McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    61 Products

    Conductive Plugs

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Conductive Plugs.
    Shield electrical connectors from interference and static while keeping out dust. These plugs have a surface resistivity of less than 105 ohms/sq. to block stray signals from nearby equipment. They also dissipate static charges much more quickly than antistatic plugs. Use them to protect threaded and unthreaded connectors during shipping and storage.
    Polyethylene—Hard and wear resistant to hold up against scrapes and gouges.
    For ID
    For Thread
    Size
    Ht.
    Head
    Dia.
    Max. Surface Resistivity,
    ohm/sq.
    Max. Temp.,
    ° F
    Color
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    15/32"1/2"-28
    		5/8"11/16"1× 10^5140BlackMIL-PRF-817055000000000000000
    19/32"5/8"-24
    		5/8"3/4"1× 10^5140BlackMIL-PRF-81705500000000000000
    23/32"3/4"-20
    		5/8"7/8"1× 10^5140BlackMIL-PRF-81705500000000000000
    27/32"7/8"-20
    		5/8"1 1/16"1× 10^5140BlackMIL-PRF-81705500000000000000
    31/32"1"-20
    		5/8"1 3/16"1× 10^5140BlackMIL-PRF-81705500000000000000
    1 3/32"1 1/8"-18
    		5/8"1 1/4"1× 10^5140BlackMIL-PRF-81705250000000000000
    1 7/32"1 1/4"-18
    		5/8"1 1/2"1× 10^5140BlackMIL-PRF-81705250000000000000
    1 11/32"1 3/8"-18
    		5/8"1 17/32"1× 10^5140BlackMIL-PRF-8170510000000000000
    1 15/32"1 1/2"-18
    		5/8"1 11/16"1× 10^5140BlackMIL-PRF-81705250000000000000
    1 31/32"2"-185/8"2 5/32"1× 10^5140BlackMIL-PRF-81705100000000000000
     

    Antistatic Plugs

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Antistatic Plugs.
    Protect sensitive electronics with plugs that prevent static buildup and keep dust out of connections. They have a surface resistivity of less than 1012 ohms/sq. for packaging and storing components such as semiconductors and resistors. Plugs fit threaded and unthreaded electrical connectors.
    Polyethylene—Hard and wear resistant to hold up against scrapes and gouges.
    For ID
    For Thread
    Size
    Ht.
    Head
    Dia.
    Max. Surface Resistivity,
    ohm/sq.
    Max. Temp.,
    ° F
    Color
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    15/32"1/2"-28
    		5/8"11/16"1× 10^12140PinkMIL-PRF-8170510000000000000000
    19/32"5/8"-24
    		5/8"3/4"1× 10^12140PinkMIL-PRF-817051000000000000000
    23/32"3/4"-20
    		5/8"7/8"1× 10^12140PinkMIL-PRF-817051000000000000000
    27/32"7/8"-20
    		5/8"1 1/16"1× 10^12140PinkMIL-PRF-81705500000000000000
    29/32"1"-20
    		5/8"1 1/8"1× 10^12140PinkMIL-PRF-81705500000000000000
    1 1/32"1 1/8"-18
    		5/8"1 1/4"1× 10^12140PinkMIL-PRF-81705500000000000000
    1 5/32"1 1/4"-18
    		5/8"1 7/16"1× 10^12140PinkMIL-PRF-81705500000000000000
    1 15/32"1 1/2"-18
    		5/8"1 11/16"1× 10^12140PinkMIL-PRF-81705500000000000000
    1 31/32"2"-185/8"2 5/32"1× 10^12140PinkMIL-PRF-81705250000000000000
     

    Screw-In Plugs for Pipe and Tubing

    Threaded for the most secure fit on female pipe and fittings. These plugs protect from damage during shipping and storage. They also keep dust, paint, and coatings from blocking holes and threads.
    For Tapered-Thread Fittings
    Polyethylene—A balance of wear and chemical resistance for use in a variety of environments. These plugs withstand scratches and scrapes as well as mild acids, solvents, and chemical cleaners.
    Pipe
    Size
    For Thread
    Type
    Ht.
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    External Square Drive
    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Screw In, For Round Holes, For Pipe, For Round Shapes, For Tapered-Thread Fittings , External Square Drive.
     
    Polyethylene
    1/8
    		NPT
    		7/16"160Red100000000000000
    1/4
    		NPT
    		1/2"160Red100000000000000
    3/8
    		NPT
    		1/2"160Red100000000000000
    1/2
    		NPT
    		19/32"160Red100000000000000
    3/4
    		NPT
    		5/8"160Red50000000000000
    1
    		NPT
    		23/32"160Red25000000000000
    1 1/4
    		NPT
    		3/4"160Red25000000000000
    1 1/2
    		NPT
    		31/32"160Red10000000000000
     
    External 12-Point Drive
    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Screw In, For Round Holes, For Pipe, For Round Shapes, For Tapered-Thread Fittings , External 12-Point Drive.
     
    Polyethylene
    1/8
    		NPT
    		9/32"160Red100000000000000
    1/4
    		NPT
    		3/8"160Red100000000000000
    3/8
    		NPT
    		11/32"160Red100000000000000
    1/2
    		NPT
    		9/16"160Red100000000000000
    3/4
    		NPT
    		5/8"160Red50000000000000
     

    Screw-On Caps

    Image of Product. Front orientation. Protective Caps. Screw-On Caps, Aluminum.

    Aluminum

    Thread onto male pipe and fittings for the most secure fit. These caps keep dust, paint, and coatings out of threads and pipe. They also protect from damage during manufacturing, shipping, and storage.
    Aluminum—Use aluminum caps instead of steel to prevent corrosion from spreading to aluminum pipe and tubing.
    Thread
    Size
    Type
    For OD
    Inside
    Ht.
    Flexibility
    Max. Temp.,
    ° F
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Aluminum
     
    For Straight-Thread Fittings
    5/16"-24
    		UNF
    		5/16"21/64"Rigid650MIL-C-5501/3500000000000000
    3/8"-24
    		UNF
    		3/8"19/64"Rigid650MIL-C-5501/350000000000000
    7/16"-20
    		UNF
    		7/16"15/32"Rigid650MIL-C-5501/35000000000000
    1/2"-20
    		UNF
    		1/2"7/16"Rigid650MIL-C-5501/350000000000000
    9/16"-18
    		UNF
    		9/16"15/32"Rigid650MIL-C-5501/350000000000000
    5/8"-18
    		UNF
    		5/8"33/64"Rigid650MIL-C-5501/350000000000000
    3/4"-16
    		UNF
    		3/4"35/64"Rigid650MIL-C-5501/350000000000000
    7/8"-14
    		UNF
    		7/8"21/32"Rigid650MIL-C-5501/350000000000000
    1 1/16"-12
    		UN
    		1 1/16"49/64"Rigid650MIL-C-5501/325000000000000
    1 5/16"-12
    		UN
    		1 5/16"49/64"Rigid650MIL-C-5501/325000000000000
    1 5/8"-12
    		UN
    		1 5/8"23/32"Rigid650MIL-C-5501/310000000000000
     

    Conductive Caps

    Image of Product. Front orientation. Protective Caps. Conductive Caps.
    Shield electrical connectors from interference and static and while keeping out dust. These caps have a surface resistivity of less than 105 ohms/sq. to block stray signals and dissipate static charges much more quickly than antistatic caps. They protect threaded and unthreaded connectors during shipping and storage.
    Polyethylene—These tough caps are hard and wear resistant to hold up against scrapes and gouges.
    For
    OD
    For Thread
    Size
    Inside
    Ht.
    Flexibility
    Max. Temp.,
    ° F
    Max. Surface Resistivity,
    ohm/sq.
    Color
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    0.244"1/4"-28
    		15/32"Rigid1401× 10^5BlackMIL-PRF-817055000000000000000
    0.368"3/8"-24
    		1/2"Rigid1401× 10^5BlackMIL-PRF-81705500000000000000
    0.487"1/2"-28
    		1/2"Rigid1401× 10^5BlackMIL-PRF-81705500000000000000
    0.607"5/8"-24
    		1/2"Rigid1401× 10^5BlackMIL-PRF-81705500000000000000
    0.73"3/4"-20
    		1/2"Rigid1401× 10^5BlackMIL-PRF-81705250000000000000
    0.852"7/8"-20
    		1/2"Rigid1401× 10^5BlackMIL-PRF-81705250000000000000
    0.992"1"-20
    		1/2"Rigid1401× 10^5BlackMIL-PRF-81705250000000000000
    1.244"1 1/4"-18
    		9/16"Rigid1401× 10^5BlackMIL-PRF-81705250000000000000
    1.478"1 1/2"-18
    		9/16"Rigid1401× 10^5BlackMIL-PRF-81705250000000000000
     

    Antistatic Caps

    Image of Product. Bottom orientation. Protective Caps. Antistatic Caps.
    Protect sensitive electronics with caps that prevent static buildup and keep dust out of connections. They have a surface resistivity of less than 1012 ohms/sq. for packaging and storing components such as semiconductors and resistors. Caps fit threaded and unthreaded electrical connectors.
    Polyethylene—These tough caps are hard and wear resistant to hold up against scrapes and gouges.
    For
    OD
    For Thread
    Size
    Inside
    Ht.
    Flexibility
    Max. Temp.,
    ° F
    Max. Surface Resistivity,
    ohm/sq.
    Color
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    0.245"1/4"-28
    		1/2"Rigid1401× 10^12PinkMIL-PRF-8170510000000000000000
    0.36"3/8"-24
    		1/2"Rigid1401× 10^12PinkMIL-PRF-817051000000000000000
    0.48"1/2"-28
    		1/2"Rigid1401× 10^12PinkMIL-PRF-817051000000000000000
    0.6"5/8"-24
    		1/2"Rigid1401× 10^12PinkMIL-PRF-817051000000000000000
    0.72"3/4"-20
    		1/2"Rigid1401× 10^12PinkMIL-PRF-817051000000000000000
    0.85"7/8"-20
    		1/2"Rigid1401× 10^12PinkMIL-PRF-81705500000000000000
    0.973"1"-20
    		1/2"Rigid1401× 10^12PinkMIL-PRF-81705500000000000000
    1.231"1 1/4"-18
    		9/16"Rigid1401× 10^12PinkMIL-PRF-81705500000000000000
    1.463"1 1/2"-18
    		9/16"Rigid1401× 10^12PinkMIL-PRF-81705500000000000000
     
    back to top