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    Nuts & Bolts

    Careful attention is given to selecting the correct flange and gasket, whilst selection of the correct fasteners is often neglected. All elements of a flange assembly must be suitable if a leak free joint is to be obtained and maintained; bolts, studs, and nuts, are the fasteners that allow this to occur. This section deals with bolts, studs, screws, nuts, washers, bolting procedure, and their importance with relation to flanges.

    Bolting Criteria

    Bolting criteria for a given flange is determined by the associated standard. For example, a flange of a certain size and class may have the following pre-defined factors:

    • Number of bolts required.
    • Length of bolt required. 
    • Diameter of bolt required.
    • Material of bolt required. 
    • Position of bolts on the flange blade. 

    The number of bolts required will always be a multiple of 4 e.g. 4, 8, 12, 16 etc. As the size and class of a flange increases, so too does the number of bolts required and their diameter.

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    Picture of 50nb PN6 CORE Flange Pack

    50nb PN6 CORE Flange Pack

    COREFP6050
    50nb (2") PN6 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 65nb PN6 CORE Flange Pack

    65nb PN6 CORE Flange Pack

    COREFP6065
    65nb (2.1/2") PN6 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 80nb PN6 CORE Flange Pack

    80nb PN6 CORE Flange Pack

    COREFP6080
    80nb (3") PN6 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 100nb PN6 CORE Flange Pack

    100nb PN6 CORE Flange Pack

    COREFP6100
    100nb (4") PN6 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 125nb PN6 CORE Flange Pack

    125nb PN6 CORE Flange Pack

    COREFP6125
    125nb (5") PN6 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: Out of stock
    Picture of 150nb PN6 CORE Flange Pack

    150nb PN6 CORE Flange Pack

    COREFP6150
    150nb (6") PN6 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: Out of stock
    Picture of 200nb PN6 CORE Flange Pack

    200nb PN6 CORE Flange Pack

    COREFP6200
    200nb (8") PN6 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: Out of stock
    Picture of 50nb PN16 CORE Flange Pack

    50nb PN16 CORE Flange Pack

    COREFP16050
    50nb (2") PN16 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 65nb PN16 CORE Flange Pack

    65nb PN16 CORE Flange Pack

    COREFP16065
    65nb (2.1/2") PN16 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 80nb PN16 CORE Flange Pack

    80nb PN16 CORE Flange Pack

    COREFP16080
    80nb (3") PN16 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 100nb PN16 CORE Flange Pack

    100nb PN16 CORE Flange Pack

    COREFP16100
    100nb (4") PN16 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 125nb PN16 CORE Flange Pack

    125nb PN16 CORE Flange Pack

    COREFP16125
    125nb (5") PN16 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 150nb PN16 CORE Flange Pack

    150nb PN16 CORE Flange Pack

    COREFP16150
    150nb (6") PN16 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of 200nb PN16 CORE Flange Pack

    200nb PN16 CORE Flange Pack

    COREFP16200
    200nb (8") PN16 CORE Flange Pack contains all the components necessary for flange sealing. Each kit comprises of a WRAS Approved BS7531 Grade X Gasket (1.5mm thick) and a full set of bolts, nuts and washers, Bright Zinc Plated (BZP) as standard. Maximum Working tempreture 250°C
    Stock Availability: In stock
    Picture of Sheet Of 3mm W.F.Q. Rubber (1.4 x 1mtr)

    Sheet Of 3mm W.F.Q. Rubber (1.4 x 1mtr)

    WFQS
    1.4m x 1m Square Sheet of 3mm Thick White Food Quality Rubber
    Stock Availability: Out of stock
    Picture of 1.4mt x 1mt x 3mm Sheet of EPDM Rubber

    1.4mt x 1mt x 3mm Sheet of EPDM Rubber

    SR3
    1.4m x 1m Square Sheet of 3mm Thick EPDM Rubber
    Stock Availability: In stock
    Picture of 1.5mt x1.5mt Non Asbestos Sheet 1.6mm

    1.5mt x1.5mt Non Asbestos Sheet 1.6mm

    NAGS
    1.5m x 1.5m Square Non Asbestos Sheet 1.6mm Thick
    Stock Availability: In stock
    Picture of 3mm Sheet Of Non-Asb Jointing Gr-Y"

    3mm Sheet Of Non-Asb Jointing Gr-Y"

    NAGS3
    3mm Sheet of Non Asbestos Jointing Grade Y
    Stock Availability: In stock
    Picture of M6 x 25mm CORE BZP Bolt Only

    M6 x 25mm CORE BZP Bolt Only

    M625
    M6 x 25mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
    Stock Availability: In stock
    Picture of M6 x 30mm CORE BZP Bolt Only

    M6 x 30mm CORE BZP Bolt Only

    M630
    M6 x 30mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
    Stock Availability: In stock
    Picture of M10 x 75mm CORE BZP Bolt Only

    M10 x 75mm CORE BZP Bolt Only

    M1075
    M10 x 75mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
    Stock Availability: In stock
    Picture of M12 x 50mm CORE BZP Bolt Only

    M12 x 50mm CORE BZP Bolt Only

    M1250
    M12 x 50mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
    Stock Availability: In stock
    Picture of M12 x 55mm CORE BZP Bolt Only

    M12 x 55mm CORE BZP Bolt Only

    M1255
    M12 x 55mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
    Stock Availability: In stock
    Picture of M12 x 60mm CORE BZP Bolt Only

    M12 x 60mm CORE BZP Bolt Only

    M1260
    M12 x 60mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
    Stock Availability: In stock
    Picture of M12 x 65mm CORE BZP Bolt Only

    M12 x 65mm CORE BZP Bolt Only

    M1265
    M12 x 65mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
    Stock Availability: In stock