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E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/16"-24 Int Thrd Sz, 1/2"-13 Ext Thrd Sz - Heavy Wall Self-Locking Inserts
E-Z LOKHeavy Wall Self-Locking Inserts

E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/16"-24 Int Thrd Sz, 1/2"-13 Ext Thrd Sz

The E-Z LOK Self Locking Thread Insert is a heavy-wall, inch-system insert with a 5/16"-24 UNF internal thread and a 1/2"-13 UNC external thread, supplied in a 5-pack (SKU 4ZB74, MPN 303-524-PK5). It features a 2A…

SKU 3G-OTH-534152

Brand
E-Z LOK
Item
Self Locking Thread Insert: Heavy Wall, 5/16"-24 Int Thrd Sz, 1/2"-13 Ext Thrd Sz
Category
Heavy Wall Self-Locking Inserts
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Technical Specifications

E-Z LOK
Manufacturer Part Number
303-524-PK5
Type
5 PK
Wall Type
Heavy Wall
Ext Thrd Sz
1/2"-13
Int Thrd Sz
5/16"-24
Thread Type
UNF Internal/UNC External
Compatible Tap Size
1/2"-13
External Thread Fit
2A
Internal Thread Fit
2B
System of Measurement
Inch
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E-Z LOK Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The E-Z LOK Self Locking Thread Insert is a heavy-wall, inch-system insert with a 5/16"-24 UNF internal thread and a 1/2"-13 UNC external thread, supplied in a 5-pack (SKU 4ZB74, MPN 303-524-PK5). It features a 2A external thread fit and a 2B internal thread fit, and is compatible with a 1/2"-13 tap. 3G Electric sources this genuine OEM part across 14 industrial departments, with specialist expertise in combustion, pumps and controls to ensure you get the right solution.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is E-Z LOK Self Locking Thread Insert used for?

E-Z LOK Self Locking Thread Inserts repair or reinforce stripped or worn threads in metal assemblies. The heavy-wall design provides extra strength for demanding applications across machining, power transmission, and industrial equipment. 3G Electric supplies this genuine OEM part for maintenance and repair needs worldwide.

What are the specifications of E-Z LOK 303-524-PK5?

This heavy-wall insert has a 5/16"-24 UNF internal thread and a 1/2"-13 UNC external thread, with 2B internal and 2A external thread fits. It is compatible with a 1/2"-13 tap, uses inch measurement, and comes in a 5-pack (MPN 303-524-PK5).

Where to buy E-Z LOK thread inserts in worldwide?

3G Electric supplies E-Z LOK thread inserts to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver genuine OEM parts like the 303-524-PK5 to your facility. Contact us for availability and delivery to your location.

How to install E-Z LOK heavy wall thread inserts?

Installation requires tapping the hole to the specified external thread size (1/2"-13), then driving the insert into the tapped hole using a standard installation tool. The self-locking feature secures the insert without adhesives. Always follow the manufacturer's instructions for proper torque and depth.

E-Z LOK Products

3G Electric supplies E-Z LOK heavy wall self-locking inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/16"-24 Int Thrd Sz, 1/2"-13 Ext Thrd Sz, 10 PK (MPN 329-524-PK10). Key specifications — Compatible Tap Size: 1/2"-13; Internal Thread Fit: 2B; System of Measurement: Inch; Thread Type: UNF Internal/UNC External; Wall Type: Heavy Wall; External Thread Fit: 2A.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/16"-24 Int Thrd Sz, 1/2"-13 Ext Thrd Sz, 10 PK (MPN 329-524-PK10). Key specifications — Compatible Tap Size: 1/2"-13; Internal Thread Fit: 2B; System of Measurement: Inch; Thread Type: UNF Internal/UNC External; Wall Type: Heavy Wall; External Thread Fit: 2A.
E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/2"-13 Int Thrd Sz, 3/4"-10 Ext Thrd Sz, 5 PK (MPN 329-8-PK5). Key specifications — Compatible Tap Size: 3/4"-10; Internal Thread Fit: 2B; System of Measurement: Inch; Thread Type: Coarse; Wall Type: Heavy Wall; External Thread Fit: 2A.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/2"-13 Int Thrd Sz, 3/4"-10 Ext Thrd Sz, 5 PK (MPN 329-8-PK5). Key specifications — Compatible Tap Size: 3/4"-10; Internal Thread Fit: 2B; System of Measurement: Inch; Thread Type: Coarse; Wall Type: Heavy Wall; External Thread Fit: 2A.
E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/2"-20 Int Thrd Sz, 3/4"-10 Ext Thrd Sz, 5 PK (MPN 329-820-PK5). Key specifications — Compatible Tap Size: 3/4"-10; Internal Thread Fit: 2B; System of Measurement: Inch; Thread Type: UNF Internal/UNC External; Wall Type: Heavy Wall; External Thread Fit: 2A.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/2"-20 Int Thrd Sz, 3/4"-10 Ext Thrd Sz, 5 PK (MPN 329-820-PK5). Key specifications — Compatible Tap Size: 3/4"-10; Internal Thread Fit: 2B; System of Measurement: Inch; Thread Type: UNF Internal/UNC External; Wall Type: Heavy Wall; External Thread Fit: 2A.
E-Z LOK Self Locking Thread Insert: Heavy Wall, #10-32 Int Thrd Sz, M8-1.25 Ext Thrd Sz, Steel, 5 PK (MPN 550-1032 -PK5). Key specifications — Compatible Tap Size: M8-1.25; Internal Thread Fit: 2B; System of Measurement: Inch/Metric; Thread Type: UNF Internal/Metric External; Wall Type: Heavy Wall; External Thread Fit: 2A.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, M6-1.00 Int Thrd Sz, 3/8"-16 Ext Thrd Sz, 5 PK (MPN 653-6-PK5). Key specifications — Compatible Tap Size: 3/8"-16; Internal Thread Fit: 2B; System of Measurement: Inch/Metric; Thread Type: Metric Internal/UNC External; Wall Type: Heavy Wall; External Thread Fit: 2A.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/16"-18 Int Thrd Sz, 1/2"-13 Ext Thrd Sz, 5 PK (MPN 303-5-PK5). Key specifications — Compatible Tap Size: 1/2"-13; Internal Thread Fit: 2B; System of Measurement: Inch; Thread Type: Coarse; Wall Type: Heavy Wall; External Thread Fit: 2A.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/16"-18 Int Thrd Sz, 1/2"-13 Ext Thrd Sz, 5 PK (MPN 303-5-PK5). Key specifications — Compatible Tap Size: 1/2"-13; Internal Thread Fit: 2B; System of Measurement: Inch; Thread Type: Coarse; Wall Type: Heavy Wall; External Thread Fit: 2A.
E-Z LOK Self Locking Thread Insert: Heavy Wall, M8-1.25 Int Thrd Sz, 1/2"-13 Ext Thrd Sz, 5 PK (MPN 653-8-PK5). Key specifications — Compatible Tap Size: 1/2"-13; Internal Thread Fit: 2B; System of Measurement: Inch/Metric; Thread Type: Metric Internal/UNC External; Wall Type: Heavy Wall; External Thread Fit: 2A.
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