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Database: 365,228(8 Aug 2026)
fasteners hexagon head bolts hexagon head screws shank product grade b introductionthis standard shank part split pin hole development land land particle analysis instruments test layout
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  2. GB/T 31.2-2025 in English
GB/T 31.2-2025 in English

GB/T 31.2-2025 in English

VALID

Fasteners—Hexagon head bolts with split pin hole on shank—Part 2: Reduced shank—Product grade B

  • Issued on:2025-10-31
  • Implemented on:2026-02-01
  • File Format:PDF
  • Delivery:Via email within 1~3 business days
Price(USD)： $195.00
$190.00
Standard No: GB/T 31.2-2025
Document status: VALID
Title in English: Fasteners—Hexagon head bolts with split pin hole on shank—Part 2: Reduced shank—Product grade B
Title in Chinese: 紧固件 六角头螺杆带孔螺栓 第2部分：细杆 B级
Language: English
File Format: Electronic (PDF)
Delivery: Via email within 1~3 business days
Issued on: 2025-10-31
Implemented on: 2026-02-01
Superseding: GB/T 31.2-1988 Hexagon bolts with split pin hole on shank-Reduced shank-Product grade B
ICS Classification: 21.060.10-Bolts, screws, studs
Chinese Classification: J13-Fastener
Professional Classification: GB-National Standard
Related Keywords: fasteners hexagon head bolts
hexagon head screws
shank product grade b introductionthis standard
shank part
split pin hole

《GB/T 31.2-2025紧固件 六角头螺杆带孔螺栓 第2部分：细杆 B级》由TC85（全国紧固件标准化技术委员会）归口，主管部门为中国机械工业联合会。


Introduction

This standard specifies the technical requirements for a specific type of fastener, namely hexagon head screws with holes in the bolt. It outlines the dimensions, tolerances, and material specifications necessary for the production and quality control of this product. The document is structured into sections that detail the general requirements, dimensional tolerances, and testing methods. It also includes information on marking and packaging. The standard is applicable to manufacturers, suppliers, and users who require a uniform specification for this type of fastener. The content is based on international practices and is tailored to meet the needs of the domestic industry. The standard is divided into parts, with this part focusing on the fine rod B class.

*** Please note: This description may not be accurate, please refer to the official documentation.

More samples: JJG 21-2008 JGJ 94-2008 YD/T 3934-2021
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