
  4. Alkydrag

    Alkydrag Sr. Dragster

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    Not to disrespect Mike, but I was told that socket head bolts aren't graded. So how do you know they are grade 8?
     
    #4
    Alkydrag, Jan 25, 2010
  5. Mike Canter

    Mike Canter Top Dragster
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    It is a standard that black coated socket head bolts are grade 8. Thats according to a very large fastner supply company.
     
    #5
    Mike Canter, Jan 26, 2010
  6. Mike Canter

    Mike Canter Top Dragster
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    I believe the standard is either ASTM F912 or ASME B18.3 that requires black oxide finish socket head screws to be Grade 8.
     
    #6
    Mike Canter, Jan 26, 2010
  7. Fuel Cars

    Fuel Cars AA/AM

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    Mike, unless the bolts are identified as meeting those specs, they can be anything. The identification will be either on the bolts or the packaging.

    Many foreign nations make bolts with different types of coating that do not meet any standard specification and are sold in various outlets.

    If you can verify the bolts at Ace were manufactured to those specs, that's great, but if you can't, I wouldn't use them.
     
    #7
    Fuel Cars, Jan 26, 2010
  8. Mike Canter

    Mike Canter Top Dragster
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    Paul, I understand what you are saying but then the same applies to Grade marked bolts that are made in those foreign countries. We assume from the markings that they meet our standards but who checks that. I do know that the aircraft company I worked for specified that all the bolts had to be made US companies and I know the other aircraft company does the same thing. (Remember that next time you fly in a non US made plane such as an Airbus).
     
    #8
    Mike Canter, Jan 26, 2010
  9. Ron C

    Ron C Jr. Dragster

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    For those that don't have a hardware store close by, Spruce Aircraft has a reasonable supply of bolts http://www.aircraftspruce.com/menus/ha/bolts.html
    They also have alumnium and 4130 material. I've purchased and used some of there aero tubing. Excellent prices and they ship to your door.

    Blessings.........Ron Clevenger.
     
    #9
    Ron C, Jan 26, 2010
  10. SoDak

    SoDak Active Member

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    We are all familiar with the markings that indicate grade 5 or 8, there is also usually an identification marking, examples would be a triangle or "H-K".
    Here at work we run on the premise that a reputible mfg (one that abides to bolt standards) will put there marking on the bolt.

    If there is no mfg marking than don't use it because there is no traceability. This is our philosophy.
     
    #10
    SoDak, Jan 26, 2010

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