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Heavy Hex Nuts
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  • ASTM A194 B7 Black Heavy Hex Nuts
  • ASTM A194 B7 Black Heavy Hex Nuts
  • ASTM A194 B7 Black Heavy Hex Nuts
  • ASTM A194 B7 Black Heavy Hex Nuts
  • ASTM A194 B7 Black Heavy Hex Nuts
  • ASTM A194 B7 Black Heavy Hex Nuts

ASTM A194 B7 Black Heavy Hex Nuts

ASTM A194 B7 Black Heavy Hex Nuts are high-strength, heavy-duty hex nuts specifically engineered to pair with ASTM A193 B7 alloy steel bolts in high-temperature and high-pressure process piping, pressure vessel, and petrochemical flange connections. The 2H/7M material grade provides exceptional mechanical strength, hardness, and resistance to stress relaxation at elevated operating temperatures — matching the performance envelope of B7 bolts to ensure the entire bolted joint assembly maintains design preload over its service life.

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    • Specifications
    • Product Details
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    Product Name Heavy Hex Jam Nut
    Specification： Measurement System: Metric/ Imperial System
    Grade: 4.8/6.8/8.8/10.9/12.9/B7/L7/B8/B8M/B8T/B8C
    HS Code: 7318160000
    Material： Carbon steel/ Alloy steel/ Stainless Steel
    thread type: M6-M90; Tr thread; Inch thread, etc.
    Place of Origin China
    Surface: Black oxide/ Zinc/ Phosphate/PTFE/ Dacro/Yellow
    Optional material: 35K/SCM435/4340/4145/1045/40Cr/45# etc.
    Standard: GB/T1229; HG/T20634;ASTM A194; ASME B18.2.2
    Customization: OEM/ODM Accepted
    Applicatioon: General Industry/ Heavy Industry
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