ISO standards issued by the International Organization for Standardization define dimensions, materials, mechanical properties and technical requirements for bolts, nuts, screws, washers and retaining rings. Adopted by 160+ countries, ISO is the first choice for global trade and OEM procurement.

ISO to GB Equivalents

• ISO 4014 ≈ GB/T 5782 — Hex head bolts
• ISO 4017 ≈ GB/T 5783 — Hex head screws (full thread)
• ISO 4032 ≈ GB/T 6170 — Hex nuts
• ISO 4762 ≈ GB/T 70.1 — Socket head cap screws
• ISO 7089 ≈ GB/T 97.1 — Plain washers

Popular ISO Standard Numbers

Bolts & Screws

• ISO 4014 — Hex head bolts, product grades A and B
• ISO 4017 — Hex head screws, full thread
• ISO 4016 — Hex head bolts, product grade C
• ISO 4762 — Socket head cap screws
• ISO 10642 — Socket countersunk head cap screws
• ISO 7380 — Socket button head cap screws
• ISO 4162 — Hex flange bolts
• ISO 8676 — Hex head screws, fine pitch thread

Nuts

• ISO 4032 — Hex nuts, style 1
• ISO 4033 — Hex nuts, style 2
• ISO 4034 — Hex nuts, product grade C
• ISO 7040 — Prevailing torque hex nuts, non-metallic insert
• ISO 7042 — Prevailing torque all-metal hex nuts

Washers

• ISO 7089 — Plain washers, normal series
• ISO 7090 — Plain washers, chamfered, normal series
• ISO 7091 — Plain washers, small series
• ISO 7092 — Plain washers, small series
• ISO 7093 — Plain washers, large series

Performance & Threads

• ISO 898-1 — Mechanical properties of carbon steel bolts and screws
• ISO 898-2 — Mechanical properties of nuts
• ISO 3506-1/2 — Mechanical properties of stainless steel fasteners
• ISO 965-1 — ISO general purpose metric screw threads
• ISO 6157-1 — Surface discontinuities on bolts, screws and studs