Can’t understand the thread specifications provided by the design institute; seeking help
Thread Content
According to the material list provided by the design institute, the materials are studs and nuts. Specification (model): 100; Code: BFB0276; Description: full thread stud bolt with 2 heavy nuts, material 35CrMoA/30CrMoA, standard SH3404. Quantity: 8 pieces. The specification for this stud seems to refer to a nominal length of 100, but what is the thread specification? We usually express thread sizes as something like M40x100. I’ve checked the SH3404 standard, but I still can’t figure out what kind of stud it refers to – in particular, I’m not clear about the thread specification
This post was last edited by yuchenchf on 2014-4-11 at 10:53; it’s all designed in this style
Help, please! Is there anyone who has experience in design? Please share your insights
It really doesn’t specify the dimensions of the studs here; it only indicates that they are fully threaded double-ended studs with nuts at both ends, as well as the length of the studs, the standard number, and the material requirements.
Yes, I was thinking that this bolt is used as a connection bolt for the flange; once the specifications of the flange are known, the length of the bolt thread should be determinable
It is obvious that the design institute did not specify the exact requirements for the studs. Those who know a little English only know that they are fully threaded studs accompanied by two nuts, in accordance with the SH3404 standard. Are we, as the clients, supposed to look up this standard on our own and determine the size of the bolts based on the flanges they provided? ?
For our construction work, we usually don’t check the specifications; instead, we determine the required bolt types and quantities on our own and then place orders for them. Check the material list in case there’s a mistake in the purchase, as that could cause trouble
If you know the flange standard specifications, there’s no need to calculate anything; you can simply use the given standards to find the appropriate connectors
If it is provided as part of the flange, the description might be a bit too simplified. LZ, take another close look at its design specifications to see if there’s anything mentioned regarding supply issues
In the end, I still had to look up the required thread specifications for the flanges myself in order to specify the materials needed. It wasn’t a difficult task, but it did add an extra step of hassle!
Answer after five years: Materials: Stud bolts and nuts. Specification (model): 100. Code: BFB0276. Description: Full-thread stud bolt with 2 heavy nuts, material 35CrMoA/30CrMoA, SH3404. Quantity: 8. The person asking the question should request from the design office a detailed description for code BFB0276. Maybe the universal material code will help you. UMCS.CN