Gauge Crystals

GAUGE CRYSTALS

G-S stocks flat and domed gauge crystals in many diameters, which are used as replacement crystals when an instrument is being repaired and/or calibrated.

Click here to view a convenient list of gauge and instrument brands and models, and their corresponding G-S crystals.

If your gauge or instrument does not appear on this list, please call or email us with the diameter required (preferably in millimeters). We can supply a flat window (W style) or a domed (PKH style) window to fit your instrument. The chart below lists standard W style windows that are stocked in our warehouse.

STOCK “W” MICON ROUND, FLAT WINDOWS PDF

“W” style crystals not in stock may be ordered in industrial quantities. Minimum quantities and setup charges may apply. Please contact us for more information.

Crystals for Gauge & Instrument Repair

G-S manufactures and distributes replacement crystals for popular dial gauge and instrument brands.

A sampling of these popular brands are:

Ames
Interrapid
Brown & Sharpe
Mitutoyo

Chicago Dial
Standard
Federal
Starrett

STOCK WINDOWS AND CRYSTALS FOR GAUGE AND INSTRUMENT REPAIR

G-S Item ID Description
PK Domed—Round 8.4mm to G-S size PK 37
(8.4mm to 36.2mm) Available in 1/4 size to PK 30
PKH Domed—Round G-S size PKH 37-1/2 to 70
(36.5mm to 57.1mm) Available in half sizes
BS 579-2 Brown & Sharpe (35.4mm)
BS 7030-3 Brown & Sharpe (27.6mm)
BS 7031-3 Brown & Sharpe (37.2mm)
ST 5798 Use low-domed mineral glass LMG 35.8 or 35.9
ST 7112-Old ST 7112-Old style Starrett
2228-B ST 7112 -New Style – Use PHD 16-3/4
2475 Ames 100 (40.8mm)
2156 Ames 200—Old (55.0mm)
2174 Ames 300—Old (67.8mm)
2185 Ames 400 (88.9mm)
2640 INT 102 (36.0mm)

H-1 Hand Inserter Set

The H-1 Set is used for fitting crystals and windows for dial indicators, gauges, instruments and watches.
This set includes the G-S Hand Press, 10 blocks and 6 plugs for fitting crystals by compression, for crystals ranging from 8.4mm to 50.8mm (2″).
The blocks and plugs may also be purchased individually.
Extra large blocks and plugs may be purchased separately. Please contact us for more information.

G-S Blocks Description Inches Millimeters Use Plug Size
X007 11.5mm – 2-3/4 .45” – .57” 11.55mm – 14.4mm HP5038 – #5
X008 3 – 10 .58” – .75” 14.6mm – 19.0mm HPO5037 – #4
X009 11 – 16 .78” – .90” 1937mm – 22.9mm HP5033 – #0
X010 17 – 22 .93” – 1.05” 23.5mm – 26.7mm HP5036 – #3
X011 23 – 28 1.08” – 1.20” 27.3mm – 30.5mm HP5036 – #3
X012 29 – 34 1.23” – 1.35” 31.1mm – 34.3mm HP5035 – #2
X013 35 – 40 1.38” – 1.50” 24.9mm – 38.1mm HP5035 – #2
X014 41 – 46 1.53” – 1.65” 38.7mm – 41.9mm HP5034 – #1
X015 47 – 52 1.68” – 1.80” 42.6mm – 45.7mm HP5034 – #1
X016 53 – 58 1.83” – 1.95” 46.4mm – 49.5mm HP5034 – #1