1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) 1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) (pack of 1)

Accu Product Code (APC): JBO-PG-512625

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1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) 1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) (pack of 1)

Accu Product Code (APC): JBO-PG-512625

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Official Johs Boss Thread Gauges Product.

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Accu Product Code (APC): JBO-PG-512625
Thread Size: 1-8 BSW
Hand: Right Hand
Gauge Type: Go/No-Go
Brand/Series: JBO Johs Boss
Provided Calibration: Uncalibrated
Manufacturing Standard: BS919-2
Material: Steel
Material Family: Steel
Provided Certification: Certificate of Conformity
Suitable for UKAS Calibration: Yes - Enquire
System of Measurement: Imperial
Thread Pitch: 8 TPI
Tolerance Class: Medium Class
Weight per 100 Units: 27.3 kg

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1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) Description

The 1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) has the following features:

Brand/Series: JBO Johs Boss
Gauge Type: Go/No-Go
Hand: Right Hand
Manufacturing Standard: BS919-2
Steel
Steel Material Family
Provided Calibration: Uncalibrated
Provided Certification: Certificate of Conformity
Suitable for UKAS Calibration: Yes - Enquire
System of Measurement: Imperial
Thread Pitch: 8 TPI
Thread Size: 1-8 BSW
Tolerance Class: Medium Class

Discover more about the Imperial BSW Plug Thread Gauges range.

Imperial BSW (British Standard Whitworth) Plug Thread Gauges are precision tools designed to inspect and verify the accuracy of internal threads that conform to the BSW standard. BSW threads are characterised by their rounded crests and roots, with a thread angle of 55 degrees. These gauges ensure that the internal threads in components such as nuts and tapped holes meet exact tolerances, guaranteeing compatibility and secure connections in mechanical assemblies.

How Imperial BSW Plug Thread Gauges Work

Imperial BSW Plug Thread Gauges are used to check the quality of internal threads by inserting the gauge into the threaded hole. A "Go" gauge fits smoothly without excessive force, confirming that the internal thread meets the minimum size requirement. A "No-Go" gauge should not engage fully, ensuring the thread does not exceed the maximum allowable size. This process is essential for quality control in applications like vintage machinery restoration or legacy infrastructure maintenance, where BSW threads are often encountered. For example, these gauges are used in the refurbishment of classic British vehicles to ensure new or rethreaded components match original specifications.

The Size and Types of Imperial BSW Plug Thread Gauges Available

Imperial BSW Plug Thread Gauges are available in a variety of sizes that correspond to standard BSW thread specifications. These typically range from 1/8 inch to 2 inches in diameter, covering common thread pitches such as 20, 18 and 16 threads per inch, depending on the size. Both "Go" and "No-Go" gauges are required for comprehensive thread inspection, ensuring internal threads conform to both minimum and maximum tolerance requirements.

FAQs

Q: What is the purpose of BSW Plug Thread Gauges?

A: BSW Plug Thread Gauges verify the accuracy of internal threads, ensuring they conform to BSW standards for reliable and secure connections.

Q: Why are BSW threads still in use?

A: BSW threads are common in legacy equipment, classic vehicles and certain industrial applications, making these gauges essential for maintenance and restoration projects.

Q: Can these gauges be used for older components?

A: Yes, BSW Plug Thread Gauges can verify the dimensions of internal threads in both new and existing components to ensure they meet BSW specifications.

Shipping Information

Shipping Destinations:

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Weight (100 items):

27.3kg

Component History

Product First Available:

Friday, March 31, 2017

Stock Last Updated:

10:54 AMThursday, June 4, 2026

Specification Last Updated:

Thursday, June 4, 2026

Barcodes

APC (Accu Product Code):

JBO-PG-512625

EAN13 (International Article No.):

5057196770403

ASIN (Amazon Stock Identification No.):

ASIN not defined.

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1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) 1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) (pack of 1)

1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) 1-8 BSW [Medium Class] - Go/No-Go Plug Thread Gauge (JBO Johs Boss) (pack of 1)

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