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    mbo Osswald produces folding spring bolts, ES-bolts, suitable for clevis, clevises, according to DIN 71752, DIN ISO 8140, CETOP RP102P. We manufacture these of steel, 1.0718 resp. the spring of spring steel.

    Folding spring bolt FKB 12x48 Steel phosphatised oiled

    3 reviews since 25.10.2026
    Price per piece
    Optional
    Delivery time

    Fast-track this part (max. 400 units) through our production facility. Shorten the delivery time by 1-2 working days. We are currently exclusively testing this delivery service for Germany.
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    Total price
    Business customer

    plus VAT
    plus shipping costs

    Mounting and removal is possible without tools!
    Order no.
    10 01 0012 8002/002
    SKU
    0009082
    MPN
    MBO-FKB-12X48-ST-PHOS
    Identifier
    Folding spring bolt (suitable for clevises)
    Size
    FKB 12x48
    Material group
    Steel
    Surface
    phosphatised oiled
    Suitable for clevis
    G 12x48
    d1 h11
    12
    g
    48
    a
    28
    b
    31,2
    l1
    78
    l1 Tolerance
    ≈
    l2
    69
    l2 Tolerance
    ≈
    l3 ˜
    12
    Mass (kg) per 100 pieces
    3,5
    Material

    Bolt: undercut steel 1.0715 (11SMn30+C) / 1.0718 (11SMnPb30+C), tensile strength approx. 460-810 N/mm², alternative: thermal treatment steel C45 or C45Pb induction-hardened (of manufacturer's choice), hardening depth: approx. 0,5 mm, alternative: 1.0715 / 1.0718 hardend by soft nitriding, hardening depth: approx. 0,03 mm

    Spring: spring band steel C60 up to Ck75 hardened and annealed to approx. 430-500 HV

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