SAE J429 GRADE 5 HEX HEAD CAP SCREWS
|SAE J429||Covers the mechanical and material requirements for inch series fasteners used in automotive and related industries in diameters through 1-1/2″.|
|ASME B18.2.1||Covers the complete general and dimensional data for multiple types of inch series square and hex bolts and screws.|
|ASME B1.1 UNC & UNF Class 2A||Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.|
Common / economical medium strength fastener. Has greater tensile strength than Grade 2 / A307. Yield-to-tensile ratio is the lowest of all heat treated steel fasteners. Most common grade used in manufacturing.
Product to be marked with the manufacturers head marking as indicated by the X.
|Medium Carbon Steel, Heat Treated, Quenched and Tempered|
|1/4″ through 1″||85,000 psi||92,000 psi||120,000 psi||C25 to C34|
|1-1/8″ through 1-1/2″||74,000 psi||81,000 psi||105,000 psi||C19 to C30|
|Elongation||14% Minimum (All Diameters)|
|Reduction of Area||35% Minimum (All Diameters)|
|Material strengths listed are minimum acceptable per governing standard. Core hardness based on Rockwell scale. For diameters larger than 1-1/2 in., see ASTM A449 Type 1.|
ASTM A449 Type 1
Usable thread length for Grade 5 Hex Head Cap Screws can be approximated by the equation THREAD LENGTH = (2 X DIAMETER) + 1/4″
Sources: ASTM Standards for Mechanical Fasteners and Related Processes 2nd Edition, Inch Fastener Standards 8th Edition, Kanebridge Fastener Reference Guide 4th Edition
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