1/4" 28 TPI UNF Thread Go/No-Go Ring Gauge Right-Hand Hardened Gauge Steel ANSI/ASME B1.1 2A - Metav IndustryLine

The hardened gauge steel construction and strict ANSI/ASME B1.1 conformity ensure reliable acceptance testing of 1/4‑28 UNF threads; combined with the 2A tolerance class this ring supports consistent quality control and fewer production rejects. Order the thread gauge ring directly via Metav Werkzeuge or ask our consultants if needed.

Thread gauge ring UNF NOGO — 1/4‑28 tpi, ANSI/ASME B1.1 / 2A (Metav IndustryLine)

The Thread gauge ring UNF NOGO, 1/4 x 28 ANSI/ASME B1.1 / 2A is a go/no‑go ring gauge designed for fast verification of 1/4‑28 UNF right‑hand external threads in production and inspection environments.

• NOGO ring for 1/4‑28 UNF
• Hardened gauge steel construction
• Conforms to ANSI/ASME B1.1 standard
• Tolerance class 2A for external threads

Fast, unambiguous pass/fail checks for production lines

This NOGO ring performs immediate go/no‑go verification so non‑conforming parts are recognised at the first control point. By using a dedicated 1/4‑28 UNF NOGO ring, cycle times are shortened and manual gauging ambiguity is removed; the clear mechanical decision reduces rework and improves throughput on the shop floor. The result is a measurable improvement in process reliability during threaded part production.

Built for repeatable precision and long service life

Manufactured from hardened gauge steel, the ring offers strong wear resistance and dimensional stability under regular use. The 2A tolerance class defines the acceptance limit for external threads and, together with the robust material, supports repeatable inspection over many batches. For quality teams this means fewer replacements, predictable maintenance intervals and consistent inspection results across shifts.

Conformity to standards for traceable inspection

Compliance with ANSI/ASME B1.1/B1.2 ensures compatibility with established UNF thread definitions and facilitates communication across procurement and inspection departments. The ring's right‑hand thread form and 28 tpi pitch match industry specifications, enabling its integration into documented quality plans and acceptance procedures. Using standardised gauges aids certification processes and supports contractual quality requirements.

Practical use cases and workshop advantages

Designed as a dedicated external thread gauge, this ring is suitable for inline sample checks, incoming goods inspection and final part acceptance. The compact ring format simplifies handling on the control bench and reduces the risk of misalignment during checks. Calibration intervals can be scheduled according to in‑house quality policy to maintain measurement confidence and to document conformity during audits.

Contact Metav Werkzeuge to arrange supply, request calibration details and secure the M315.980.F thread ring for your inspection workflow

Technical Data

• Article number: M315.980.F
• GTIN: 4054469180816
• Label: Gewinde‑Lehrring UNF NOGO , 1/4 x 28 ANSI B1.1 / 2A
• Material: Lehrenstahl, gehärtet
• Standard: ANSI/ASME B1.1/B1.2

Facts

• Size: 1/4"
• Pitch: 28 tpi
• Tolerance class: 2A
• Weight: 0.1 kg

Special features

• Type: Thread ring gauge (NOGO)
• Thread direction: Right‑hand thread
• Application: External thread inspection
• Usage: Go/No‑Go acceptance testing

FAQ

What does NOGO mean for this ring gauge?
The NOGO designation indicates the ring is intended as the limit gauge that must not pass a correctly made part; the Thread gauge ring UNF NOGO, 1/4 x 28 verifies that external threads do not exceed the maximum material condition.

Is the ring suitable for production control of UNF threads?
Yes, the ring is specified for 1/4‑28 UNF external threads and, by conforming to ANSI/ASME B1.1, is suitable for routine production and incoming inspection tasks.

Which material is used for the gauge and why?
The gauge is made from hardened gauge steel, chosen for wear resistance and dimensional stability to ensure sustained accuracy during repeated use.

What does tolerance class 2A signify for inspectors?
Tolerance class 2A defines the acceptance limits for external threads; inspectors use this class to judge whether a manufactured thread meets standard external thread fit requirements.

Can this ring be used for left‑hand threads?
No, this specific ring is manufactured with a right‑hand thread and is intended for right‑hand 1/4‑28 UNF checks only.

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