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Press Fit Spiral Gauges


The 8681 Junior Top Mount Model “Press Fit” Spiral Gauge is designed for use in measuring liquid levels in gasoline, diesel fuel, bio-diesel, hydraulic and lubricating oils where space restrictions prevent the use of a swing-arm style mechanical gauge. It is ideal for medium duty construction & agriculture, lawn & garden, and recreational vehicle applications.

General Information & Features

• Field Replaceable Snap-On Fractional Dial
• Solid Construction Head, No-Leakage Path to Dial

The “Press Fit” mounting of the 8681 Spiral Gauge allows a 360 degree orientation of the dial for ease in fuel level monitoring. The “Press Fit” mounting contributes to the gauges adaptability for use in restricted areas.

The 8681 “Press Fit” Spiral Gauge is designed for top mounting utilizing a Nitrile rubber seal (included with the gauge), an easy to read fractional dial, and is available in lengths from 6 to 20 inches.


Data Sheet

MS-520 - Machining Standards

General Specifications*


Designed for "Press Fit" top-mounting only.
Recommended hole size: 1.486"±0.020" (37.75mm ± 0.50mm).
Tank thickness: 0.079" - 0.394" 2.0mm - 10.00mm).


Accuracy depends upon proper gauge sizing. Direct read dials +/-7%. Accuracy may be less depending upon tank shape. Accuracy may be less near full and empty. Accuracy may be less if tank is not level. This gauge is not to be used for filling. All accuracy estimates are expressed as a percent of full scale.


Standard operating range is -40°F to 158°F, -40°C to 70°C.

Shock & Vibration

Suitable for mobile, and off-road light duty applications.

Tank Pressure

0 to 6 PSIG [0 to 0.4 Bar] maximum.

Tank Opening Details

See MS-520.

When Ordering Specify:

1. Gauge model number.

2. Tank height.

3. Riser height, if any.

4. Optional Viton Seal.

Materials of Construction*




Nitrile Rubber (Optional Viton Seal).

Guide Rod

Stainless steel.


Stainless steel.

Tie Plate

Stainless steel.

Guide & Bearing Pin

Stainless steel.


Nitrile ebonite.

Drive Magnet

Nylon 12 composite.

Standard Dial

Copolymer, hermetically sealed, gasoline resistant.

Magnet Holder & Centershaft Holder


*Materials and specifications are subject to change without notice. Pressure ratings subject to change due to temperature and other environmental considerations.