Please consult customer service for detailed specifications. Customize various types of screws, nails. All kinds of metal products. (Samples can be sent.) Size can be customized. Your enquiry is welcome. Thanks dear. 201 / 304 / 316L Inch thread size: #1/4-20 #1/4-28 #10-24 #10-32 #4-40 #6-32 #6-40 #8-32 1/4-20 1/4-20 x 1/4 1/4-28