Basic Info.
Product Description
High Strength Black Oxide ASTM A194 2h Hex Heavy Structural Nuts
| STYLE | ANSI ASME ASTM Heavy Hex Nuts Hex Heavy Structural Nuts |
| STANDARD | ASTM A194 2H |
| SUPPLIER | QBH |
| SHOP | qbfastener.en.made-in-china.com |
| SIZE | 1/2"~4" |
| CLASS(Carbon steel) | 2,2H,2HM,4,7,7M |
| Coating(Carbon steel) | black, zinc, HDG, Heat treatment, Dacromet, GEOMET , Customized |
| MATERIAL | Carbon steel |
| PACKING | bulk/ boxes in cartons, bulk in polybags/ buckets, etc. |
| PALLET | solid wood pallet, plywood pallet, ton box/bag, etc. |
Product Description
Choose these nuts for their good corrosion resistance and adherence to Strict-military Standards
for material and construction.
ASTM A194-2HM A194-2H A194-4 A194-7 A194-7M Heavy Hex Nuts with Carbon and Alloy Steel
Teflon Black/Zinc/H.D.G 1/2~4inch.
QBH company will according Standard Specification for Carbon and Alloy Steel Nuts for Bolts for
High Pressure or High Temperature Service, or Both.
This standard is issued under the fixed designation A194/A194M; the number immediately following
the designation indicates the year of original adoption or, in the case of revision, the year of last
revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
| QBH HEAVY HEX NUTS UNIT:MM | ||||
| SIZE | F | H | C | KG/MPCS |
| 1/4 | 12.4--12.7 | 5.54--6.35 | 14.12--14.66 | 5.22 |
| 5/16 | 13.87--14.27 | 7.11--7.98 | 15.8--16.51 | 7.8 |
| 3/8 | 16.99--17.47 | 8.66--9.58 | 19.38--20.17 | 14.25 |
| 7/16 | 18.49--19.05 | 10.24--11.2 | 21.08--22 | 18.88 |
| 1/2 | 21.59--22.23 | 11.79--12.8 | 24.61--25.65 | 30 |
| 9/16 | 23.09--23.83 | 13.36--14.43 | 26.34--27.51 | 37 |
| 5/8 | 26.19--26.97 | 14.91--16.03 | 29.84--31.17 | 54 |
| 3/4 | 30.78--31.75 | 18.03--19.25 | 35.1--36.65 | 88 |
| 7/8--9 | 35.41--36.53 | 21.16--22.48 | 40.36--42.16 | 135 |
| 1--8 | 40.01--41.28 | 24.28--25.7 | 45.61--47.65 | 193 |
| 1-1/8-7 | 46.02-44.6 | 28.93-27.4 | 53.16-51.49 | 269 |
| 1-1/4-7 | 50.8-49.22 | 31.77-30.14 | 58.64-56.83 | 348 |
| 1-3/8-6 | 55.57-53.82 | 35-33.27 | 64.16-62.14 | 463 |
| 1-1/2-6 | 60.32-58.42 | 38.22-36.39 | 69.64-67.46 | 595 |
| 1-5/8-5 | 65.07-63.01 | 41.45-39.52 | 75.15-72.75 | 742 |
| 1-7/8-5 | 74.62-72.23 | 47.9-45.77 | 86.15-83.4 | 1090 |
| 1-3/4-5 | 69.85-67.61 | 44.67-42.64 | 8.64-78.06 | 926 |
| 2-4.5 | 79.37-76.83 | 51.13-48.89 | 91.64-88.71 | 1357 |
| 2-1/4-4.5 | 88-86.05 | 57.17-54.73 | 102.64-99.36 | 1879 |
| 2-1/2-4 | 98.42-95.25 | 63.62-60.98 | 113.63-109.98 | 2555 |
| 2-3/4-4 | 107.95-104.44 | 70.07-67.23 | 124.63-120.59 | 3379 |
| 3-4 | 117.47-113.66 | 76.53-73.48 | 135.63-131.24 | 4315 |
Process Flow
Cold Forging
Annealing treatment (if need) -> wiredrawing -> clod forging -> tapping -> make heat treatment (if need)
-> Finish -> Packing
Hot Forging
Cutting material -> hot forging -> turning -> tapping -> make heat treatment(if need) -> Finish -> Packing
Product Grade
A194-2 , A194-2HM , A194-2H , A194-4 , A194-7 , A194-7M , A194-7L
A194 Grades
| 2 | QBH ASTM A194 Series Carbon Steel Heavy Hex Nuts |
| 2H | Quenched & tempered carbon steel heavy hex nuts |
| 2HM | Quenched & tempered carbon steel heavy hex nuts, 100% hardness tested |
| 4 | Quenched & tempered carbon-molybdenum heavy hex nuts (withdrawn in 2017) |
| 7 | Quenched & tempered alloy steel heavy hex nuts |
| 7M | Quenched & tempered alloy steel heavy hex nuts, 100% hardness tested |
| 7L | Quenched & tempered alloy steel heavy hex nuts, Charpy impact tested |
| 8 | Stainless AISI 304 heavy hex nuts |
| 8M | Stainless AISI 316 heavy hex nuts |
More Details
QBH Materials and Chemical Compstition
1045
| CHEMICAL COMPOSI % | |||||||
| C | Si | Mn | P | S | Cr | Ni | Cu |
| 0.45 | 0.23 | 0.58 | 0.014 | 0.006 | 0.057 | 0.008 | 0.016 |
42CRMO
| CHEMICAL COMPOSI % | ||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| 0.42 | 0.27 | 0.92 | 0.013 | 0.004 | 1.01 | 0.03 | 0.04 | 0.2 |
QBH A194 Chemical Properties
| 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% |
QBH A194 Mechanical Properties
| 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 | 0 | 150 | 159 | 352 | 1,2,3 |
| ASTM A194 Grade 2H | Medium Carbon Steel, Quenched and Tempered | 1/4 - 4 | 850 | 175 | C24 | C38 | 1,2 |
| ASTM A194 Grade 2HM | Medium Carbon Steel, Quenched and Tempered | 1/4 - 4 | 1150 | 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 |
| Supplier/Brand | QBH | ||||||
| Shop | https://qbfastener.en.made-in-china.com/ | ||||||
| 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 | 1150 | 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:
are machined from bar stock, the nut must additionally be marked with the letter 'B'. The letters H
and M indicate heat treated nuts.
Properties shown are those of coarse and 8-pitch thread heavy hex nuts.
Hardness numbers are Brinell Hardness.
Nuts that are carbide-solution treated require additional letter A - 8A or 8MA.
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.
Other less common grades exist, but are not listed here.
Certifications & Package
Our Services
specification and performance.
Quality is guaranteed: Durability testing and critical technical design to enhance fasteners lifetime.
Cost effective: Competitive prices with professional factory supply
Perfect fastening solution with 15+ years experiences to solve your problem: Wide range of parts selection.
Customized Ideal Fasteners: customized services according to the samples and drawings offered.
Free Samples for Standard Fastener from Jiaxing City Qunbang Hardware
We Promise:
1.High quality
2. Competitive price
3. The shortest delivery
4. The fastest response
5. The best service
FAQ
1.What's your experience like?
Our general manager has been engaged in the export of fasteners since 2005.
Our team can provide you with professional fasteners selling and smooth export services.
2.How about your price?
High quality products with reasonable price. Please give me a inquire, We will quoted you a price for you
refer at once.
3. How do you control your quality?
We require the quality control department to inspect every production link of each shipment. And we can provide you MTC and mill certificate when the goods is finished.
4.How about your delivery time?
General speaking, if the goods is in stock, we can delivery them with 2-5days, If the quantity is 1-2container, we can give you with 18-25days,if the quantity is more than 2 container and you are very urgent, we can let factory priority produce
your goods.
5.What is your packing?
Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallets is about 900-960kg, We also can make customer's logo on the cartons. Or we customized cartons according to customers'
requirement.
6.What is your payment term?
We can accept T/T,LC for general order ,Paypal and Western union for small order or samples order.
Awaiting for your kind inquiry! Thanks & best regards!
For more information: http://qbfastener.en.made-in-china.com