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LDI INDUSTRIES Vented Oil Gauges: 6.23 in Body Ht, 4 1/4 in Sight Ht, 3/8" NPTF Female - Vented Oil Level Gauges
LDI INDUSTRIESVented Oil Level Gauges

LDI INDUSTRIES Vented Oil Gauges: 6.23 in Body Ht, 4 1/4 in Sight Ht, 3/8" NPTF Female

The LDI INDUSTRIES Vented Oil Gauge (SKU 1U595, MPN G421-3) is a G400 Series-compatible oil level gauge with a 6.23 in body height and 4 1/4 in sight height. It features a 3/8" NPTF female connection, Buna N seal…

SKU 3G-OTH-592821

Brand
LDI INDUSTRIES
Item
Vented Oil Gauges: 6.23 in Body Ht, 4 1/4 in Sight Ht, 3/8" NPTF Female
Category
Vented Oil Level Gauges
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Technical Specifications

LDI INDUSTRIES
Manufacturer Part Number
G421-3
Sight Ht
4 1/4 in
NPTF Female
3/8"
Seal Material
Buna N
Max. Temp Rating
250°F
Includes Thermometer
No Thermometer Included
Compatible with Series
G400 Series
View Full Spec Sheet

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LDI INDUSTRIES Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The LDI INDUSTRIES Vented Oil Gauge (SKU 1U595, MPN G421-3) is a G400 Series-compatible oil level gauge with a 6.23 in body height and 4 1/4 in sight height. It features a 3/8" NPTF female connection, Buna N seal material, and a maximum temperature rating of 250°F, with no thermometer included.

Frequently Asked Questions

What is a vented oil gauge used for?

A vented oil gauge provides a clear visual indication of oil level in reservoirs, gearboxes, and hydraulic tanks. The vent allows pressure equalization, preventing seal damage. LDI INDUSTRIES G421-3 is a G400 Series gauge with a 6.23 in body height and 4 1/4 in sight height, suitable for industrial machinery monitoring.

What are the specifications of the LDI INDUSTRIES G421-3 vented oil gauge?

The LDI INDUSTRIES G421-3 vented oil gauge has a 6.23 in body height, 4 1/4 in sight height, 3/8" NPTF female connection, Buna N seal material, and a maximum temperature rating of 250°F. It is compatible with the G400 Series and does not include a thermometer.

Where to buy LDI INDUSTRIES G421-3 vented oil gauge worldwide?

3G Electric supplies the LDI INDUSTRIES G421-3 vented oil gauge worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this G400 Series-compatible gauge with a 3/8" NPTF female connection.

How to install a vented oil gauge like the LDI INDUSTRIES G421-3?

Install the LDI INDUSTRIES G421-3 vented oil gauge by applying thread sealant to the 3/8" NPTF female connection and tightening into a compatible port. Ensure the vent is unobstructed for pressure equalization. The Buna N seal handles oil temperatures up to 250°F. Verify sight height alignment for accurate level reading.

Used in

Common applications for LDI INDUSTRIES
Hydraulic power units — LDI Industries pump motor adapters (e.g., MPN 6028) connect electric motors to hydraulic pumps in industrial machinery.
Mobile equipment — LDI Industries SAE B 4-bolt adapters (e.g., MPN 1952) used in construction vehicle hydraulic systems.
Gas engine-driven pumps — LDI Industries gas engine/pump adapter (MPN 6019) interfaces PEM-G flange engines with SAE A pumps.
Hydraulic tank fabrication — LDI Industries steel return flanges (e.g., MPN 5111) welded onto reservoirs for fluid return ports.
Maintenance replacement — LDI Industries pump motor adapters (e.g., MPN 1960) replace worn or incompatible adapters in existing hydraulic systems.
Industrial automation — LDI Industries adapters (e.g., MPN 1950) used in stationary hydraulic presses and material handling equipment.

LDI INDUSTRIES Products

3G Electric supplies LDI INDUSTRIES vented oil level gauges. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Vented Oil Gauges: 6.23 in Body Ht, 4 1/4 in Sight Ht, 1/2" NPTF Female, 250°F Max. Temp Rating (MPN G421-4). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G400 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
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Vented Oil Gauges: 6.23 in Body Ht, 4 1/4 in Sight Ht, 1/2" NPTF Female, 250°F Max. Temp Rating (MPN G421-4). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G400 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
Vented Oil Gauges: 5.17 in Body Ht, 3 1/4 in Sight Ht, 1/4" NPTF Female, 250°F Max. Temp Rating (MPN G406-2). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G400 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
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Vented Oil Gauges: 5.17 in Body Ht, 3 1/4 in Sight Ht, 1/4" NPTF Female, 250°F Max. Temp Rating (MPN G406-2). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G400 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
Vented Oil Gauges: 4.48 in Body Ht, 2 3/4 in Sight Ht, 1/4" NPTF Male, 250°F Max. Temp Rating (MPN G305-2). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G300 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
LDI INDUSTRIES
Vented Oil Gauges: 4.48 in Body Ht, 2 3/4 in Sight Ht, 1/4" NPTF Male, 250°F Max. Temp Rating (MPN G305-2). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G300 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
Vented Oil Gauges: 6.19 in Body Ht, 4 1/4 in Sight Ht, 1/2" NPTF Male, 250°F Max. Temp Rating (MPN G321-4). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G320 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
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Vented Oil Gauges: 6.19 in Body Ht, 4 1/4 in Sight Ht, 1/2" NPTF Male, 250°F Max. Temp Rating (MPN G321-4). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G320 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
Vented Oil Gauges: 5.98 in Body Ht, 4 1/4 in Sight Ht, 1/4" NPTF Male, 250°F Max. Temp Rating (MPN G307-2). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G300 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
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Vented Oil Gauges: 4.17 in Body Ht, 2 3/4 in Sight Ht, 1/4" NPTF Male, 250°F Max. Temp Rating (MPN G655-2). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G650 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
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Vented Oil Gauges: 4.17 in Body Ht, 2 3/4 in Sight Ht, 1/4" NPTF Male, 250°F Max. Temp Rating (MPN G655-2). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G650 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
Vented Oil Gauges: 5.92 in Body Ht, 4 1/4 in Sight Ht, 1/2" NPTF Male, 250°F Max. Temp Rating (MPN G261-4). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G260 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
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Vented Oil Gauges: 5.92 in Body Ht, 4 1/4 in Sight Ht, 1/2" NPTF Male, 250°F Max. Temp Rating (MPN G261-4). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G260 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
Vented Oil Gauges: 5.67 in Body Ht, 4 1/4 in Sight Ht, 1/4" NPTF Male, 250°F Max. Temp Rating (MPN G657-2). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G650 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.
LDI INDUSTRIES
Vented Oil Gauges: 5.67 in Body Ht, 4 1/4 in Sight Ht, 1/4" NPTF Male, 250°F Max. Temp Rating (MPN G657-2). Key specifications — Brand: LDI INDUSTRIES; Compatible with Series: G650 Series; Includes Thermometer: No Thermometer Included; Seal Material: Buna N.