ASTM A194 7M Heavy Hex Nuts

ASTM A194 7M Heavy Hex Nuts

Short Description:

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 ...


  • FOB Price: US $0.5 - 9,999 / Piece
  • Min.Order Quantity: 100 Piece/Pieces
  • Supply Ability: 10000 Piece/Pieces per Month
  • Port: Ningbo
  • Payment Terms: L/C,D/A,D/P,T/T
  • Product Detail

    Product Tags

    Product Description

    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.

    Product Standards

    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
    2
    ASTM A194 Grade 2
    Medium Carbon Steel
    1/4 - 4
    1000
    150
    159
    352
    1,2,3
    2H
    ASTM A194 Grade 2H
    Medium Carbon Steel, Quenched and Tempered
    1/4 - 4
    1000
    175
    C24
    C38
    1,2
    2HM
    ASTM A194 Grade 2HM
    Medium Carbon Steel, Quenched and Tempered
    1/4 - 4
    1000
    150
    159
    237
    1,2,3
    4
    ASTM A194 Grade 4
    Medium Carbon Alloy Steel, Quenched and Tempered
    1/4 - 4
    1100
    175
    C24
    C38
    1,2
    7
    ASTM A194 Grade 7
    Medium Carbon Alloy Steel, Quenched and Tempered
    1/4 - 4
    1100
    175
    C24
    C38
    1,2
    7M
    ASTM A194 Grade 7M
    Medium Carbon Alloy Steel, Quenched and Tempered
    1/4 - 4
    1100
    150
    159
    237
    1,2,3
    8
    ASTM A194 Grade 8
    Stainless AISI 304
    1/4 - 4
    -
    80
    126
    300
    4
    8M
    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.

    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%

    Product Certificates

    1
    2
    3
    4
    A325M Test Report
    A563M 10S Test Report

    About us

    Testing Lab

    1. Strength Testing Facility
    2. Impact Testing Facility
    3. Hardness Testing Facility
    5. Metallographic Analysis Facility

    Workshop

    1 Annealing Furnace
    2 Cold Forging Line
    3 Hot Forging Line
    4 Heat Treatment line
    5 Heat Treatment Line
    6 Thread Rolling  Line
    7 Thread Rolling  Line
    8 Thread Rolling  Line
    9 CNC Lathe Workshop
    10 CNC Machining Center

    Warehouse

    3 Carton and Pallet
    5 Threaded Rod Packing
    2 Metal Keg and Pallet
    6 Threaded Rod Packing
    4 Threaded Rod Packing
    1 Stock Shelf

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