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    10 Products
    About Hex Head Screws and Bolts
    industrial info icon

    Choose a hex head fastener with the right threading, thread size, material, and strength for your equipment.

    Tension-Indicating Steel Hex Head Screws

    Image of Product. Front orientation. Contains Annotated, Border. Hex Head Screws. Tension-Indicating Steel Hex Head Screws.
    Image of Product. Front orientation. Hex Head Screws. Tension-Indicating Steel Hex Head Screws, Fully Threaded.

    Fully Threaded

    Image of Product. Front orientation. Hex Head Screws. Tension-Indicating Steel Hex Head Screws, Partially Threaded.

    Partially

    Threaded

    An indicator dot changes from red to black when these screws are properly tightened. If they come loose, the dot changes back to red. Also known as SmartBolts, they let you know when vibration or heavy use loosen screws in high-stress applications, such as valves, pumps, and motors. The head's six flat sides keep wrenches and sockets from slipping and rounding off the drive.
    Length is measured from under the head.
    High-Strength Fastener—Commonly used to fasten components in valves, pumps, motors, and other high-stress applications. These screws have a tensile strength of 125,000 to 160,000 psi.
    Zinc-Yellow-Chromate-Plated Steel—With slightly better corrosion resistance than zinc-plated steel screws, these stand up to more frequent exposure to moisture.
    Head
    Lg.
    Wd.
    Ht.
    Threading
    Thread
    Spacing
    Fastener Strength
    Grade/Class
    Tensile Strength,
    psi
    Tension Indicated,
    lbf
    Indicator
    Temp., ° F
    Each
    High-Strength Zinc-Yellow-Chromate-Plated Steel
     
    1/2"-13
    1 1/2"3/4"3/8"Fully ThreadedCoarse
    SAE Grade 8
    150,00010,0000 to 16593734A120000000
    1 3/4"3/4"3/8"Fully ThreadedCoarse
    SAE Grade 8
    150,00010,0000 to 16593734A14000000
    2"3/4"3/8"Partially ThreadedCoarse
    SAE Grade 8
    150,00010,0000 to 16593734A16000000
    2 1/2"3/4"3/8"Partially ThreadedCoarse
    SAE Grade 8
    150,00010,5000 to 16593734A18000000
    3"3/4"3/8"Partially ThreadedCoarse
    SAE Grade 8
    150,00012,0000 to 16593734A20000000
     
    5/8"-11
    2"15/16"29/64"Fully ThreadedCoarse
    SAE Grade 8
    150,00017,0000 to 16593734A35000000
    2 1/2"15/16"29/64"Partially ThreadedCoarse
    SAE Grade 8
    150,00017,0000 to 16593734A37000000
    3"15/16"29/64"Partially ThreadedCoarse
    SAE Grade 8
    150,00019,0000 to 16593734A39000000
     
    3/4"-10
    2"1 1/8"17/32"Fully ThreadedCoarse
    SAE Grade 8
    150,00026,0000 to 16593734A52000000
    3"1 1/8"17/32"Partially ThreadedCoarse
    SAE Grade 8
    150,00027,0000 to 16593734A56000000
     
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