PRODUCT SHAPES AND SIZES PRODUCT SHAPES AND SIZES nHead Styles: Among the many different Head Styles Briarwood Fasteners, Inc. Fabricates are: 12-Point and Spline Heads, Flange & Shear Dee and Slab Heads Hexagon Heads, Flange Hex, Round, and Angle in Middle Flat Head, Torque, Phillips, 6 lobe Pan Head Socket Head nThread Sizes ranging from 4-40 through 1-1/2 Dia. nIn Lengths up to 12 Inches.