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 1/2~4

Place of Origin CHINA
Brand Name QBH
Certification ISO9001
Model Number 1/2 to 4inch
Minimum Order Quantity 900kg
Price 1100USD-1500USD/TON
Packaging Details 25kg Carton+900kg/Pallet
Delivery Time 30days
Payment Terms L/C, T/T,OA
Supply Ability 600TON/MONTH
Product Details
Material Carbon Steel Size 1/2"~4"
Surface Treatment Plain,Zinc,Black,H.D.G Grade 2,2H,2HM,4,7,7M
Process Cold Forging,Hot Forging Sample Free Sample
Packaging 25kg Carton+900kg/Pallet Standard ANSI ASME HEAVY HEX NUTS
Function Fastening,Fastening And Decoration,Connection,Prevention Of Thievery Advantage We Can Manufacture According To Client Design,OEM / ODM / Customized Service Provided
Oem Yes,welcome Thread UNC,UNF
Package Suitable For Sea And Air Transportation Or As Required,Cartons&pallets Or According To Custom
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Product Description

 

Specification

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.

 

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 1/2~4 0

 

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 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
 

 

 

 

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

 

 

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%
 

 

 

A194 Mechanical Properties

Grade Identification Marking5 Specification Material Nominal Size, In. Tempering Temp. °F Proof Load Stress, ksi Hardness Rockwell See Note
Min Max
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 1/2~4 1 ASTM A194 Grade 2 Medium Carbon Steel 1/4 - 4 0 150 159 352 1,2,3
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 1/2~4 2 ASTM A194 Grade 2H Medium Carbon Steel, Quenched and Tempered 1/4 - 4 850 175 C24 C38 1,2
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 1/2~4 3 ASTM A194 Grade 2HM Medium Carbon Steel, Quenched and Tempered 1/4 - 4 1150 150 159 237 1,2,3
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 1/2~4 4 ASTM A194 Grade 4 Medium Carbon Alloy Steel, Quenched and Tempered 1/4 - 4 1100 175 C24 C38 1,2
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 1/2~4 5 ASTM A194 Grade 7 Medium Carbon Alloy Steel, Quenched and Tempered 1/4 - 4 1100 175 C24 C38 1,2
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 1/2~4 6 ASTM A194 Grade 7M Medium Carbon Alloy Steel, Quenched and Tempered 1/4 - 4 1150 150 159 237 1,2,3
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 1/2~4 7 ASTM A194 Grade 8 Stainless AISI 304 1/4 - 4 - 80 126 300 4
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 1/2~4 8 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.
  6. Other less common grades exist, but are not listed here.

 

 

Finish

 

Hot Dip Galvanized Mechanical Galvanized
Zinc Plated Cadmium Plated
Yellow Zinc Plated Yellow Cadmium Plated
Blue Xylan® or Blue Teflon® Green Xylan® or Green Teflon®
Black Oxide Plain Surface

 

 

PACKING

 

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

 

 

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

 

 

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

 

 

 

 

The advantages of QBH

  • QBH brand sales to the main quality assurance.
  • Years of export trade management, excellent service, word-of-mouth guarantee.
  • By working with TUV,escort for quality.
  • Customization of non-standard parts can be made according to customer's requirements and drawings.
  • For quality customers,we can provide a certain credit period.

 

 

 

Product application

 

ASTM A194 2H Heavy Hex Nuts are core products. JIAXING CITY QUNBANG HARDWARE CO.,LTD is an ISO 9001:2015 certified fastener manufacturer ,As directed by the ASTM A-193 specification, these are heavy hex nut pattern nuts that are engineered to mate with A193 B7 Studs. We carry sizes up to 6″ in diameter in both UNC and UNF thread pitch. For sizes 1″ in diameter and larger, 8-TPI is also available as it is commonly used for applications in flanging together pipe and valves.

We also can produce teflon nuts which some refer to as PTFE 2H Nuts. Teflon blue coated nuts are also very commonly used in the industry as fluropolymer coated fasteners allow for an excellent resistance to corrosion while promising an easy on/easy off assembly.

 

Also known as heavy hex nuts, these nuts are about 10% wider and taller than standard hex nuts and distribute the load over a large area. Grade 2H nuts are comparable in strength to Grade 9 bolts. They're about 20% stronger than high-strength steel nuts and are used in heavy machinery, such as earth-moving equipment.

 

Zinc yellow-chromate plated steel nuts resist corrosion in wet environments.

 

Hot-dipped galvanized steel nuts have a thick coating for better corrosion resistance than zinc-plated steel nuts. They must be used with other hot-dipped galvanized fasteners.

 

Black-oxide steel nuts have a dark surface color and are mildly corrosion resistant in dry environments.

 

PTFE-coated steel nuts have a slippery surface to resist sticking during installation. They're resistant to chemicals and salt water.

 

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 1/2~4 9

 

 

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 1/2~4 10

 

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 1/2~4 11