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  1. Join Date
    Aug 2003
    Posts
    9,552
    #1
    i'm the kinda guy na kada bukas ng engine hood e merong nawawalang screw/nut/bolts. san makakahanap ng spare? my instinct say hardware store, pero parang magkaiba ata ung pambahay sa pang oto na screws/nuts/bolts

  2. Join Date
    Jul 2003
    Posts
    55
    #2
    dude, IMO hi-tensile use for car.

  3. Join Date
    Aug 2003
    Posts
    9,552
    #3
    sorry, i'm not sure i follow...hi-tensile nuts/bolts/screws?

  4. Join Date
    Oct 2002
    Posts
    145
    #4
    Punta ka ng recto, sa T. Mapua, maraming bilihan ng kahit anong screws doon. for industrial use dun ako bumibili ng gamit nung may machine shop pa ko.

  5. Join Date
    Oct 2002
    Posts
    145
    #5
    Sorry nakalimutan ko Tonsuy ang store name nung isa tatlo yun iisa mayari....

  6. Join Date
    Jul 2003
    Posts
    49
    #6
    To Suy sa may T. Mapua. You must know the size and thread pitch.

  7. Join Date
    Dec 2002
    Posts
    636
    #7
    San juan area, try Y2K along pinaglabanan near N domingo st.

  8. Join Date
    Mar 2003
    Posts
    571
    #8
    parang meron sa concorde.

  9. Join Date
    Oct 2002
    Posts
    10,411
    #9
    yung mga bolts na nasa labas ng engine parehas lang yan ng mabibili mo sa ordinary hardware. ordinary bolts, nuts and screws lang mga yan. usually walang markings yan sa head, basically grade 1 bolts.

    ang mga bolts sa loob ng engine, like cylinder head bolts, rocker arm bolts, connecting rod bearing cap bolts, main bearing cap bolts, etc etc ay special bolts. high grade high temperature bolts mga yan, usually grade 8 high temp. ma-distinguish mo yan sa marking dun sa bolt head - ang grade 8 high temp bolt ay may 6 na lines na parang asterisk (*) and dun sa center ng asterisk may triangle.

    grade 3 = 1 line sa head ng bolts, very very uncommon.
    grade 4 = 2 lines (parang V pero di magkaduktong yung line), also not commonly used.
    grade 5 = 3 lines na parang Y pero di rin magkaduktong yung lines. this is the most common bolt used in automotive chasis and mountings, and also the most common industrial bolt/screw.
    grade 6 = 4 lines na parang X, di magkaduktong yung mga lines
    grade 7 = 5 lines na parang asterisk pero 5-pointed lang
    grade 8 = 6 lines parang asterisk (*)

    a triangle in the center of the bolt head means high temp (triangle means "fire" or "heat" in chemistry, remember?)

    pag japanese or european ang car mo then it will most probably be a metric thread bolt, that is the bolt size is expressed in millimeters. the thread pitch is expressed in threads/10 mm, or sometimes in millemeters/thread.

    pag american car then it will be in asme thread size, or inches. size is expressed in diameter X threads/inch, like 1/2x13 UNC, meaning 1/2 inch diameter x 13 threads/inch coarse pitch thread. or 1/2X18 UNF, meaning 1/2 inch diameter x 18 threads/inch fine pitch thread.

    usually pag high tension applications ay fine pitch thread ang gamit dahil mas maliit kasi ang lead angle ng thread so mas mataas ang torque rating (a higher lead angle tends to make the bolt loose under tension).
    Last edited by yebo; June 12th, 2004 at 02:17 PM.

  10. Join Date
    Dec 2002
    Posts
    636
    #10
    yebo
    Great info.
    Do stainless bolts come in these different grades?
    What's the usual type of metal used for the special bolts?

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screws, nuts & bolts