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Thread: Difference finished between semi-finished nuts

  1. #1
    Associate Engineer
    Join Date
    Mar 2015
    Posts
    1

    Difference finished between semi-finished nuts

    I would like to request some help differentiating finished from semi-finished bolt.

    I've been specifying for year nuts according to my description below. Changing materials of bolts and nut depending on service.

    ITEM - STUD-BOLT,THREADED FULL LENGTH, W/ TWO SEMI-FINISHED HEAVY HEXAGON NUTS EACH.
    MATERIAL
    STUD - CHROME-MOLY ALLOY ASTM-A320, GRADE L7
    NUTS - CARBON-MOLY ALLOY ASTM-A194, GRADE 4
    LENGTH - EFFECTIVE THREAD LENGTH EXCLUDING ENDPOINTS PER ASME B16.5

    One vendor recently asked what is the meaning of "Semi finished nuts" and I am not able to give him an answer.
    ASME B 1.20 and B 18.2.1 does not say anything about the semi finished and finished state of nuts.


    My question is "what is the difference finished between semi-finished nuts"

    Hope someone can help me with this.

  2. #2
    Senior Engineer
    Join Date
    Sep 2014
    Posts
    35

    Engeneering

    Thanks this nis a great stuff about the engeneering purposes.

  3. #3
    Administrator Kelly Bramble's Avatar
    Join Date
    Feb 2011
    Location
    Bold Springs, GA
    Posts
    2,295
    "SEMI-FINISHED" means that the hardware has been manufactured but not finished as in there will be no plating or heat treating done on the components.

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