Senco 39B35MP DuraSpin Drywall to Light Steel Collated Screws 3.9mm x 35mm (1000 in Box) The Senco 39B35MP is a box of 1000 Drywall screws used for fastening interior Drywall to light gauge metal studs. They are 35mm in length with a nominal diameter of 3.9mm. Thread type is fine with a Phillip 2 bugle head. Features: Grey phosphate finish Plastic collated x50 screws Specification: Length: 35mm Point type: Sharp Screw recess size: 2 Screw recess type: Philips Point angle (nominal): 23º Article number: 39B35MP Screw diameter: 3.7-4mm Nominal diameter: 3.9mm Fastener length: 34-36mm Screw diameter max: 4mm Shank type fastener 1: Fine Screw diameter min: 3.7mm Fastener type: Collated Screws Length of threaded part: 30mm Wire material: Phosphate (grey) Collation type 1: Plastic Collated Inner threaded diameter: 2.8mm Head diameter (round) min: 8mm Fastener head type 1: Bugle Head Head diameter (round) max: 8.5mm Amount fasteners on strip/coil: 50-50 pieces