ASTM A194/A194M 7M Heavy Hex Nuts
API 6A Flange Valve Wellhead Heavy Hex Nuts
Dimension Standard: ASME B18.2.2, ASME B18.2.4.6M, ISO 4033, Din934 H=D
Inch Size: 1/4”-4”
Metric Size: M6-M100
Other Available Grade:
ASTM A194/A194M 2H, 2HM, 4, 4L, 7, 7L, 7M, 8, 8M, 16 and so on.
Finish: Plain, Black Oxide, Zinc Plated, Zinc Nickel Plated, Cadmium Plated, PTFE etc.
Packing: Bulk about 25 kgs each carton, 36 cartons each pallet
Advantage: High Quality, Competitive Price, Timely Delivery,Technical Support, Supply Test Reports
Please feel free to contact us for more details.
ASTM A194
The ASTM A194 specification covers carbon, alloy and stainless steel nuts intended for use in high-pressure and/or high-temperature service. Unless otherwise specified, the American National Standard Heavy Hex Series (ANSI B 18.2.2) shall be used. Nuts up to and including 1 inch nominal size shall be UNC Series Class 2B fit. Nuts over 1 inch nominal size shall be either UNC Series Class 2B fit or 8 UN Series Class 2B fit. High strength ASTM A194 grade 2H nuts are common in the marketplace and are often substituted for ASTM A563 grade DH nuts due to the limited availability of DH nuts in certain diameters and finishes. Grades| 2 | Carbon steel heavy hex nuts |
| 2H | Quenched & tempered carbon steel heavy hex nuts |
| 2HM | Quenched & tempered carbon steel heavy hex nuts |
| 4 | Quenched & tempered carbon-molybdenum heavy hex nuts |
| 7 | Quenched & tempered alloy steel heavy hex nuts |
| 7M | Quenched & tempered alloy steel heavy hex nuts |
| 8 | Stainless AISI 304 heavy hex nuts |
| 8M | Stainless AISI 316 heavy hex nuts |
Mechanical Properties Grade Identification Markings
| Grade Identification Marking5 | Specification | Material | Nominal Size, In. | Tempering Temp. °F | Proof Load Stress, ksi | Hardness Rockwell | See Note | |
| Min | Max | |||||||
| ASTM A194 Grade 2 | Medium Carbon Steel | 1/4 - 4 | 1000 | 150 | 159 | 352 | 1,2,3 | |
| ASTM A194 Grade 2H | Medium Carbon Steel, Quenched and Tempered | 1/4 - 4 | 1000 | 175 | C24 | C38 | 1,2 | |
| ASTM A194 Grade 2HM | Medium Carbon Steel, Quenched and Tempered | 1/4 - 4 | 1000 | 150 | 159 | 237 | 1,2,3 | |
| ASTM A194 Grade 4 | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1100 | 175 | C24 | C38 | 1,2 | |
| ASTM A194 Grade 7 | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1100 | 175 | C24 | C38 | 1,2 | |
| ASTM A194 Grade 7M | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1100 | 150 | 159 | 237 | 1,2,3 | |
| ASTM A194 Grade 8 | Stainless AISI 304 | 1/4 - 4 | - | 80 | 126 | 300 | 4 | |
| ASTM A194 Grade 8M | Stainless AISI 316 | 1/4 - 4 | - | 80 | 126 | 300 | 4 | |
| NOTES: 1. 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 and M indicate heat treated nuts. 2. Properties shown are those of coarse and 8-pitch thread heavy hex nuts. 3. Hardness numbers are Brinell Hardness. 4. Nuts that are carbide-solution treated require additional letter A - 8A or 8MA. 5. All nuts shall bear the manufacturer’s identification mark. Nuts shall be legibly marked on one face to indicate the grade and process of the manufacturer. Marking of wrench flats or bearing surfaces is not permitted unless agreed upon between manufacturer and purchaser. Nuts coated with zinc have an asterisk (*) marked after the grade symbol. Nuts coated with cadmium shall have a plus sign (+) marked after the grade symbol. 6. Other less common grades exist, but are not listed here. Inch Fastener Standards. 7th ed. Cleveland: Industrial Fasteners Institute, 2003. N-80 - N-81. | ||||||||
| Element | 2, 2H, and 2HM | 4 | 7 and 7M (AISI 4140) | 8 (AISI 304) | 8M (AISI 316) |
|---|---|---|---|---|---|
| Carbon | 0.40% min | 0.40 - 0.50% | 0.37 - 0.49% | 0.08% max | 0.08% max |
| Manganese | 1.00% max | 0.70 - 0.90% | 0.65 - 1.10% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.040% | 0.035% | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.050% | 0.040% | 0.040% | 0.030% | 0.030% |
| Silicon | 0.40% max | 0.15 - 0.35% | 0.15 - 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.75 - 1.20% | 18.0 - 20.0% | 16.0 - 18.0% | ||
| Nickel | 8.0 - 11.0% | 10.0 - 14.0% | |||
| Molybdenum | 0.20 - 0.30% | 0.15 - 0.25% | 2.00 - 3.00% |
Subscribe to our channel for the latest training videos, climbing tutorials and more! In this video we review the definition of, and considerations for, successful projecting.
On-sighting a route is one of the most gratifying achievements of rock climbing. This is when a climber “sends” a route on their first try, without any “beta” or information about the route. This can be a challenge and even the best climbers have a hard time sending routes their first time.
Projecting routes, or projecting, is when a climber works a climb of a higher difficulty grade (i.e. 5.11) than their onsight skill level (i.e. 5.10), in an effort to break into the next level of their climbing.
If the climber fails their onsight attempt, they may continue to work the route as many times as necessary to send it. Below are a few considerations for successful projecting:
1. Break the route down into individual pieces, sections, bouldery cruxes, or even individual moves.
2. Try to hang a top rope on the route and suss out the movement and the cruxes.
3. At especially hard sequences or moves, try clipping in directly to bolts with a draw (while still on belay—this helps reduce strain on your belayer) and visually explore your options.
4. After a fall, take a good rest. Hang, shake out, and relax. Get your head back in the game, place your feet and hands on the wall, and yell “Climbing!” to your belayer so they know to give you slack and let you climb again.
5. After a fall, the leader will need to ascend back to their last position or bolt in order to try again. If the route is not too steep, they can climb back up or bat man up the rope. If it is fully overhanging and the climber is hanging in mid-air, they will need to “boink” into position.
– Batmanning is where the climber grabs the belay strand of the rope and pulls down while the belayer counterweights the rope and takes in slack, thus making the climber ascend. For this method, the climber must be able to reach the belay strand—that is, the rope that runs through the last quickdraw and back to the belayer.
– When the climber is on such a steep route that they end up hanging in mid air after falling, they can use the “boinking” technique. This is where the climber grabs the rope at arm’s length from their tie-in, does a pull up and then lets go. The belayer is also weighting the rope, such that in an instant of weightlessness, their weight takes in some slack. Several repetitions and the climber will be within reach of the wall again!
6. Get the route wired and dialed so you know the moves, hard sections, rests, stances, and clipping positions. When you feel you know the route well, and can climb the individual sections, try linking larger parts of the climb—and eventually the whole thing!
7. When you have the route dialed, go for the send. If you fail, take a long rest, 30 min to an hour. Rest, stretch, meditate—whatever it takes to get ready for your next attempt.
8. A positive mental attitude goes a long way! If you are having problems with a certain move or sequence, keep your internal dialogue positive and open-minded.
9. Approach each attempt as a learning opportunity. Sometimes all it takes is a slight change of foot, hand, or body positioning.
10. Focus on mindful breathing. Even exaggerated breathing can help force you into a rhythmic pattern.
11. If you’re stuck, maybe try something out of the ordinary. Keep an open mind and let the rock speak to you.
12. When in doubt…give it your all: scream, yell, grunt—whatever it takes! Vocalizations can even help engage your core muscles.
We hope you found this video helpful.
Please remember, climbing is inherently dangerous. Climb at your own risk. Visit https://ClimbingTechTips.com for related comments, additional videos, and community feedback!
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Tư Vấn Và Giải Đáp Về Sản Phẩm CVL® Xin Vui Lòng Liên Hệ: 1900 5555 49.
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