McMaster-Carr logo
    Filter by
    System of Measurement
    Thread Pitch
    Industrial Info Snippet
    Attribute Image
    Thread Type
    Thread Spacing
    Industrial Info Snippet
    DFARS Specialty Metals
    Industrial Info Compare
    Specifications Met
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Drive Style
    Industrial Info Snippet
    Thread Direction
    Nut Type
    Industrial Info Compare
    End Type
    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)
    85 Products

    Threaded Rods

    Image of Product. Front orientation. Threaded Rods. Threaded Rods.
    Anchor, connect, or hang components in a wide variety of applications, from mounting I-beams to suspending light fixtures.
    Low-Strength Steel
    With a tensile strength of 50,000 psi or 60,000 psi, these rods are often used to suspend light fixtures, cable trays, and conduit from ceilings. They're about half the strength of medium-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also low-strength steel.
    Zinc-Plated Steel—The most common choice for areas with occasional exposure to moisture.
    Lg.
    Tensile Strength,
    psi
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
     
    M2.5 × 0.45 mm
    50 mm50,000Rockwell B49DIN 976100000000000000
    300 mm50,000Rockwell B49DIN 976100000000000000
    1 m50,000Rockwell B49DIN 976100000000000000
     
    Stainless Steel
    More corrosion resistant than steel rods and comparable in strength to low-strength steel.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these rods resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these rods won't degrade when exposed to harsh weather, salt water, and most chemicals.
    Lg.
    Tensile Strength,
    psi
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    M2.5 × 0.45 mm
    12 mm70,000Not RatedDIN 97610000000000000000
    16 mm70,000Not RatedDIN 9761000000000000000
    20 mm70,000Not RatedDIN 9761000000000000000
    25 mm70,000Not RatedDIN 9761000000000000000
    50 mm70,000Not RatedDIN 9761000000000000000
    300 mm70,000Not RatedDIN 97610000000000000
    500 mm70,000Not RatedDIN 97610000000000000
    1 m70,000Not RatedDIN 976100000000000000
    2 m70,000Not RatedDIN 976100000000000000
     
    Highly Corrosion-Resistant 316 Stainless Steel
     
    M2.5 × 0.45 mm
    12 mm70,000Not RatedDIN 97650000000000000
    25 mm70,000Not RatedDIN 976500000000000000
    300 mm70,000Not RatedDIN 97610000000000000
    500 mm70,000Not RatedDIN 97610000000000000
    1 m70,000Not RatedDIN 976100000000000000
     
    Brass
    Brass—Conductive and nonmagnetic, brass rods are commonly used to secure electrical equipment, such as circuit board assemblies and mounting brackets, inside enclosures.
    Lg.,
    m
    Tensile Strength,
    psi
    Hardness
    Specs.
    Met
    Each
    Brass
     
    M2.5 × 0.45 mm
    150,000Rockwell B55DIN 976000000000000000
     

    Press-Fit Studs

    Image of Product. Front orientation. Studs. Press-Fit Studs.
    Press these studs into a drilled or punched hole with an arbor press or similar pressure tool. Also known as self-clinching studs, ribs under the head hold the stud firmly in place. Length listed is overall length.
    Zinc-Plated Steel—The most common choice for areas with occasional exposure to moisture.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these studs resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Lg.,
    mm
    PEM® Part
    No.
    Thread
    Lg., mm
    For Min. Material
    Thk., mm
    For Min. Lg. Between Hole
    Ctr. and Sheet Edge, mm
    For Hole
    Dia., mm
    Hole Size Tolerance,
    mm
    Drill Bit
    Size, mm
    Base Dia.,
    mm
    Tensile
    Strength
    Hardness
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
     
    M2.5 × 0.45 mm
    6FH-M2.5-641.0005.52.50.000 to 0.0840 Ga.
    		4.5Not RatedNot Rated5000000000000000
    10FH-M2.5-1081.0005.52.50.000 to 0.0840 Ga.
    		4.5Not RatedNot Rated500000000000000
    15FH-M2.5-15131.0005.52.50.000 to 0.0840 Ga.
    		4.5Not RatedNot Rated500000000000000
    18FH-M2.5-18161.0005.52.50.000 to 0.0840 Ga.
    		4.5Not RatedNot Rated250000000000000
     
    18-8 Stainless Steel
     
    M2.5 × 0.45 mm
    6FHS-M2.5-641.00052.50.000 to 0.082.5
    		3.7Not RatedNot Rated250000000000000
    8FHS-M2.5-861.00052.50.000 to 0.082.5
    		3.7Not RatedNot Rated250000000000000
    10FHS-M2.5-1081.00052.50.000 to 0.082.5
    		3.7Not RatedNot Rated250000000000000
    12FHS-M2.5-12101.00052.50.000 to 0.082.5
    		3.7Not RatedNot Rated250000000000000
    15FHS-M2.5-15131.00052.50.000 to 0.082.5
    		3.7Not RatedNot Rated250000000000000
     

    Coupling Nuts

    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.
    Low-Strength Steel
    Rated Grade 2 or lower, these are about half as strong as medium-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Black-Oxide Steel—A dark, matte coating creates a finished look. Nuts offer minimal corrosion resistance, so they're best for dry environments.
    Each
    Thread Size
    Lg.,
    mm
    Wd.,
    mm
    Threading
    1-9
    10-49
    50-Up
    Zinc-Plated Steel
    M2.5 × 0.45 mm64.5Fully Threaded000000000000000000000000
    M2.5 × 0.45 mm124.5Fully Threaded0000000000000000000000
     
    Black-Oxide Steel
    M2.5 × 0.45 mm64.5Fully Threaded000000000000000000000
     
    Corrosion-Resistant Stainless Steel
    18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They resist rust in wet and outdoor environments, but won't hold up to the harsh chemicals that 316 stainless steel can.
    Each
    Thread Size
    Lg.,
    mm
    Wd.,
    mm
    Threading
    1-9
    10-49
    50-Up
    18-8 Stainless Steel
    M2.5 × 0.45 mm64Fully Threaded000000000000000000000000
     
    Black-Oxide 18-8 Stainless Steel
    M2.5 × 0.45 mm64Fully Threaded000000000000000000000
     
    Plastic
    Nylon 6/6—Slippery and abrasion resistant, these nuts thread on smoothly and stand up to daily wear and tear. Nylon will swell and weaken when exposed to moisture, so it's best for dry environments.
    Temp.,
    ° F
    Each
    Thread Size
    Lg.,
    mm
    Wd.,
    mm
    Threading
    Min.
    Max.
    Color
    1-9
    10-49
    50-Up
    Nylon 6/6
    M2.5 × 0.45 mm64.5Fully Threaded-40250Off-White0000000000000000000000
     

    Male Heat-Set Threaded Inserts for Plastic

    Image of Product. Front orientation. Threaded Inserts. Male Heat-Set Threaded Inserts for Plastic.
    Mount components directly to plastic parts. The male threaded rod on these inserts creates an attachment point. Heat them on a hot plate and press the knurled end into a straight hole. The heat melts the surrounding plastic and as it cools, it hardens around the knurls.
    Brass—Conductive and nonmagnetic, these inserts are useful for electrical applications. They resist moisture but aren't as strong as steel inserts.
    Thread Size
    Thread
    Lg., mm
    Installed
    Lg., mm
    Drill Bit
    Size
    For Max.
    Hole Dia., mm
    Each
    Standard Profile
     
    Brass
    M2.5 x 0.45 mm6.355.722 Ga.
    		3.900000000000000
     

    Female Threaded Hex Standoffs

    Image of Product. Front orientation. Standoffs. Female Threaded Hex Standoffs.
    Image of Attribute. Front orientation. Contains Annotated. Standoffs. Female Threaded Hex Standoffs.
    Image of Attribute. Threaded on Both Ends. Front orientation. Threaded on Both Ends. Female Threaded Hex Standoffs.

    Threaded on

    Both Ends

    Stack male-threaded components and create a clean, flush connection between them. To securely tighten standoffs, grip the flat sides of the hex body with a wrench.
    Corrosion-Resistant 18-8 Stainless Steel—The choice for wet and outdoor environments, these standoffs resist rusting. They're strong enough for most jobs, but won't withstand stress as well as steel.
    Zinc-Plated Carbon Steel—Best for dry environments since moisture will cause these standoffs to rust.
    Lightweight Aluminum—One-third the weight of steel, these standoffs are commonly used in applications with weight limitations. They resist rust as well as stainless steel, but they're not as strong.
    Each
    Lg.,
    mm
    Hex Size,
    mm
    Threading
    Min. Thread
    Lg., mm
    Specs.
    Met
    1-99
    100-499
    500-Up
    Corrosion-Resistant 18-8 Stainless Steel
     
    M2.5 × 0.45 mm
    104.5Threaded on Both Ends4.8ASTM A582000000000000000000000000
    124.5Threaded on Both Ends4.8ASTM A582000000000000000000000
    144.5Threaded on Both Ends4.8ASTM A582000000000000000000000
    164.5Threaded on Both Ends4.8ASTM A582000000000000000000000
    194.5Threaded on Both Ends4.8ASTM A582000000000000000000000
    204.5Threaded on Both Ends4.8ASTM A582000000000000000000000
    254.5Threaded on Both Ends4.8ASTM A582000000000000000000000
    374.5Threaded on Both Ends4.8ASTM A582000000000000000000000
     
    Zinc-Plated Carbon Steel
     
    M2.5 × 0.45 mm
    194.5Threaded on Both Ends4.7ASTM A108000000000000000000000
    204.5Threaded on Both Ends4.7ASTM A108000000000000000000000
    254.5Threaded on Both Ends4.7ASTM A108000000000000000000000
    374.5Threaded on Both Ends4.7ASTM A108000000000000000000000
     
    Lightweight Aluminum
     
    M2.5 × 0.45 mm
    164.5Threaded on Both Ends4.8—000000000000000000000
    194.5Threaded on Both Ends4.8—000000000000000000000
    204.5Threaded on Both Ends4.8—000000000000000000000
    254.5Threaded on Both Ends4.8—000000000000000000000
    374.5Threaded on Both Ends4.8—000000000000000000000
     

    Metric-to-Metric Female Hex Thread Adapters

    Image of Product. Front orientation. Contains Annotated. Thread Adapters. Metric-to-Metric Female Hex Thread Adapters.
    Image of Attribute. Front orientation. Contains Annotated. Thread Adapters. Metric-to-Metric Female Hex Thread Adapters.
    Increase or decrease metric thread size from one male-threaded part to another. Commonly used to connect two differently sized threaded rods, these adapters have a hex-shaped body, so you can tighten them with a standard wrench. You can also use them to change thread pitch or convert a male-threaded connection to a female-threaded connection. Small adapters can work as threaded standoffs, positioning and separating circuit boards and other components in assemblies.
    Black-Oxide Steel—Black-oxide steel adapters have a finish that won’t chip or rub off. They match the aesthetics of many systems. They resist rust in indoor and dry environments but will degrade in outdoor and highly corrosive environments.
    Zinc-Plated Steel—Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.
    Aluminum—Aluminum adapters are about one third of the weight of steel adapters. They resist corrosion in wet environments.
    18-8 Stainless Steel—18-8 stainless steel adapters resist corrosion in wet environments. However, they will corrode when exposed to salt water and other chloride solutions.
    316 Stainless Steel—316 stainless steel adapters withstand wet environments and resist corrosion caused by salt water and harsh chemicals.
    ASTM A108, ASTM A276, ASTM A582, and ASTM B633—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.
    Thread
    Lg., mm
    Thread
    Fit
    Hex,
    mm
    Each
    Thread Size
    (A)
    Thread Size
    (B)
    (A)
    (B)
    (A)
    (B)
    Size
    Length
    Specs. Met
    Tensile Strength,
    psi
    Hardness
    Certificate
    Form
    Certificate Type
    1-9
    10-Up
    Black-Oxide Steel
    M2.5 x 0.45 mmM3 x 0.5 mm4.86.4Metric Class 6H
    		Metric Class 6H
    		4.525ASTM A10878,000Rockwell B85——00000000000000000000
    M3.5 x 0.6 mmM2.5 x 0.45 mm9.54.8Metric Class 6H
    		Metric Class 6H
    		637ASTM A10878,000Rockwell B85——0000000000000000000
    M4 x 0.7 mmM2.5 x 0.45 mm11.14.8Metric Class 6H
    		Metric Class 6H
    		637ASTM A10878,000Rockwell B85——0000000000000000000
     
    Zinc-Plated Steel
    M2.5 x 0.45 mmM3 x 0.5 mm4.86.4Metric Class 6H
    		Metric Class 6H
    		4.525ASTM A108, ASTM B63378,000Rockwell B85Digital
    		Material Certificate with Traceable Lot Number
    		000000000000000000
    M3.5 x 0.6 mmM2.5 x 0.45 mm9.54.8Metric Class 6H
    		Metric Class 6H
    		637ASTM A108, ASTM B63378,000Rockwell B85Digital
    		Material Certificate with Traceable Lot Number
    		0000000000000000000
    M4 x 0.7 mmM2.5 x 0.45 mm11.14.8Metric Class 6H
    		Metric Class 6H
    		637ASTM A108, ASTM B63378,000Rockwell B85——0000000000000000000
     
    Aluminum
    M2.5 x 0.45 mmM3 x 0.5 mm4.86.4Metric Class 6H
    		Metric Class 6H
    		4.525—45,000Rockwell B56——00000000000000000
    M3.5 x 0.6 mmM2.5 x 0.45 mm9.54.8Metric Class 6H
    		Metric Class 6H
    		637—45,000Rockwell B56——00000000000000000
    M4 x 0.7 mmM2.5 x 0.45 mm11.14.8Metric Class 6H
    		Metric Class 6H
    		637—45,000Rockwell B56——00000000000000000
     
    18-8 Stainless Steel
    M2.5 x 0.45 mmM3 x 0.5 mm4.86.4Metric Class 6H
    		Metric Class 6H
    		4.525ASTM A58285,000Rockwell B80——0000000000000000000
    M3 x 0.35 mmM2.5 x 0.45 mm33Metric Class 6H
    		Metric Class 6H
    		815ASTM A58285,000Rockwell B80——00000000000000000
    M3.5 x 0.6 mmM2.5 x 0.45 mm9.54.8Metric Class 6H
    		Metric Class 6H
    		637ASTM A58285,000Rockwell B80——0000000000000000000
    M4 x 0.7 mmM2.5 x 0.45 mm11.14.8Metric Class 6H
    		Metric Class 6H
    		637ASTM A58285,000Rockwell B80——0000000000000000000
     
    316 Stainless Steel
    M3 x 0.35 mmM2.5 x 0.45 mm33Metric Class 6H
    		Metric Class 6H
    		815ASTM A27675,000Rockwell B83Digital
    		Material Certificate with Traceable Lot Number
    		00000000000000000
    M3 x 0.5 mmM2.5 x 0.45 mm33Metric Class 6H
    		Metric Class 6H
    		815ASTM A27675,000Rockwell B83Digital
    		Material Certificate with Traceable Lot Number
    		00000000000000000
     

    Inch-to-Metric Female Hex Thread Adapters

    Image of Product. Front orientation. Contains Annotated. Thread Adapters. Inch-to-Metric Female Hex Thread Adapters.
    Image of Attribute. Front orientation. Contains Annotated. Thread Adapters. Inch-to-Metric Female Hex Thread Adapters.
    Adapt threaded rods from inch to metric. These adapters connect two male-threaded fasteners, so you can change the gender of a mating part or increase or decrease its thread size. The hex-shaped body fits into the head of a standard wrench. Small adapters can also be used as standoffs, positioning and separating circuit boards and other components in assemblies.
    Black-Oxide Steel—Choose black-oxide steel adapters to match the aesthetics of your system or for their mild corrosion resistance. The finish won't chip or rub off. They resist rust in indoor and dry environments, but avoid using them in corrosive environments.
    Zinc-Plated Steel—Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.
    Aluminum—At about a third of the weight of steel adapters, aluminum adapters are the lightest we offer. They resist corrosion in wet environments.
    18-8 Stainless Steel—18-8 stainless steel adapters resist corrosion caused by water. They're good for wet and damp environments but will corrode when exposed to salt water and other chloride solutions.
    ASTM A108, ASTM A582, and ASTM B633—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.
    Thread
    Lg.
    Thread
    Fit
    Hex
    Each
    Thread
    Size (A)
    Thread Size
    (B)
    (A)
    (B),
    mm
    (A)
    (B)
    Size
    Length
    Specs. Met
    Tensile Strength,
    psi
    Hardness
    Certificate
    Form
    Certificate Type
    1-9
    10-Up
    Black-Oxide Steel
    2-56
    		M2.5 x 0.45 mm0.187"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"ASTM A10878,000Rockwell B85Digital
    		Material Certificate with Traceable Lot Number
    		00000000000000000000
    4-40
    		M2.5 x 0.45 mm1/4"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"ASTM A10878,000Rockwell B85——000000000000000000
    6-32
    		M2.5 x 0.45 mm3/8"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"ASTM A10878,000Rockwell B85Digital
    		Material Certificate with Traceable Lot Number
    		000000000000000000
    8-32
    		M2.5 x 0.45 mm0.437"4.8Unified Standard Class 2B
    		Metric Class 6H
    		1/4"1 1/2"ASTM A10878,000Rockwell B85——0000000000000000000
     
    Zinc-Plated Steel
    2-56
    		M2.5 x 0.45 mm0.187"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"ASTM A108, ASTM B63378,000Rockwell B85——000000000000000000
    4-40
    		M2.5 x 0.45 mm1/4"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"ASTM A108, ASTM B63378,000Rockwell B85——000000000000000000
    6-32
    		M2.5 x 0.45 mm3/8"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"ASTM A108, ASTM B63378,000Rockwell B85Digital
    		Material Certificate with Traceable Lot Number
    		000000000000000000
    8-32
    		M2.5 x 0.45 mm0.437"4.8Unified Standard Class 2B
    		Metric Class 6H
    		1/4"1 1/2"ASTM A108, ASTM B63378,000Rockwell B85Digital
    		Material Certificate with Traceable Lot Number
    		0000000000000000000
     
    Aluminum
    2-56
    		M2.5 x 0.45 mm0.187"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"—45,000Rockwell B56——00000000000000000
    4-40
    		M2.5 x 0.45 mm1/4"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"—45,000Rockwell B56——00000000000000000
    6-32
    		M2.5 x 0.45 mm3/8"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"—45,000Rockwell B56Digital
    		Material Certificate with Traceable Lot Number
    		00000000000000000
    8-32
    		M2.5 x 0.45 mm0.437"4.8Unified Standard Class 2B
    		Metric Class 6H
    		1/4"1 1/2"—45,000Rockwell B56——00000000000000000
     
    18-8 Stainless Steel
    2-56
    		M2.5 x 0.45 mm0.187"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"ASTM A58285,000Rockwell B80Digital
    		Material Certificate with Traceable Lot Number
    		0000000000000000000
    4-40
    		M2.5 x 0.45 mm1/4"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"ASTM A58285,000Rockwell B80——0000000000000000000
    6-32
    		M2.5 x 0.45 mm3/8"4.8Unified Standard Class 2B
    		Metric Class 6H
    		3/16"1"ASTM A58285,000Rockwell B80——0000000000000000000
    8-32
    		M2.5 x 0.45 mm0.437"4.8Unified Standard Class 2B
    		Metric Class 6H
    		1/4"1 1/2"ASTM A58285,000Rockwell B80——0000000000000000000
     

    Female Threaded Hex Plastic Standoffs

    Image of Product. Front orientation. Standoffs. Female Threaded Hex Plastic Standoffs.
    Image of Attribute. Front orientation. Contains Annotated. Standoffs. Female Threaded Hex Plastic Standoffs.
    Image of Attribute. Threaded on Both Ends. Front orientation. Threaded on Both Ends. Female Threaded Hex Plastic Standoffs.

    Threaded on

    Both Ends

    Lightweight, nonconductive, and naturally rust-resistant. Screw these standoffs onto panels and equipment covers to separate, position and connect components. To securely tighten standoffs, grip the flat sides of the hex body with a wrench.
    Nylon 6/6—Lightweight and stand up to daily wear and tear. Nylon swells and weakens when exposed to moisture, so these standoffs are best for dry environments.
    Each
    Lg.,
    mm
    Hex Size,
    mm
    Threading
    Min. Thread
    Lg., mm
    Temp. Range,
    ° F
    Specs.
    Met
    1-99
    100-499
    500-Up
    Nylon 6/6
     
    M2.5 × 0.45 mm
    204.5Threaded on Both Ends4.7-40 to 250ASTM D4066000000000000000000000000
    254.5Threaded on Both Ends4.7-40 to 250ASTM D4066000000000000000000000
    374.5Threaded on Both Ends4.7-40 to 250ASTM D4066000000000000000000000
     
    back to top