4.5-3.5 TPI Thread Insert 55° Whitworth Style - Metav IndustryLine

Take advantage of the combination of precise Whitworth profile, workshop compatibility and compact handling to streamline thread verification tasks; order the Thread inserts M309.098.9 directly via Metav Werkzeuge or ask our consultants if needed.

Thread inserts M309.098.9 — Thread gauge inserts, 4.5–3.5 TPI, 55° Whitworth (Metav IndustryLine)

A set of Thread inserts M309.098.9 engineered for verification of Whitworth-form 55° threads in thread-gauging and measurement applications

• Precision 55° Whitworth profile
• Compatible with 4.5–3.5 TPI gauges
• Compact accessory for metrology rigs

Accurate Whitworth profile for dependable thread verification

The core benefit of these inserts is the 55° Whitworth profile, manufactured to match the historical Whitworth form used across legacy and specialist components. The geometry ensures a faithful mechanical reference when comparing threads against gauge spindles or working standards, reducing ambiguity during acceptance checks. Designed for gauge use in inspection benches, the inserts help convert a visual or tactile check into a repeatable measurement step. The specification 4.5–3.5 TPI is stated in threads per inch (TPI), a standard imperial descriptor; this range covers coarse Whitworth pitches commonly found in heavy fastenings and historical components, delivering clear identification during routine verification.

Built for efficient workshop integration and faster inspections

These inserts are an accessory tailored to fit established thread-measuring instruments and gauge adaptors, enabling quicker changeover and less downtime. The compact form and low mass facilitate handling in tight inspection setups and on small benches; the nominal weight of 0.1 kg keeps adapters balanced while in use. As an accessory for metrology workflows, the inserts support efficient inspection loops: align, engage, and verify. This translates into measurable time savings on repetitive checks and reduces cumulative measurement uncertainty caused by frequent component swaps.

Compatibility and traceability to support quality control processes

Supplied under the Metav IndustryLine designation, the inserts integrate into documented inspection routines and provide an identifiable article for audit trails. The clear marking with SKU M309.098.9 and GTIN ensures traceability in inventory and quality records, which simplifies procurement and batch control. For quality managers, the availability of a defined accessory that matches the Whitworth 55° form means fewer bespoke adjustments and a predictable verification outcome when used with thread gauges and measuring spindles commonly found in maintenance and restoration shops.

Practical advantages for maintenance, restoration and specialised manufacturing

In environments where Whitworth threads remain in service—such as vintage machine restoration, railway engineering or specialist plant maintenance—these inserts provide a pragmatic means to confirm thread form quickly without expensive bespoke fixtures. The accessory character makes it a cost-effective supplement to a metrology set-up: instead of reworking or trial-fitting components, the inserts enable a controlled check that supports decision-making — repair, refurbish or replace. Combined with Metav’s logistics and stock range, the parts are straightforward to source and integrate into a parts-management system.

Contact Metav Werkzeuge for specification advice and to secure the M309.098.9 thread inserts for Whitworth 55° applications; assistance is available from Emmerich for product selection and delivery coordination

Technical Data

• Article number: M309.098.9
• GTIN: 4054469118406
• Tariff number: 90173000

Facts

• Threads per inch: 4.5–3.5 TPI
• Thread angle: 55°
• Weight: 0.1 kg
• eCl@ss: 21170324

Special features

• Whitworth 55° profile
• Accessory for thread gauges / measuring instruments
• Category: Measuring devices — accessory

FAQ

What thread form do these inserts represent?
The inserts represent the Whitworth 55° thread form and are manufactured to correspond with the historical Whitworth profile for reliable verification.

Which TPI range is covered by the inserts?
The inserts cover a 4.5–3.5 TPI range, stated in threads per inch for compatibility with imperial-thread gauges.

Can these inserts be used with standard thread measuring spindles?
Yes, the accessory is designed for use with thread gauges and measuring instruments that accept thread inserts for verification tasks.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com