McMaster-Carr logo
    Filter by
    System of Measurement
    Drive Style
    Industrial Info Snippet
    Rounded Head Style
    Military Specification
    Fastener Head Type
    Threadlocker Type
    Certification
    O-Ring Material
    Locking Type
    Application
    DFARS Specialty Metals
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Maximum O-Ring Temperature
    Maximum Threadlocker Temperature
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Minimum O-Ring Temperature
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    28 Products

    Sealing Thread-Locking Stainless Steel Pan Head Phillips Screws

    Image of Product. Front orientation. Rounded Head Screws. Sealing Thread-Locking Stainless Steel Pan Head Phillips Screws.
    Image of Product. Back orientation. Contains Annotated. Rounded Head Screws. Sealing Thread-Locking Stainless Steel Pan Head Phillips Screws.
    Keep parts from coming loose on machinery with mild vibration while keeping out contaminants and locking in air and fluid. These pan head screws have a rubber O-ring under the head that compresses to form a tight seal as you tighten them. With a nylon-patch threadlocker bonded to the threads, these screws save you the time and mess of adding it yourself. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals. The Phillips drive aligns easily with drivers and withstands more torque than slotted drives, but drivers slip when you apply too much force.
    Length is measured from under the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.
    Silicone Rubber O-Ring—Silicone rubber maintains its integrity when exposed to water and some chemicals, such as ammonium hydroxide. However, these seals degrade when exposed to oil, grease, and fuel.
    Military Specification—These screws are manufactured and tested to meet strict U.S. military standards for material and construction.
    Head
    Lg.
    Dia.
    Ht.
    Threading
    Tensile Strength,
    psi
    Threadlocker
    Type
    For Max.
    Hole Dia.
    Max. Pressure,
    psi
    O-Ring Temp.
    Range, ° F
    Threadlocker
    Temp. Range, ° F
    Mil. Spec.
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel with Silicone Rubber O-Ring
     
    4-40
    1/4"0.238"0.08"Fully Threaded70,000Nylon Patch0.127"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-1L, NASM3212, NASM82496593802A42100000
    5/16"0.238"0.08"Fully Threaded70,000Nylon Patch0.127"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-2L, NASM3212, NASM82496593802A4230000
    3/8"0.238"0.08"Fully Threaded70,000Nylon Patch0.127"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-3L, NASM3212, NASM82496593802A4250000
    1/2"0.238"0.08"Fully Threaded70,000Nylon Patch0.127"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-5L, NASM3212, NASM82496593802A4290000
    5/8"0.238"0.08"Fully Threaded70,000Nylon Patch0.127"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-7L, NASM3212, NASM82496593802A4330000
    3/4"0.238"0.08"Fully Threaded70,000Nylon Patch0.127"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-8L, NASM3212, NASM82496593802A4380000
     
    6-32
    1/4"0.294"0.097"Fully Threaded70,000Nylon Patch0.150"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-11L, NASM3212, NASM82496593802A5210000
    5/16"0.294"0.097"Fully Threaded70,000Nylon Patch0.150"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-12L, NASM3212, NASM82496593802A5230000
    3/8"0.294"0.097"Fully Threaded70,000Nylon Patch0.150"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-13L, NASM3212, NASM82496593802A5250000
    1/2"0.294"0.097"Fully Threaded70,000Nylon Patch0.150"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-15L, NASM3212, NASM82496593802A5290000
    5/8"0.294"0.097"Fully Threaded70,000Nylon Patch0.150"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-17L, NASM3212, NASM82496593802A53300000
    3/4"0.294"0.097"Fully Threaded70,000Nylon Patch0.150"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-18L, NASM3212, NASM82496593802A53800000
    1"0.294"0.097"Fully Threaded70,000Nylon Patch0.150"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-20L, NASM3212, NASM82496593802A5450000
    1 1/4"0.294"0.097"Fully Threaded70,000Nylon Patch0.150"1,500-80 to 400-40 to 225MIL-DTL-18240, NASM3212, NASM82496593802A5480000
    1 1/2"0.294"0.097"Fully Threaded70,000Nylon Patch0.150"1,500-80 to 400-40 to 225MIL-DTL-18240, NASM3212, NASM82496Material Certificate
    593802A55300000
     
    8-32
    1/4"0.347"0.115"Fully Threaded70,000Nylon Patch0.177"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-21L, NASM3212, NASM82496593802A6210000
    3/8"0.347"0.115"Fully Threaded70,000Nylon Patch0.177"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-23L, NASM3212, NASM82496593802A62500000
    1/2"0.347"0.115"Fully Threaded70,000Nylon Patch0.177"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-25L, NASM3212, NASM82496593802A62900000
    3/4"0.347"0.115"Fully Threaded70,000Nylon Patch0.177"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-28L, NASM3212, NASM82496593802A63800000
    1"0.347"0.115"Fully Threaded70,000Nylon Patch0.177"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-30L, NASM3212, NASM82496593802A64500000
     
    10-32
    3/8"0.403"0.133"Fully Threaded70,000Nylon Patch0.200"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-31L, NASM3212, NASM82496593802A72500000
    1/2"0.403"0.133"Fully Threaded70,000Nylon Patch0.200"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-33L, NASM3212, NASM82496593802A7290000
    5/8"0.403"0.133"Fully Threaded70,000Nylon Patch0.200"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-35L, NASM3212, NASM82496593802A73300000
    3/4"0.403"0.133"Fully Threaded70,000Nylon Patch0.200"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-36L, NASM3212, NASM82496593802A7380000
    1"0.403"0.133"Fully Threaded70,000Nylon Patch0.200"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-38L, NASM3212, NASM82496593802A7450000
     
    1/4"-20
    1/2"0.517"0.175"Fully Threaded70,000Nylon Patch0.265"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-49L, NASM3212, NASM82496593802A82900000
    3/4"0.517"0.175"Fully Threaded70,000Nylon Patch0.265"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-52L, NASM3212, NASM82496593802A83800000
    1"0.517"0.175"Fully Threaded70,000Nylon Patch0.265"1,500-80 to 400-40 to 225MIL-DTL-18240, MS3212-54L, NASM3212, NASM82496593802A84500000
     
    back to top