Jis B 1007 Pdf Jun 2026

JIS B 1007 is a Japanese Industrial Standard that specifies the requirements for (also known as split lock washers or coil spring lock washers). These are helical-shaped washers designed to prevent nuts and bolts from loosening due to vibration or torque relaxation.

| Symbol Category | Representative Symbols (illustrative) | Typical Use Cases | |-----------------|----------------------------------------|-------------------| | | • Hex bolt (head‑view) • Countersunk screw • Lock washer | Mechanical assembly drawings, BOM lists | | Welding | • Fillet weld (symbol) • Groove weld (different preparations) | Structural steel fabrication, shipbuilding | | Surface finish | • Roughness symbol (Ra, Rz) • Machining allowance | Manufacturing process specifications | | Material hatching | • Stacked 45° lines (steel) • Diagonal 30° lines (aluminium) | Section views showing material composition | | Fluid‑flow | • Arrowed pipe line (direction) • Valve symbols (gate, globe) | Piping & instrumentation diagrams (P&ID) | | Electrical | • Ground symbol • Motor, transformer icons | Wiring diagrams, control panel schematics | | Safety/Warning | • Exclamation mark within triangle • Fire‑hazard symbol | Safety signage on engineering documentation | jis b 1007 pdf

The Jis B 1007 pdf standard covers a wide range of fasteners, including: JIS B 1007 is a Japanese Industrial Standard