JB/T 3411.34-1999
六方冲子 尺寸
Hexagon piercer -- Dimensions
1999-05-20
JB/T 3411.33-1999
四方冲子 尺寸
Squarel piercer -- Dimensions
1999-05-20
GB/T 905-1994
冷拉圆钢、方钢、六角钢尺寸、外形、重量及允许偏差
Dimension，shape，weight and tolerance for cold-drawn round，square and hexagonal steels
1994-12-22
GB/T 342-2017
冷拉圆钢丝、方钢丝、六角钢丝尺寸、外形、重量及允许偏差
Dimension,shape,mass and tolerance of cold-drawn round,square and hexagonal steel wires
2017-11-01
ISO 6362-6-2025
Wrought aluminium and aluminium alloys — Extruded rods/bars, tubes and profiles — Part 6: Tolerances on form and dimensions for round, square, rectangular and hexagonal tubes
锻造铝和铝合金 挤压棒/棒、管和型材 第6部分:圆、方、矩形和六角形管的形状和尺寸公差
2025-03-28