Fastners

Screw Threads - Efunda overview of threads and bolted fastners

Nuts, Bolts, Fasteners and Plumbing Handbook by Carol Smith - Good practical book with background in car racing.

Minitaps - Miniature: Taps, Gages & Fasteners. Specialize in small and miniature turned parts for a wide range of industries

Micro Fasteners - Small Fasteners.

Albany County Fasteners - AlbanyCountyFasteners.com is committed to carrying the largest selection fasteners in 18-8, 304, 316, 410 Stainless Steel, Silicon Bronze and Solid Brass