Our company to purchase a number of fasteners to see when the CAD drawings in the technical requirements I do not know the specific to write those content
Fasteners are generally standard parts, have national standards (except for special requirements)
Name: Bolt nut flat cushion pad - (should be written in the national label) Drawing No .: Ask the engineer Material: Q235 Q235 steel spring steel ---- ordinary 35 steel 35 steel spring steel ---- high strength ratio: according to the actual Drawing quality: check the information or do not fill the level: 4.8 5 200HV 65MN ------ ordinary 8.8 8 300HV 65MN ------ high strength specifications: write their own
1, the product used by the material (the available material is too much to see what your company to ask) 2, the accuracy of the thread (bolt type of external thread is generally 6g, nut class internal thread is generally 6h) 3, surface treatment Stainless steel materials generally do not do treatment, carbon steel, color, galvanized, Dacromet, nickel, chrome, etc.) 4, product tolerances before the surface treatment or surface treatment of the above is the standard parts of the standard, But also depends on the actual use, we must deal with the landlord.
You mark the standard number and grade on the line, but the general standard is not required to issue a drawing. Quality inspection in accordance with the standard check can be.
