Used for quick and accurate setting of dial bore gages, Holtest, and inside micrometers.
Steel:
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Ceramic:
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Specifications:
| Metric | ||||
| Order No | Size | Accuracy | Outside DIA | Ring Width |
| 177-125 | 8mm | ±1.5µm | 32mm | 10mm |
| 177-126 | 10mm | ±1.5µm | 32mm | 10mm |
| 177-132 | 14mm | ±1.5µm | 38mm | 10mm |
| 177-133 | 17mm | ±1.5µm | 45mm | 10mm |
| 177-139 | 25mm | ±1.5µm | 53mm | 15mm |
| 177-140 | 35mm | ±1.5µm | 71mm | 15mm |
| 177-146 | 50mm | ±1.5µm | 85mm | 20mm |
| 177-147 | 70mm | ±1.5µm | 112mm | 20mm |
| 177-148 | 90mm | ±1.5µm | 140mm | 25mm |
| 177-177 | 16mm | ±1.5µm | 45mm | 10mm |
| 177-178 | 45mm | ±1.5µm | 85mm | 15mm |
| 177-204 | 4mm | ±1.5µm | 25mm | 7mm |
| 177-205 | 5mm | ±1.5µm | 25mm | 7mm |
| 177-208 | 2.5mm | ±1.5µm | 25mm | 7mm |
| 177-220 | 1mm | ±1.5µm | 20mm | 4mm |
| 177-222 | 1.1mm | ±1.5µm | 20mm | 4mm |
| 177-225 | 1.2mm | ±1.5µm | 20mm | 4mm |
| 177-227 | 1.3mm | ±1.5µm | 20mm | 4mm |
| 177-230 | 1.4mm | ±1.5µm | 20mm | 4mm |
| 177-236 | 1.75mm | ±1.5µm | 25mm | 5mm |
| 177-239 | 2mm | ±1.5µm | 25mm | 5mm |
| 177-242 | 2.25mm | ±1.5µm | 25mm | 5mm |
| 177-246 | 2.75mm | ±1.5µm | 25mm | 7mm |
| 177-248 | 3mm | ±1.5µm | 25mm | 7mm |
| 177-250 | 3.25mm | ±1.5µm | 25mm | 7mm |
| 177-252 | 3.5mm | ±1.5µm | 25mm | 7mm |
| 177-255 | 3.75mm | ±1.5µm | 25mm | 7mm |
| 177-257 | 4.5mm | ±1.5µm | 25mm | 7mm |
| 177-263 | 5.5mm | ±1.5µm | 25mm | 7mm |
| 177-267 | 6mm | ±1.5µm | 25mm | 7mm |
| 177-271 | 6.5mm | ±1.5µm | 25mm | 7mm |
| 177-275 | 7mm | ±1.5µm | 25mm | 7mm |
| 177-284 | 12mm | ±1.5µm | 32mm | 10mm |
| 177-286 | 20mm | ±1.5µm | 45mm | 10mm |
| 177-288 | 30mm | ±1.5µm | 71mm | 15mm |
| 177-290 | 40mm | ±1.5µm | 71mm | 15mm |
| 177-292 | 60mm | ±1.5µm | 112mm | 20mm |
| 177-294 | 80mm | ±1.5µm | 125mm | 25mm |
| 177-296 | 100mm | ±1.5µm | 160mm | 25mm |
| 177-298 | 125mm | ±2.5µm | 210mm | 38.1mm |
| 177-300 | 150mm | ±2.5µm | 235mm | 38.1mm |
| 177-302 | 175mm | ±2.5µm | 260mm | 38.1mm |
| 177-304 | 200mm | ±2.5µm | 311mm | 38.1mm |
| 177-306 | 225mm | ±2.5µm | 337mm | 38.1mm |
| 177-308 | 250mm | ±2.5µm | 362mm | 38.1mm |
| 177-310 | 275mm | ±2.5µm | 413mm | 38.1mm |
| 177-312 | 300mm | ±2.5µm | 438mm | 38.1mm |
| 177-314 | 62mm | ±1.5µm | 112mm | 20mm |
| 177-316 | 75mm | ±1.5µm | 125mm | 25mm |
| 177-318 | 87mm | ±1.5µm | 140mm | 25mm |
| Inch | ||||
| Order No | Size | Accuracy | Outside DIA | Ring Width |
| 177-179 | .35in | ±.00006in | 1.26in | .39in |
| 177-180 | .50in | ±.00006in | 1.26in | .39in |
| 177-181 | .60in | ±.00006in | 1.5in | .39in |
| 177-182 | .65in | ±.00006in | 1.77in | .39in |
| 177-183 | .70in | ±.00006in | 1.77in | .39in |
| 177-184 | 1in | ±.00006in | 2.09in | .59in |
| 177-185 | 1.4in | ±.00006in | 2.8in | .59in |
| 177-186 | 1.8in | ±.00006in | 3.35in | .59in |
| 177-187 | 2in | ±.00006in | 3.35in | .79in |
| 177-188 | 2.8in | ±.00006in | 4.41in | .79in |
| 177-189 | 3.6in | ±.00006in | 5.51in | .98in |
| 177-206 | .16in | ±.00006in | .98in | .28in |
| 177-207 | .24in | ±.00006in | .98in | .28in |
| 177-209 | .1in | ±.00006in | .98in | .28in |
| 177-281 | .275in | ±.00006in | .98in | .28in |
| 177-283 | .425in | ±.00006in | 1.26in | .39in |
| 177-287 | .80in | ±.00006in | 1.77in | .39in |
| 177-289 | 1.2in | ±.00006in | 2.8in | .59in |
| 177-291 | 1.6in | ±.00006in | 2.8in | .59in |
| 177-293 | 2.4in | ±.00006in | 4.41in | .79in |
| 177-295 | 3.2in | ±.00006in | 4.92in | .98in |
| 177-297 | 4in | ±.00006in | 6.3in | .98in |
| 177-299 | 5in | ±.00010in | 8.27in | 1.5in |
| 177-301 | 6in | ±.00010in | 9.25in | 1.5in |
| 177-303 | 7in | ±.00010in | 10.24in | 1.5in |
| 177-305 | 8in | ±.00010in | 12.24in | 1.5in |
| 177-307 | 9in | ±.00010in | 13.27in | 1.5in |
| 177-309 | 10in | ±.00010in | 14.25in | 1.5in |
| 177-311 | 11in | ±.00010in | 16.26in | 1.5in |
| 177-313 | 12in | ±.00010in | 17.24in | 1.5in |
| 177-315 | 2.5in | ±.00006in | 4.41in | .79in |
| 177-317 | 3in | ±.00006in | 4.92in | .98in |
| 177-319 | 3.5in | ±.00006in | 5.51in | .98in |
