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UNC / UNF 4# 6# 8# 10#Grade 10.9 SteelHex Socket Allen Socket Button Head Screws Bolts Machine Screws DIN 7380High-quality materials, environmentally friendly, safe and reliable,durable and long life. Excellent craftsmanship,Smooth without burrs, quick and simple use.High strength！ high hardness* Note: Not all screw sizes are fully threaded. Longer screws can be half-threaded. If you mind this please ask us before purchasing.● System of Measurement: Inch● Standard:DIN EN ISO 7380 ( ISO 7380 ) (GB /T 70.2) ● Drive Style: Hex-key
● Material:Carbon Steel● Grade 10.9● Finish:Black Oxide● Head Style: Hex Socket Allen SocketButton Head●UNC Thread ,UNF Thread ● Thread Size:4# - 40 UNC
6# - 32 UNC
8# - 32 UNC
10# - 32 UNF ● Length: ( Does not include head length.)
