Heavy Hexagon Nuts

Heavy Hexagon Nuts – ASTM A 563M

Metric Series – Dimensions & Physical Properties

Notes:

  1. The nuts will generally conform to ANSI 818.2.4.1M – Metric Heavy Hexagonal Nuts
  2. Thread will conform to class 6H of ANSI B1.13M for Coarse Series
  3. Material & Heat Treatment: To achieve mechanical properties of Properties Class 8S or 10S of ASTM A563M
  4. Nuts of Property Class 8S are used with bolts of ASTM A325M – Type 1 (uncoated). Nuts of Property class 10S are used with bolts of ASTM A325M – Type 1 (Zinc-coated) (in general nuts of a higher property class can replace nuts of lower class in a join).
  5. In Bolt/Nut assembly, tightening should be done by rotation of nut.
  6. Sizes in brackets are non preferred standards.
  7. All dimensions are in millimeters.

Dimensions

Normal Thread Size Pitch W Max C Max H Nom
M12 1.75 21.00 24.25 12.10
(M14) 2.00 24.00 27.71 13.95
M16 2.00 27.00 31.18 16.75
M20 2.50 34.00 39.26 20.05
(M22) 2.50 36.00 41.57 22.95
M24 3.00 41.00 47.34 23.55
(M27) 3.00 46.00 53.12 26.95
M30 3.50 50.00 57.74 29.90

Physical Properties

Property Class For use with Bolts of type and finish Proof Load Stress N/MM2 Rockwell Hardness HR
8S ASTM A 325M
Type 1 (non-coated)		 1,075 889-C38
10S ASTM A 325M
Type 1 (zinc coated)		 1,245 (Normal Tapping)
1,165 (Oversize Tapping)		 C26 – C38