Standard No.:	GB/T 9459-1988
English Name:	Hexagon thin slotted nuts-Fine pitch thread-Product grades A and B
Chinese Name:	六角开槽薄螺母 细牙 A和B级
Chinese Classification:	J13    Fastener
Professional Classification:	GB    National Standard
ICS Classification:	21.060.20 21.060.20    Nuts 21.060.20
Source Content Issued by:	China Machinery Industry Federation
Issued on:	1988-06-24
Implemented on:	1989-7-1
Status:	valid
Superseding:	GB 59-1976
Target Language:	English
File Format:	PDF
Word Count:	1000 words
Translation Price(USD):	70.0
Delivery:	via email in 1 business day

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. 1 Subject content This standard specifies Grades A and B hexagon thin slotted nuts with fine pitch threads and thread specifications of M8 to M36. Grade A is for nuts with D ≤ 16, and Grade B is for nuts with D > 16. 2 Normative references GB 196 General purpose metric screw threads - Basic dimensions GB 197 General purpose screw threads - Tolerances and fits GB 91 Split pins GB 3098.4 Mechanical properties of fasteners - Fine pitch thread GB 3103.1 Tolerances for fasteners bolts, screws and nuts GB 5267 Electroplated coatings on threaded fasteners GB 5279.2 Surface discontinuities of fasteners on nuts for general requirements GB 1237 Designation system for fasteners GB 90 Acceptance inspection, marking and packaging of fasteners 3 Dimensions See the following figure and Table 1 for dimensions. The bottom of the slot is allowed to be made into a flat bottom; It is allowed to make flared threaded holes within the length (m–W); The junction of the hexagon and the slotted end face of the nut is allowed to be rounded and blunt.   Table 1 mm Note: Whenever possible, specifications in parentheses shall not be used. 4 Technical conditions See Table 2 for the technical conditions.

1 Subject content 2 Normative references 3 Dimensions 4 Technical conditions 5 Designation