Consent Preferences


The 8686 Top Mount Model 5-Bolt Head Medium Duty Spiral Gauge is designed for use in measuring liquid levels in gasoline, diesel fuel, bio-diesel, hydraulic and lubri- cating 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 & Gasket
• Solid Construction Head, No-Leakage Path to Dial

The 5-Bolt Head mounting of the 8686 Spiral Gauge allows a tight seal that restricts vapor loss. The 8686 5-Bolt Head Spiral Gauge is designed for top mounting and has an easy to read fractional dial. It is available in lengths from 6 to 20 inches.

Data Sheet

General Specifications*

Designed for top-mounting only.

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, off-road medium duty, and marine applications.

Tank Pressure
0 to 14.5 psig [0 – 1.0 Bar] maximum.

Tank Opening Details
Five 0.205” bolt holes on 2.12” bolt circle, Ø1.560 center hole.

*Note: For bolted gauge installation instructions see MS-501/502.

When Ordering Specify:

1. Gauge model number.
2. Tank depth.
3. Riser height, if any.

Materials of Construction*


Viton or Nitrile rubber.

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.


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


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