1. Materai: Aluminum, Iron, Brass, or other customized requests SUS201,SUS304,SUS316,A2-70,A2-80,A4-80,4.8 6.8 8.8 10.9 12.92. Size: M4-M163. Standard:?DIN GB ISO JIS BA ANSI4. Certification: ISO9001, SGS, CTI, ROHS5.Model: BLFAS-022?Q: What is the current market for powder metallurgy products?A: Now the dosage of powder metallurgy products is increasing year by year. With the improvement of powder metallurgy technology, powder metallurgy is still very advantageous.?The head of the screw is deformed and the head is snoring. The possible cause is a poor installation of the screw mold and improper adjustment. http://www.blfspchina.com/screw...-clasp-sealing-bolt.html