Indented Chamfered Hex Washer Head Bolt | Screw Manufacturing for 50 Years | Sen Chang
Sen Chang Industrial Co., Ltd., since 1968, is a Indented Chamfered Hex Washer Head Bolt | CE certified screw manufacturer based in Taiwan.
ISO 9001 certified self tapping screw production processes and stainless steel screws and bolts with meticulous quality control. Screws and bolts including Machine Screws, Tapping Screws, SEMS Screws, Coating Screws and High Tensile Screws.
Sen Chang has been supplying nuts and bolts to customers, both with advanced technology and 48 years of experience, Sen Chang ensures each customer's demands are met.
Process: Using multi blow header for head formation before using head-molding model to make the head be hex-shaped and threading flat washer A2, and then acid washing
All the items are inspected during the process and before shipping, complying with ISO Working Instruction
Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector
Measurement Points: Across the flat and corner, Head height, Washer diameter, Washer height, Total length, Thread length, Major diameter, Minor diameter, Thread angle, Pitch