ASTM A194 3

We manufacture to both standard and supplementary ASTM A194 3 standards, as required by your application.

Made from AISI grade 501 (UNS S50100) material, finished nuts are manufactured by cold or hot forging or machining from raw material and then heat treated accordingly. Used predominantly with ASTM A193 B5 material within the petrochemical industry.

Manufactured to ASTM A194 3 standard specification, LoneStar Fasteners Europe can also offer supplementary requirements of the standard as required by the application.

ASTM A194 3: Forms

  LoneStar Manufacture 
Imperial Nuts – Heavy and Normal Series – Including ANSI B18.2.2
Metric Nuts – Regular and High types – Including DIN 934 H=D, ISO
Available with locking features

ASTM A194 3: Sizes and Threads

  LoneStar Manufacture 
Metric Coarse
Metric Fine
Imperial UNC
Imperial 8UN
Imperial UNF
Metric sizes available Up to M100 Up to M100
Imperial sizes available Up to 4.00″ Up to 4.00″

ASTM A194 3: Chemical Composition

Carbon 0.10 % Min
Manganese 1.00 % Max
Phosphorus 0.04 % Max
Sulphur 0.03 % Max
Silicon 1.00 % Max
Chromium 4.0-6.0 %
Molybdenum 0.40 – 0.65 %

Mechanical Properties


Proof Load Hardness Hardness
Up to 4” Inc. ASTM A194 Table
3 + 4
248-327 HB 24-35 HRC

Similar or Equivalent Standards

AISI 501
DIN 12 Cr Mo 19.5
B.S. 1506-625


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