M4-0.7 x 8 mm SEMS Screws / Double Washer / Phillips / Pan JIS-B1-188 Head / Steel / Zinc Yellow / Split Lockwasher & Flat Washer / 8mm Flat Washer OD (Quantity: 3,000 pcs)
Availablity: In stock
JIS-B1 188 Phillips Split/Flat Washer
SEMS / Machine Screws
Small Pan Head with free-spinning Flat Washer & Helical Split Lockwasher
Manufactured to JIS-B1 188 specifications
Fully Threaded
SEMS / Machine Screws
Small Pan Head with free-spinning Flat Washer & Helical Split Lockwasher
Manufactured to JIS-B1 188 specifications
Fully Threaded
SKU: 477403
$193.99
In stock
SKU
477403
A cross-recessed, pan head machine screw with two free spinning, captive washers. Directly below the pan head is a helical split lockwasher: beneath the split lockwasher is a round flat washer. The diameter and height of the pan head are between 5% and 20% smaller than a standard pan head. This double washer SEMS screw is typically a more economical alternative to a patented conical washer SEMS screw. They are commonly used in the electronics industry.
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