ASTM A194 7M

Ideal for high tensile environments within the oil, gas, and petrochemical industries.

ASTM A194 Grade 7M Nuts are carbon steel high tensile nuts used predominantly in the oil, gas and petrochemical industries, used in conjunction with ASTM A320 L7M Studs or headed fasteners.

100% hardness checked, achieving a Brinell hardness of 159 to 235, these nuts are tempered or stress relieved after machining, making them suitable for use in an environment which ASTM A194 Grade 7 Nuts are not.

LoneStar Fasteners Europe hold various options of ASTM A194 7M nuts offering a standard product, or with the supplementary requirements of ASTM A194 or bespoke manufactured to the additional requirements of API 20E BSL 1, 2 or 3.

ASTM A194 7M: 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 7M: Sizes and Threads 

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

ASTM A194 7M: Chemical Composition

Carbon 0.38-0.48
Manganese 0.75-1.00
Phosphorus 0.035 % Max
Sulphur 0.04 % Max
Silicon 0.15-0.35
Chromium 0.80-1.10 %
Molybdenum 0.15-0.25 %

ASTM A194 7M: Mechanical Properties

Proof Load Hardness Hardness
Up to 4” Inc. ASTM A194 Table
3 + 4
159-235HB 84 – 99 HRB

Similar or Equivalent Standards 

AISI 4142
DIN 42 Cr Mo 4
B.S. 1506-621 GrA


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