AI Search

UNI 6421 - 1969

Hexagon Screws for Manufacture of Railway and Tramway Rolling Stock - ISO Metric Coarse Thread - Finish A

UNI 6421 - 1969 全螺纹六角头螺栓

See all versions and complete specifications: Hexagon Screws for Manufacture of Railway and Tramway Rolling Stock - ISO Metric Coarse Thread - Finish A — Full Specification Page

Dimensional Specifications — UNI 6421 - 1969 (mm)

Size	P	k_max	s_max	s_min	k_nominal
M4	0.8	3.5	8	7.85	8.87
M5	1.25	5.5	13	12.73	14.38
M6	1.75	8	19	18.67	21.1
M8	2	9	22	21.67	24.49

Related Standards

GB /T 5781 - 2025— Hexagon Head Bolts - Full Thread - Product Grade C GB /T 5781 - 2016— Hexagon Head Bolts - Full Thread - Product Grade C GB /T 5783 - 2016— Hexagon Head Bolts - Full Thread GB /T 5786 - 2016— Hexagon Head Bolts with Fine Pitch Thread - Full Thread GB /T 5781 - 2000— Hexagon Head Bolts - Full Thread - Product GradeC GB /T 5783 - 2000— Hexagon Head Bolts - Full Thread - Grade A and B GB /T 5786 - 2000— Hexagon Head Bolts with Fine Pitch Thread - Full Thread GB /T 5781 - 1986— Hexagon Head Bolts - Full Thread - Product Grade C

Technical Specifications & Availability

Request detailed technical specifications, material certifications, and availability information for your application requirements. Our engineering team can provide product recommendations, custom specifications, and technical documentation.

Request Technical Specifications WhatsApp Inquiry

Product Documentation|Application Consultation|Quick Chat

Technical Support Available

Material Certifications

Custom Specifications