Metric Fasteners - Socket Screw Hex Key and Nut Wrench Size

We highly recommend measuring metric screws by the screw thread diameter, but there are situations that come up where you might need to measure a screw size based upon limited information. Here we address two useful ways to find the screw size, or at least get you close enough that you can make an informed decision abo

Wiha 66990 MagicRing® Ball End Hex L-Key 9 Pc. Set

Hex Socket Bolts, M8×25mm Allen Head Screw, A2-70

Allen Key Bolts & Socket Screws

Hex Key, Hexagon Key, Socket Key, Allen Key, Short Arm (Metric

Hex Cap Screws Hex Bolt, Hex Cap Screw Metric Class

Button Socket Head 10.9 M6X1.0 Coarse ISO 7380-1 - BelMetric

939531-1 Socket Head Cap Screw: M24-3.00 Tr Size, 100 mm Lg, 19 mm

Wrench Spanners - Inches vs. mm

REF: Hex, Socket (Allen) and Torx Bolt and Screw Wrench Sizes

What Is An Allen Wrench?

Bolt Depot - Metric socket flat head, Stainless steel 18-8 (A-2