Tecnoseal General Motors Brass Plugs for Marine Engine Pencil Anodes BSPT

Tecnoseal General Motors Brass Plugs for Marine Engine Pencil Anodes – BSPT

Tecnoseal General Motors brass plugs are replacement mounting fittings designed for sacrificial pencil anodes used in marine engine heat exchangers and cooling-water systems. These brass components connect compatible zinc anode rods to the engine's cooling system fitting, allowing the plug to be replaced separately from the sacrificial anode.

The range includes four models with different external and internal thread sizes. The external connections are 3/8", 1/2" and 3/4" BSPT (Gas Conico), while the internal threads are 3/8", 7/16" and 5/8" UNC. The plug head dimensions range from 11 to 16 mm, and individual weights range from 0.03 to 0.08 kg.

The 02000TP, 02001TP and 02002TP versions feature the 1TP brass plug configuration. The 02003TP uses the 2TP configuration. Although the 02001TP and 02002TP have identical listed dimensions and connection sizes, they are retained as separate Tecnoseal part numbers.

All models are manufactured from brass and supplied individually without zinc anode rods. The 02000TP corresponds to original part number 8517479, with additional Tecnoseal cross-references available for identifying replacements.

Key Features

• Manufacturer: Tecnoseal
• Compatible Brand: General Motors
• Product Type: Brass mounting plug for pencil anodes
• Material: Brass
• Configuration: Brass Plug Only
• Available Models: 02000TP, 02001TP, 02002TP, 02003TP
• External Threads: 3/8", 1/2" and 3/4" BSPT
• Internal Threads: 3/8", 7/16" and 5/8" UNC
• Head Dimensions: 11, 13 and 16 mm
• Plug Types: 1TP and 2TP
• Weight Range: 0.03–0.08 kg

Available Models and Technical Specifications

Individual Model Specifications

Tecnoseal 02000TP – General Motors Brass Plug 1/2" BSPT with 7/16" UNC Connection

The Tecnoseal 02000TP is a brass mounting plug featuring a 1/2" BSPT (Gas Conico) tapered external thread and a 7/16" UNC internal connection for a compatible pencil anode. Its head dimension is 13 mm (0.51 in), and the plug weighs 0.05 kg (0.11 lbs). This version uses the 1TP configuration and corresponds to original part number 8517479. It is also referenced as Tecnoseal 08500TP.

• Product Code: 02000TP
• Original Part Number: 8517479
• Equivalent Reference: 08500TP
• Material: Brass
• External Thread (a): 1/2" BSPT (Gas Conico)
• Internal Thread (b): 7/16" UNC
• Head Dimension (c): 13 mm (0.51 in)
• Weight: 0.05 kg (0.11 lbs)
• Plug Type: 1TP
• EAN: 8033837066903
• Supply: Brass plug only

Tecnoseal 02001TP – General Motors Brass Plug 3/4" BSPT with 5/8" UNC Connection

The Tecnoseal 02001TP features a 3/4" BSPT tapered external thread combined with a 5/8" UNC internal connection for the sacrificial anode. The plug has a 16 mm (0.63 in) head dimension and weighs 0.08 kg (0.18 lbs). It uses the 1TP configuration and is intended for compatible General Motors marine engine cooling system installations.

• Product Code: 02001TP
• Material: Brass
• External Thread (a): 3/4" BSPT (Gas Conico)
• Internal Thread (b): 5/8" UNC
• Head Dimension (c): 16 mm (0.63 in)
• Weight: 0.08 kg (0.18 lbs)
• Plug Type: 1TP
• EAN: 8033837066934
• Supply: Brass plug only

Tecnoseal 02002TP – General Motors Brass Plug 3/4" BSPT with 5/8" UNC Connection

The Tecnoseal 02002TP is a brass pencil anode mounting plug with a 3/4" BSPT tapered external thread and a 5/8" UNC internal connection. It measures 16 mm (0.63 in) at the head and weighs 0.08 kg (0.18 lbs). Its listed dimensions match those of the 02001TP, while retaining a separate manufacturer product code for identification and ordering.

• Product Code: 02002TP
• Material: Brass
• External Thread (a): 3/4" BSPT (Gas Conico)
• Internal Thread (b): 5/8" UNC
• Head Dimension (c): 16 mm (0.63 in)
• Weight: 0.08 kg (0.18 lbs)
• Plug Type: 1TP
• EAN: 8033837067863
• Supply: Brass plug only

Tecnoseal 02003TP – General Motors Brass Plug 3/8" BSPT with 3/8" UNC Connection

The Tecnoseal 02003TP is a compact brass mounting plug featuring a 3/8" BSPT (Gas Conico) tapered external thread and a 3/8" UNC internal connection. Its head dimension is 11 mm (0.43 in), and the plug weighs 0.03 kg (0.07 lbs). This model uses the 2TP configuration and is also referenced as Tecnoseal 02027TP.

• Product Code: 02003TP
• Equivalent Reference: 02027TP
• Material: Brass
• External Thread (a): 3/8" BSPT (Gas Conico)
• Internal Thread (b): 3/8" UNC
• Head Dimension (c): 11 mm (0.43 in)
• Weight: 0.03 kg (0.07 lbs)
• Plug Type: 2TP
• EAN: 8033837067870
• Supply: Brass plug only

Original Part Numbers and Cross-References

Application and Compatibility

• General Motors marine engine cooling systems
• Compatible marine engine heat exchangers
• Replacement mounting fittings for sacrificial pencil anodes

Model Selection

Select the appropriate Tecnoseal General Motors brass plug by matching the external BSPT mounting thread, internal UNC connection, head dimension and original part reference.

The 02000TP uses a 1/2" BSPT external thread with a 7/16" UNC internal connection. The 02001TP and 02002TP share the same listed 3/4" BSPT and 5/8" UNC connections with 16 mm heads. The smaller 02003TP features a 3/8" BSPT external thread and a 3/8" UNC internal connection.

Verify the existing fitting and corresponding anode connection before ordering. The external BSPT thread and internal UNC thread serve different mounting functions and should not be confused.

Supply: All four versions are supplied as individual brass plugs without zinc sacrificial anodes.