Shanghai Powermax Fastener Co., Ltd.
Shanghai Powermax Fastener Co., Ltd. Quality first, Clients first.
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ASTM A194 Grade 8T Stainless AISI 321 fine thread UNF heavy hex nuts
Heavy Hex Nuts are washer faced, are slightly larger Heavy Hex Nutsand thicker than standard hex nuts. The heavy hex pattern is typically used for large diameter and high strength bolts.Galvanized nuts are always tapped over-size to accommodate for the extra thickness added by the galvanizing process.
SIZE: 1/4" - 4", M6 -M100 .
STANDARD: ASME B18.2.2
THREAD: ASME B1.1 , UNC, UNF, UN8
FINISHED: Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G
A194 Grade 2:Carbon steel heavy hex nuts.
A194 Grade 2H:Quenched and tempered carbon steel heavy hex nuts.
A194 Grade 7:Quenched and tempered alloy steel heavy hex nuts.
A194 Grade 7L:Quenched and tempered alloy steel heavy hex nuts, Charpy impact tested.
A194 Grade 8:Stainless AISI 304 heavy hex nuts.
A194 Grade 8M:Stainless AISI 316 heavy hex nuts.
NOTE: There are other grades of A194. Those listed here are the ones we receive the most requests for. For information on other types, Please contact us.
| A194 CHEMICAL PROPERTIES | ||||
| Element | 2, 2H | 7 | 8 (AISI 304) | 8M (AISI 316) |
| Carbon | 0.4% min | 0.37 - 0.49% | 0.08% max | 0.08% max |
| Manganese | 1.0% max | 0.65 - 1.1% | 2.0% max | 2.0% max |
| Phosphorus, max | 0.04% | 0.04% | 0.05% | 0.05% |
| Sulfur, max | 0.05% | 0.04% | 0.03% | 0.03% |
| Silicon | 0.40% max | 0.15 - 035% | 1.0% max | 1.0% max |
| Chromium | 0.75 - 1.2% | 18.0 - 20.0% | 16.0 - 18.0% | |
| Nickel | 8.0 - 11.0% | 10.0 - 14.0% | ||
| Molybdenum | 0.15 - 0.25% | 2.0 - 3.0% | ||
| A194 MECHANICAL PROPERTIES | ||||||
| Grade | Marking | Size | Tempering Temp.Fahrenheit | Proof Load Stress, ksi | Hardness Brinell | |
| Min | Max | |||||
| 2 | 2 | 1/4" - 4" | 0 | 150 | 159 | 352 |
| 2H | 2H | 1/4" - 1-1/2" | 850 | 175 | 248 | 327 |
| 2H | 2H | 1-1/2" - 4" | 850 | 175 | 212 | 327 |
| 7 | 7 | 1/4" - 4" | 1100 | 175 | 248 | 327 |
| 8 | 8 | 1/4" - 4" | - | 80 | 126 | 300 |
| 8M | 8M | 1/4" - 4" | - | 80 | 126 | 300 |
Notes:
The markings shown for all grades of A194 nuts are for cold-formed and hot-forged nuts. When nuts are machined from bar stock, the nut must additionally be marked with the letter B. The letters H & M indicate heat-treated nuts.
Properties shown are those of coarse and 8-pitch thread heavy hex nuts.