Description
Product Overview
This SK gauge pin set covers the 6.05–8.50mm range in 0.05mm increments, giving you 49 individual ground steel pins for checking bored holes, reamed features, slot widths, and go/no-go inspection work directly at the bench or on the CMM table. Each pin is held in a labelled, white plastic tray inside a hinged timber case — every size is immediately identifiable, which matters when you’re mid-job and need the right pin fast.
- 0.05mm step increments across the full range — Fine enough to catch an undersized reamed hole or confirm a H7 tolerance bore without reaching for a bore mic on every feature. When you’re chasing two-thou fits on bushings or dowel holes, having every 0.05mm covered means no interpolating between pins.
- Ground and lapped pin surfaces — Each pin is cylindrically ground to a high dimensional accuracy, ensuring the pin either passes or doesn’t — no ambiguity from a rough surface skewing the feel. Ground surfaces also resist wear far longer than turned pins, keeping the set accurate over years of bench use.
- Individual labelled storage in a rigid tray — The moulded plastic tray holds each pin upright in a dedicated labelled pocket. You pull the right size, use it, return it. No hunting through a loose pile, no mixing up a 7.45 and a 7.50 mid-inspection.
- Compatibility — Pins are used freehand or in a pin handle/holder (not included). No adaptors required. Compatible with any standard gauge pin handle sized for this diameter range. Suitable for use alongside ring gauges and CMM qualification routines.
- Ideal for — Checking reamed hole diameter before press-fitting dowel pins, verifying slot widths on milled parts, go/no-go inspection of drilled and bored features, setting up bore gauges against a known reference, and qualifying jig-plate hole positions in a toolroom environment.
Condition
Used (Like New / Lightly Used — Approximately Half Unsealed, Half Still Factory-Sealed in Original Plastic)
This set presents in excellent working condition. Approximately half the pins remain sealed in their original factory plastic wrap — they have never been used and retain factory surface finish and dimensional integrity. The remaining pins show light evidence of use but are in good condition: no visible scoring, pitting, or corrosion on the gauge surfaces, and the labelled tray is clean and intact with all pockets populated. The timber case and foam lid lining are sound, with only minor cosmetic wear consistent with bench storage. Mechanically and dimensionally, these pins are fit for precision inspection work. As with any used gauge pin set, verification against a calibrated ring gauge or CMM qualification is recommended before committing to tight-tolerance production inspection — this is standard practice regardless of condition and does not reflect any specific concern with this set. All 49 pins from 6.05mm through to 8.50mm are present and accounted for.
Included:
- 1 x SK Gauge Pin Set, 6.05–8.50mm, 0.05mm increments (49 pins)
- 1 x Original moulded plastic storage tray with individual labelled pockets
- 1 x Original hinged timber case with foam-lined lid
Not included: Gauge pin handle/holder, calibration certificate.
Brand Information
SK (Shin Nippon Sokki / SK Japan) is a well-regarded Japanese precision tool manufacturer with a long history supplying the professional toolroom and production inspection market. SK sits in the same tier as RSK and Niigata, and is frequently found alongside Mitutoyo and Tesa equipment in quality-conscious Japanese and Australian machine shops. Japanese-made metrology tools carry a well-earned reputation for consistent dimensional accuracy, quality steel, and reliable surface finish — SK gauge pins are no exception, and the brand is a trusted choice for toolmakers and quality engineers who need dependable go/no-go gauging without paying a premium for the Mitutoyo badge.
Specifications
| Feature | Specification |
|---|---|
| Brand | SK (Shin Nippon Sokki) |
| Type | Gauge Pin Set (Cylindrical Plug Gauges) |
| Measuring Range | 6.05mm – 8.50mm |
| Step / Increment | 0.05mm |
| Number of Pins | 49 |
| Graduation / Resolution | 0.05mm (per step increment) |
| Pin Construction | Cylindrically ground hardened steel |
| Storage | Moulded plastic tray with individual labelled pockets |
| Case | Hinged timber case with foam-lined lid |
| Country of Origin | Japan |
| Condition | Used (Like New) — approx. half pins still factory-sealed, remainder lightly used, all present |
| Included Items | 49 gauge pins, plastic storage tray, original timber case |
| Not Included | Gauge pin handle, calibration certificate |
Keywords
SK gauge pin set, SK Japan plug gauge, gauge pin set 6mm 8mm, cylindrical plug gauge set, go no-go gauge pins, toolroom inspection pins, pin gauge set Australia, bore inspection gauge, precision gauge pins metric, ground steel plug gauges, hole gauge set machinist, gauge pin set 6.05 8.50mm
