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    9 Products

    Grease Fitting Size Identifiers

    Image of Product. Front orientation. Thread Size Identifiers. Grease Fitting Size Identifiers.
    Take the guesswork out of determining the thread type and size of a grease fitting. Screw the shank of a grease fitting into the labeled holes of these identifiers until you find the one that fits.
    For Use With
    For Thread Type
    For Thread
    Location
    For Thread Size
    For Screw
    Size
    For Pipe
    Size
    Wd.
    Ht.
    Thk.
    Each
    Inch/Metric
     
    Aluminum
    Grease FittingsNPT, SAE-LT, BSW, UNF, BSPT, BSF, MetricExternal3/16"-32, 1/4"-20, 1/4"-26, 1/4"-28, 5/16"-18, 5/16"-22, 5/16"-24, 3/8"-20, 3/8"-24, 1/2"-12,
    M6 × 0.75 mm, M6 × 1 mm, M8 × 1 mm, M8 × 1.25 mm, M10 × 1 mm, M10 × 1.5 mm
    1/8", 1/4"
    1/8, 1/4, 3/8
    8 1/2"3"1/4"0000000000000
     

    Grease Fittings

    Thread these fittings into motors, bearings, engine blocks, and other machinery to create a lubrication point. They’re also known as hydraulic grease fittings.
    Straight with Male Thread
    Image of Product. Front orientation. Grease Fittings. Grease Fittings, Straight, Male.
    UNF Thread—UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.
    Zinc-Plated Steel—Zinc-plated steel fittings have mild corrosion resistance.
    Brass—Brass fittings resist corrosion better than zinc-plated steel fittings.
    303 Stainless Steel—303 stainless steel fittings are more corrosion resistant than brass fittings and have good chemical resistance.
    Ball Check Valve—Fittings with a check valve prevent grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.
    Pkg.
    Material
    Overall
    Ht.
    Thread
    Lg.
    Shank
    Lg.
    Hex
    Size
    Max. Pressure,
    psi
    Check Valve
    Type
    Pkg.
    Qty.
    1-9
    10-Up
    5/16"-24 UNF Thread
    Zinc-Plated Steel21/32"5/32"5/32"3/8"10,000Ball1000000000000000000
    Zinc-Plated Steel2 61/64"7/32"2 35/64"11/32"10,000Ball30000000000000000
    Brass19/32"7/32"7/32"11/32"10,000Ball50000000000000000
    303 Stainless Steel19/32"7/32"7/32"11/32"10,000Ball300000000000000000
     
    90° Elbow with Male Thread
    Image of Product. Front orientation. Grease Fittings. Grease Fittings, 90° Elbow, Male.
    UNF Thread—UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.
    Zinc-Plated Steel—Zinc-plated steel fittings have mild corrosion resistance.
    Ball Check Valve—Fittings with a check valve prevent grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.
    Pkg.
    Material
    Overall
    Ht.
    Thread
    Lg.
    Shank
    Lg.
    Hex
    Size
    Max. Pressure,
    psi
    Check Valve
    Type
    Pkg.
    Qty.
    1-9
    10-Up
    5/16"-24 UNF Thread
    Zinc-Plated Steel23/32"5/32"13/64"23/64"8,000Ball10000000000000000000
     
    45° Elbow with Male Thread
    Image of Product. Front orientation. Grease Fittings. Grease Fittings, 45° Elbow, Male.
    UNF Thread—UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.
    Zinc-Plated Steel—Zinc-plated steel fittings have mild corrosion resistance.
    Brass—Brass fittings resist corrosion better than zinc-plated steel fittings.
    303 Stainless Steel—303 stainless steel fittings are more corrosion resistant than brass fittings and have good chemical resistance.
    Ball Check Valve—Fittings with a check valve prevent grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.
    Pkg.
    Material
    Overall
    Ht.
    Thread
    Lg.
    Shank
    Lg.
    Hex
    Size
    Max. Pressure,
    psi
    Check Valve
    Type
    Pkg.
    Qty.
    1-9
    10-Up
    5/16"-24 UNF Thread
    Zinc-Plated Steel59/64"7/32"7/32"11/32"1,450Ball100000000000000000000
    Brass59/64"7/32"7/32"11/32"10,000Ball300000000000000000
    303 Stainless Steel59/64"7/32"7/32"11/32"10,000Ball100000000000000000
     
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