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 | ✓ | |
| ACME | ✓ | |
| 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 | % |
| Nickel | – | … |
| Molybdenum | 0.15-0.25 | % |
| Copper | – | … |
| Niobium | – | … |
| Titanium | – | … |
| Vanadium | – | … |
| Aluminium | – | … |
| Nitrogen | – | … |
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 |
| AFNOR 42 CD 4 |
| DIN 42 Cr Mo 4 |
| B.S. 1506-621 GrA |
Not Sure What You Are Looking For?
Quotation / Information Request