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Thread ring gauge M5x0.5 6g GO NO-GO
213404
€32.37 tax inc.
Net price: €26.32
Description
ThreadM5 × 0.5
Tolerance class6g
SetGO + NO-GO
StandardISO 1502
Technical specifications of the M5 × 0.5 thread ring gauge
Gauge set specifications according to ISO 1502
| TECHNICAL DATA | |
|---|---|
| Gauge type | GO + NO-GO thread ring gauge set |
| Thread | M5 × 0.5 mm |
| Tolerance class | 6g |
| Nominal diameter (d) | Ø5.000 mm |
| Pitch diameter (d2) | 4.675 mm |
| d2 range for 6g | 4.580 – 4.655 mm |
| Minor diameter (d3) | 4.387 mm |
| Thread pitch (P) | 0.5 mm |
| Thread angle | 60° |
| Material | Tool steel, hardened |
| Hardness | 58–62 HRC |
| Gauge standard | ISO 1502 / DIN 2285 + DIN 2299 |
| Thread standard | ISO 965-1 / DIN 13-1 |
| Reference temperature | 20 °C |
T
GO ring gauge — screwed on by hand along the full bolt thread.
Z
NO-GO ring gauge with a groove in the knurled surface — stops after no more than 2 turns.
The M5x0.5-6g engraving on the face of both rings indicates the size and tolerance class of the bolt being inspected.
Limit gauging principle: GO + NO-GO
Gauge for M5 external threads according to ISO 1502
1
The GO ring screws by hand, without force, over the full thread of the M5x0.5 bolt.
2
The NO-GO ring gauge stops after no more than 2 turns — turns are counted when unscrewing.
3
The GO ring gauge passed, NO-GO stopped — the bolt meets class 6g.
The ring gauge set M5 × 0.5 6g checks an external thread — on a bolt, stud or turned pin. The ring gauge GO must screw on by hand along the full thread length, while the ring gauge NO-GO may advance no more than 2 threads, counted when unscrewing. Only both results together confirm that the thread is neither oversized nor undersized.
The M5 × 0.5 fine thread is used where precise adjustment or a thin component wall matters: in adjustment mechanisms, optics, sensors, and housings with little material to spare. Check the pitch: the coarse M5 thread has a pitch of 0.8 mm; this gauge applies to the version with a fine pitch of 0.5 mm and does not fit the coarse M5 thread. For reference: the thread minor diameter M5 × 0.5 is 4.387 mm — this cross section determines the bolt's strength, while the gauge checks the pitch diameter.
The gauge GO has a full thread profile and represents the upper tolerance limit (d2 max = 4.655 mm) — it must screw on by hand over the full length, without a wrench. The gauge NO-GO has a truncated profile and checks the lower limit (d2 min = 4.580 mm); according to ISO 1502 §7 must not engage more than 2 threads.
Thread inspection M5 × 0.5 — class 6g
1 GO gauge
screws on the full length: YES
2 NO-GO gauge
advances max. 2 turns: YES
✓ Conforming thread
class 6g confirmed
Inspection standard: ISO 1502 · Tolerances: ISO 965-1 · Dimensions: ISO 724 / DIN 13-1
✓ Thread acceptable — GO screws onto the full thread, NO-GO stops.
✗ Thread oversized — GO does not screw onto the bolt.
✗ Thread undersized — NO-GO screws on more than 2 turns.
Tolerance classes for an M5 × 0.5 external thread
Comparison according to ISO 965-1
Comparison of classes 4g and 6g
Basic pitch diameter d2 for the thread M5 × 0.5 is 4.675 mm. The deviations in the table are measured downward from this value.
| Class | d2 nominal [mm] | d2 permissible [mm] | Tolerance zone | Application | Status |
|---|---|---|---|---|---|
| 4g | 4.675 mm | 4.607 – 4.655 mm | 0.048 mm | Precision fit | |
| 6g | 4.675 mm | 4.580 – 4.655 mm | 0.075 mm | Standard fit — bolts, fasteners | THIS PRODUCT |
The full range of class 6g is 0.075 mm. Class 6g is the standard for general-purpose bolts and mates with 6H nuts; 4g reduces clearance in guiding joints, while 6e and 8g leave an allowance for electroplating. The table gives pitch diameter d2, not the thread major diameter.
Proper use and calibration
Maintaining gauge accuracy
Usage rules according to ISO 1502
Before measurement, remove chips and oil from the thread. The gauge is screwed on by hand only — a wrench distorts the result and accelerates wear. Reference temperature: 20 °C. Store the set protected with rust-preventive oil. The user determines the calibration interval — ISO 1502 (clause 7.2.1) requires periodic measurement but does not specify an interval.
INCLUDED:
| ✓ | 1 × GO thread ring gauge — GO, full thread profile |
| ✓ | 1 × NO-GO thread ring gauge — NO-GO, truncated profile |
| ✓ | Tool steel hardened to 58–62 HRC |
| ✓ | Thread and class marking on the circumference of the ring |
Frequently asked questions
The principle of limit gauging requires checking the maximum and minimum material limits. The GO gauge confirms that the thread is not oversized (it screws on over the full length), and the NO-GO gauge confirms that it is not undersized (it does not engage more than 2 turns according to ISO 1502). Using one gauge leaves the other limit unchecked.
Coarse M5 has a pitch of 0.8 mm and a pitch diameter of 4.480 mm, while fine M5 × 0.5 — a pitch of 0.5 mm and a pitch diameter of 4.675 mm. The threads are more closely spaced and the core is thicker, so a fine thread withstands loads better in a thin wall and allows more precise adjustment. The gauges for the two versions are not interchangeable.
The thread is nonconforming, if the GO gauge does not screw on over the full length (d2 above 4.655 mm) or the NO-GO gauge engages more than 2 turns (d2 below 4.580 mm). In both cases, the part must be rejected or reworked. Standards: ISO 965-1 (tolerances), ISO 1502 (procedure).
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| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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