Difference finished between semi-finished nuts

[whtechc]

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.

Read more:

http://www.egpet.net/vb/threads/82166-Difference-finished-between-semi-finished-nuts#ixzz3U2zzrH7K

 

[mcgyvr]

ah yes nothing like specifying requirements and not knowing what they are..

A semi-finished fastener is a fastener made to the same basic dimensions as a finished fastener but having greater tolerances on most dimensions and only the bearing surface and threads finished

http://www.eng-tips.com/viewthread.cfm?qid=187211

or just google.. plenty of information so now you can stop just throwing requirements out there without knowing what they mean..

 

[whtechc]

Thanks for the reply mcgyvr,
Most of our projects, the client already have their own piping material specifications. We just adopt them to the project.
Yes but you are right, we should be accountable for all engineering specifications that we will release with our initials on them.