JIS standards issued by the Japanese Industrial Standards Committee are widely used in Japanese OEM projects (automotive, electronics, machinery), known for precise metric dimensions and tight tolerances.

JIS to ISO & GB Equivalents

• JIS B 1180 ≈ ISO 4014/4017 ≈ GB/T 5782/5783 — Hex bolts
• JIS B 1181 ≈ ISO 4032 ≈ GB/T 6170 — Hex nuts
• JIS B 1256 ≈ ISO 7089 ≈ GB/T 97.1 — Plain washers
• JIS B 1189 ≈ ISO 4762 ≈ GB/T 70.1 — Socket head cap screws

Popular JIS Standard Numbers

Bolts & Screws

• JIS B 1180 — Hexagon head bolts
• JIS B 1189 — Hexagon socket head cap screws
• JIS B 1176 — Hexagon flange bolts
• JIS B 1190 — Hexagon flange nuts
• JIS B 1111 — Cross recessed head machine screws
• JIS B 1112 — Slotted head machine screws
• JIS B 1122 — Slotted head machine screws (small)
• JIS B 1214 — Self-tapping screws (cross recessed)

Nuts

• JIS B 1181 — Hexagon nuts
• JIS B 1182 — Hexagon thin nuts
• JIS B 1195 — Prevailing torque type hexagon nuts
• JIS B 1186 — Hexagon nuts with flange
• JIS B 1196 — Hexagon cap nuts (acorn)

Washers & Rings

• JIS B 1256 — Plain washers
• JIS B 1251 — Spring lock washers
• JIS B 1252 — Toothed lock washers
• JIS B 2804 — Retaining rings (C-type, E-type)
• JIS B 2808 — Spring pins (slotted)

Mechanical Properties

• JIS B 1051 — Mechanical properties of carbon steel bolts and screws
• JIS B 1052 — Mechanical properties of nuts
• JIS B 1053 — Mechanical properties of stainless steel fasteners
• JIS B 1001 — Metric screw threads (basis profile and dimensions)
• JIS B 0205 — Metric coarse screw threads