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Thread Gages & Thread Measurement

Thread Gages & Thread Measurement

Insize Thread Gages & Thread Measurement

Authorized Insize distributor  |  Ships direct from Insize  |  Quote reply same day

Insize thread gages for accepting or rejecting threaded parts: GO and NO GO ring gages for external threads and plug gages for internal threads in metric, American (UN), NPT, BSPT and G-series pipe threads, plus 3-wires, screw thread micrometer tips and thread measuring instruments.

Choosing between options

If you need to…ChooseExample
Check an external threadGO ring plus the matching NO GO ring4120-36
Check an internal threadThread plug gage4130-36
Measure pitch diameter with a micrometer3-wires sized to the pitch7382-24

Before you order

  • GO and NO GO rings are separate part numbers (NO GO ends in N); order both to check a thread fully.
  • For 60° threads the best wire diameter is 0.57735 × pitch; pick the 3-wire size for your pitch.
  • Ships direct from Insize. Most items are in stock; we confirm your ship date by email after you order.

← All Precision Measuring categories

Need help choosing or a volume price?
Send thread size, pitch, class and GO / NO GO and the quantity — we reply the same day. (210) 494-1997 · sales@ldewitt.net
Request a Quote
  • Insize 4646-511 precision measuring tool

    Insize 4646-511 – BSPT Taper Thread Plug Gage, 5-11 BSPT

    Insize

    $3,786.00
    Insize 4646-511 – BSPT Taper Thread
    4646-511
    SKU:
    4646-511
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    12.55 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4646-511
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640375033
    Package Weight:
    12.55 lb
    Package Length:
    9.45 in
    Package Width:
    8.66 in
    Package Height:
    8.66 in
    Feature 1:
    Standard BS 21-1985
    $3,786.00
  • Insize 4646-611 precision measuring tool

    Insize 4646-611 – BSPT Taper Thread Plug Gage, 6-11 BSPT

    Insize

    $3,807.00
    Insize 4646-611 – BSPT Taper Thread
    4646-611
    SKU:
    4646-611
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    15.00 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4646-611
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640375040
    Package Weight:
    15 lb
    Package Length:
    9.45 in
    Package Width:
    8.66 in
    Package Height:
    8.66 in
    Feature 1:
    Standard BS 21-1985
    $3,807.00
  • Insize 4812-12 precision measuring tool

    Insize 4812-12 – Thread Gage, Metric Trapezoidal (Tr 30°), 2-12MM

    Insize

    $39.80
    Insize 4812-12 – Thread Gage, Metri
    4812-12
    SKU:
    4812-12
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.09 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4812-12
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640319327
    Package Weight:
    0.09 lb
    Package Length:
    3.27 in
    Package Width:
    2.36 in
    Package Height:
    0.2 in
    Feature 1:
    To check and set screw cutting tools.
    Feature 2:
    Angle accuracy: ±10min.
    Feature 3:
    Thread Type Tr 30 Degree
    Feature 4:
    2-12mm, Pitch: 2,3,4,5,6,7,8,9,10,12,mm
    Feature 5:
    Made of medium carbon steel
    $39.80
  • Insize 4812-E precision measuring tool

    Insize 4812-E – Thread Gage, Acme 29°, 1-10TPI

    Insize

    $39.50
    Insize 4812-E – Thread Gage, Acme 2
    4812-E
    SKU:
    4812-E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.12 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4812-E
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640319334
    Package Weight:
    0.12 lb
    Package Length:
    4.33 in
    Package Width:
    3.86 in
    Package Height:
    0.12 in
    Feature 1:
    To check and set screw cutting tools.
    Feature 2:
    Angle accuracy: ±10min.pe
    Feature 3:
    Acme 29 Degree
    Feature 4:
    1 - 10TPI, Pitch: 1, 1-1/3, 1-1/2, 1-3/4,2,2-1/2,3,4,5,6,7,8,9,10 TPI
    Feature 5:
    Made of medium carbon steel
    $39.50
  • Insize 4820-122 precision measuring tool

    Insize 4820-122 – Pitch Gage, Metric, 0.4-7.0MM

    Insize

    $17.30
    Insize 4820-122 – Pitch Gage, Metri
    4820-122
    SKU:
    4820-122
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.10 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4820-122
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640319204
    Package Weight:
    0.1 lb
    Package Length:
    4.69 in
    Package Width:
    1.18 in
    Package Height:
    0.67 in
    Feature 1:
    Check the pitch of screw thread.
    Feature 2:
    Accuracy: ±.0028'.
    Feature 3:
    Quantity of leaves: 22
    Feature 4:
    Made of medium carbon steel
    $17.30
  • Insize 4820-124 precision measuring tool

    Insize 4820-124 – Pitch Gage, Metric, 0.25-7.0MM

    Insize

    $17.16
    Insize 4820-124 – Pitch Gage, Metri
    4820-124
    SKU:
    4820-124
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.11 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4820-124
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640319211
    Package Weight:
    0.11 lb
    Package Length:
    4.69 in
    Package Width:
    1.18 in
    Package Height:
    0.67 in
    Feature 1:
    Check the pitch of screw thread.
    Feature 2:
    Accuracy: ±.0028'.
    Feature 3:
    Quantity of leaves: 24
    Feature 4:
    Made of medium carbon steel
    $17.16
  • Insize 4820-230 precision measuring tool

    Insize 4820-230 – Pitch Gage, Inch (TPI), 4-42TPI

    Insize

    $21.12
    Insize 4820-230 – Pitch Gage, Inch
    4820-230
    SKU:
    4820-230
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.12 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4820-230
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640319235
    Package Weight:
    0.12 lb
    Package Length:
    4.69 in
    Package Width:
    1.18 in
    Package Height:
    0.67 in
    Feature 1:
    Check the pitch of screw thread.
    Feature 2:
    Accuracy: ±.0028'.
    Feature 3:
    Quantity of leaves: 30
    Feature 4:
    Made of medium carbon steel
    $21.12
  • Insize 4820-328 precision measuring tool

    Insize 4820-328 – Pitch Gage, Inch (TPI), 4-62TPI

    Insize

    $19.88
    Insize 4820-328 – Pitch Gage, Inch
    4820-328
    SKU:
    4820-328
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.11 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4820-328
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640319259
    Package Weight:
    0.11 lb
    Package Length:
    4.69 in
    Package Width:
    1.18 in
    Package Height:
    0.67 in
    Feature 1:
    Check the pitch of screw thread.
    Feature 2:
    Accuracy: ±.0028'.
    Feature 3:
    Quantity of leaves: 28
    Feature 4:
    Made of medium carbon steel
    $19.88
  • Insize 4820-330 precision measuring tool

    Insize 4820-330 – Pitch Gage, Inch (TPI), 4-42TPI

    Insize

    $20.71
    Insize 4820-330 – Pitch Gage, Inch
    4820-330
    SKU:
    4820-330
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.11 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4820-330
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640319242
    Package Weight:
    0.11 lb
    Package Length:
    4.69 in
    Package Width:
    1.18 in
    Package Height:
    0.67 in
    Feature 1:
    Check the pitch of screw thread.
    Feature 2:
    Accuracy: ±.0028'.
    Feature 3:
    Quantity of leaves: 30
    Feature 4:
    Made of medium carbon steel
    $20.71
  • Insize 4824-12 precision measuring tool

    Insize 4824-12 – Pitch Gage, Metric, 2-20MM

    Insize

    $81.40
    Insize 4824-12 – Pitch Gage, Metric
    4824-12
    SKU:
    4824-12
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.40 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4824-12
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640319181
    Package Weight:
    0.4 lb
    Package Length:
    4.72 in
    Package Width:
    1.97 in
    Package Height:
    1.38 in
    Feature 1:
    Check the pitch of screw thread.
    Feature 2:
    Accuracy: ±.0028'.
    Feature 3:
    Quantity of leaves: 12
    Feature 4:
    Made of medium carbon steel
    $81.40
  • Insize 4824-16 precision measuring tool

    Insize 4824-16 – Pitch Gage, Inch (TPI), 1-12TPI

    Insize

    $90.80
    Insize 4824-16 – Pitch Gage, Inch (
    4824-16
    SKU:
    4824-16
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.47 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4824-16
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640319198
    Package Weight:
    0.47 lb
    Package Length:
    4.72 in
    Package Width:
    1.97 in
    Package Height:
    1.38 in
    Feature 1:
    Check the pitch of screw thread.
    Feature 2:
    Accuracy: ±.0028'.
    Feature 3:
    Quantity of leaves: 16
    Feature 4:
    Made of medium carbon steel
    $90.80
  • Insize 4825-351 precision measuring tool

    Insize 4825-351 – Pitch Gage, Inch (TPI), 4-84TPI

    Insize

    $179.00
    Insize 4825-351 – Pitch Gage, Inch
    4825-351
    SKU:
    4825-351
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.22 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4825-351
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    Package Weight:
    0.22 lb
    Package Length:
    5.12 in
    Package Width:
    1.77 in
    Package Height:
    0.79 in
    $179.00
  • Insize 4860-15 precision measuring tool

    Insize 4860-15 – Gear Tooth Pitch Gage, 14.5° Pressure Angle, Range 2-5, Pressure angle14.5°

    Insize

    $123.00
    Insize 4860-15 – Gear Tooth Pitch G
    4860-15
    SKU:
    4860-15
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.28 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4860-15
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640386763
    Package Weight:
    0.28 lb
    Package Length:
    4.33 in
    Package Width:
    3.82 in
    Package Height:
    0.08 in
    Feature 1:
    Check the diameterical pitch of gear tooth.
    Feature 2:
    Accuracy: ±.002'.
    Feature 3:
    Made of hardened stainless steel
    $123.00
  • Insize 4860-180 precision measuring tool

    Insize 4860-180 – Gear Tooth Pitch Gage, 14.5° Pressure Angle, Range 6-80, Pressure Angle 14.5°

    Insize

    $192.00
    Insize 4860-180 – Gear Tooth Pitch
    4860-180
    SKU:
    4860-180
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.19 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4860-180
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640386787
    Package Weight:
    0.19 lb
    Package Length:
    3.23 in
    Package Width:
    2.36 in
    Package Height:
    0.59 in
    Feature 1:
    Check the diameterical pitch of gear tooth.
    Feature 2:
    Accuracy: ±.002'.
    Feature 3:
    Made of hardened stainless steel
    $192.00
  • Insize 4860-25 precision measuring tool

    Insize 4860-25 – Gear Tooth Pitch Gage, 20° Pressure Angle, Range 2-5, Pressure Angle 20°

    Insize

    $123.00
    Insize 4860-25 – Gear Tooth Pitch G
    4860-25
    SKU:
    4860-25
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.28 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4860-25
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640386770
    Package Weight:
    0.28 lb
    Package Length:
    4.33 in
    Package Width:
    3.82 in
    Package Height:
    0.35 in
    Feature 1:
    Check the diameterical pitch of gear tooth.
    Feature 2:
    Accuracy: ±.002'.
    Feature 3:
    Made of hardened stainless steel
    $123.00
  • Insize 4860-280 precision measuring tool

    Insize 4860-280 – Gear Tooth Pitch Gage, 20° Pressure Angle, Range 6-80, Pressure Angle 20°

    Insize

    $192.00
    Insize 4860-280 – Gear Tooth Pitch
    4860-280
    SKU:
    4860-280
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.17 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4860-280
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640386794
    Package Weight:
    0.17 lb
    Package Length:
    3.23 in
    Package Width:
    2.36 in
    Package Height:
    0.59 in
    Feature 1:
    Check the diameterical pitch of gear tooth.
    Feature 2:
    Accuracy: ±.002'.
    Feature 3:
    Made of hardened stainless steel
    $192.00
  • Insize 6250-4 precision measuring tool

    Insize 6250-4 – Standard Block, Taper 1:4, 4 TPI

    Insize

    $1,320.00
    Insize 6250-4 – Standard Block, Tap
    6250-4
    SKU:
    6250-4
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.44 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    6250-4
    Product Family:
    Bore and Inside Measurement
    Supplier Category Code:
    A
    EAN:
    6928640384554
    Package Weight:
    0.44 lb
    Package Length:
    2.64 in
    Package Width:
    2.64 in
    Package Height:
    1.02 in
    Feature 1:
    Number of thread per inch 4
    Feature 2:
    Set zero of internal and external thread height measuring instruments (code 2232, 2233)
    $1,320.00
  • Insize 6250-5 precision measuring tool

    Insize 6250-5 – Standard Block, Taper 1:4, 5 TPI

    Insize

    $1,320.00
    Insize 6250-5 – Standard Block, Tap
    6250-5
    SKU:
    6250-5
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.44 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    6250-5
    Product Family:
    Bore and Inside Measurement
    Supplier Category Code:
    A
    EAN:
    6928640384561
    Package Weight:
    0.44 lb
    Package Length:
    2.64 in
    Package Width:
    2.64 in
    Package Height:
    1.02 in
    Feature 1:
    Number of thread per inch 5
    Feature 2:
    Set zero of internal and external thread height measuring instruments (code 2232, 2233)
    $1,320.00
  • Insize 6250-51 precision measuring tool

    Insize 6250-51 – Standard Block, Taper 1:16, 5 TPI

    Insize

    $1,320.00
    Insize 6250-51 – Standard Block, Ta
    6250-51
    SKU:
    6250-51
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.44 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    6250-51
    Product Family:
    Bore and Inside Measurement
    Supplier Category Code:
    A
    EAN:
    6928640384578
    Package Weight:
    0.44 lb
    Package Length:
    2.64 in
    Package Width:
    2.64 in
    Package Height:
    1.02 in
    Feature 1:
    Number of thread per inch 5
    Feature 2:
    Set zero of internal and external thread height measuring instruments (code 2232, 2233)
    $1,320.00
  • Insize 6250-8 precision measuring tool

    Insize 6250-8 – Standard Block, Taper 1:16, 8, 10 TPI

    Insize

    $1,320.00
    Insize 6250-8 – Standard Block, Tap
    6250-8
    SKU:
    6250-8
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.44 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    6250-8
    Product Family:
    Bore and Inside Measurement
    Supplier Category Code:
    A
    EAN:
    6928640384585
    Package Weight:
    0.44 lb
    Package Length:
    2.64 in
    Package Width:
    2.64 in
    Package Height:
    1.02 in
    Feature 1:
    Number of thread per inch 8, 10
    Feature 2:
    Set zero of internal and external thread height measuring instruments (code 2232, 2233)
    $1,320.00