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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 - Heavy Wall Self-Locking Inserts
E-Z LOKHeavy Wall Self-Locking Inserts

E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/2"-20 Int Thrd Sz, 3/4"-10 Ext Thrd Sz

The E-Z LOK Self Locking Thread Insert is a heavy-wall, inch-system insert with a 1/2"-20 UNF internal thread and a 3/4"-10 UNC external thread, supplied as a 5-pack (MPN 303-820-PK5). It features a 2B internal…

SKU 3G-OTH-534159

Brand
E-Z LOK
Item
Self Locking Thread Insert: Heavy Wall, 1/2"-20 Int Thrd Sz, 3/4"-10 Ext Thrd Sz
Category
Heavy Wall Self-Locking Inserts
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Technical Specifications

E-Z LOK
Manufacturer Part Number
303-820-PK5
Type
5 PK
Wall Type
Heavy Wall
Ext Thrd Sz
3/4"-10
Int Thrd Sz
1/2"-20
Thread Type
UNF Internal/UNC External
Compatible Tap Size
3/4"-10
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 1/2"-20 UNF internal thread and a 3/4"-10 UNC external thread, supplied as a 5-pack (MPN 303-820-PK5). It features a 2B internal thread fit and a 2A external thread fit, compatible with a 3/4"-10 tap size. 3G Electric interprets customer demand and delivers genuine industrial equipment across 14 departments — and far more — with specialist depth in combustion, pumps and controls as an authorised distributor for brands including E-Z LOK, Schneider, ABB, Siemens, SKF, Festo, Fluke, Interpump and FBR.

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 threads in metal assemblies. The heavy-wall design suits high-stress applications across industrial machinery, automotive, and aerospace. 3G Electric supplies genuine E-Z LOK inserts worldwide, backed by specialist expertise in combustion, pumps, and controls.

What are the specifications of E-Z LOK 303-820-PK5?

The E-Z LOK 303-820-PK5 is a 5-pack of heavy-wall thread inserts with a 1/2"-20 UNF internal thread and a 3/4"-10 UNC external thread. It requires a 3/4"-10 tap, has 2B internal and 2A external thread fits, and is inch-system. 3G Electric sources this genuine E-Z LOK part for global delivery.

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

3G Electric supplies E-Z LOK Self Locking Thread Inserts to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance for international orders. Contact us to source the 303-820-PK5 or any E-Z LOK heavy-wall insert for your application.

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

Install E-Z LOK heavy wall inserts by tapping a 3/4"-10 UNC hole to the correct depth, then driving the insert using a standard installation tool until it sits flush or slightly below the surface. The self-locking feature engages upon insertion. 3G Electric can advise on tooling and best practices for your specific material.

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, M16-2.00 Int Thrd Sz, M24-3.00 Ext Thrd Sz, 5 PK (MPN 450-16-PK5). Key specifications — Compatible Tap Size: M24-3.00; Internal Thread Fit: 6H; System of Measurement: Metric; Thread Type: Metric; Wall Type: Heavy Wall; Drill Bit Size: 21 mm; External Thread Fit: 6G.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, M16-2.00 Int Thrd Sz, M24-3.00 Ext Thrd Sz, 5 PK (MPN 450-16-PK5). Key specifications — Compatible Tap Size: M24-3.00; Internal Thread Fit: 6H; System of Measurement: Metric; Thread Type: Metric; Wall Type: Heavy Wall; Drill Bit Size: 21 mm; External Thread Fit: 6G.
E-Z LOK Self Locking Thread Insert: Heavy Wall, M12-1.75 Int Thrd Sz, M16-2.00 Ext Thrd Sz, 5 PK (MPN 450-12-PK5). Key specifications — Compatible Tap Size: M16-2.00; Internal Thread Fit: 6H; System of Measurement: Metric; Thread Type: Metric; Wall Type: Heavy Wall; Drill Bit Size: 14 mm; External Thread Fit: 6G.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, M12-1.75 Int Thrd Sz, M16-2.00 Ext Thrd Sz, 5 PK (MPN 450-12-PK5). Key specifications — Compatible Tap Size: M16-2.00; Internal Thread Fit: 6H; System of Measurement: Metric; Thread Type: Metric; Wall Type: Heavy Wall; Drill Bit Size: 14 mm; External Thread Fit: 6G.
E-Z LOK Self Locking Thread Insert: Heavy Wall, M5-0.80 Int Thrd Sz, M8-1.25 Ext Thrd Sz, 10 PK (MPN 450-5-PK10). Key specifications — Compatible Tap Size: M8-1.25; Internal Thread Fit: 6H; System of Measurement: Metric; Thread Type: Metric; Wall Type: Heavy Wall; External Thread Fit: 6G.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, M5-0.80 Int Thrd Sz, M8-1.25 Ext Thrd Sz, 10 PK (MPN 450-5-PK10). Key specifications — Compatible Tap Size: M8-1.25; Internal Thread Fit: 6H; System of Measurement: Metric; Thread Type: Metric; Wall Type: Heavy Wall; External Thread Fit: 6G.
E-Z LOK Self Locking Thread Insert: Heavy Wall, M6-1.00 Int Thrd Sz, M10-1.50 Ext Thrd Sz, 5 PK (MPN 453-6-PK5). Key specifications — Compatible Tap Size: M10-1.50; Internal Thread Fit: 6H; System of Measurement: Metric; Thread Type: Metric; Wall Type: Heavy Wall; External Thread Fit: 6G.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, M6-1.00 Int Thrd Sz, M10-1.50 Ext Thrd Sz, 5 PK (MPN 453-6-PK5). Key specifications — Compatible Tap Size: M10-1.50; Internal Thread Fit: 6H; System of Measurement: Metric; Thread Type: Metric; Wall Type: Heavy Wall; External Thread Fit: 6G.
E-Z LOK Self Locking Thread Insert: Heavy Wall, 3/8"-24 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 5 PK (MPN 303-624-PK5). Key specifications — Compatible Tap Size: 9/16"-12; 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, 3/8"-24 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 5 PK (MPN 303-624-PK5). Key specifications — Compatible Tap Size: 9/16"-12; 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, M10-1.50 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 5 PK (MPN 653-10-PK5). Key specifications — Compatible Tap Size: 9/16"-12; 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, M10-1.50 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 5 PK (MPN 653-10-PK5). Key specifications — Compatible Tap Size: 9/16"-12; Internal Thread Fit: 2B; System of Measurement: Inch/Metric; Thread Type: Metric Internal/UNC External; Wall Type: Heavy Wall; External Thread Fit: 2A.
E-Z LOK Self Locking Thread Insert: Heavy Wall, 7/8"-9 Int Thrd Sz, 1 1/4"-7 Ext Thrd Sz, 5 PK (MPN 329-14-PK5). Key specifications — Compatible Tap Size: 1-1/4"-7; 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, 7/8"-9 Int Thrd Sz, 1 1/4"-7 Ext Thrd Sz, 5 PK (MPN 329-14-PK5). Key specifications — Compatible Tap Size: 1-1/4"-7; 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, 1/4"-20 Int Thrd Sz, M10-1.50 Ext Thrd Sz, 5 PK (MPN 550-1420 -PK5). Key specifications — Compatible Tap Size: M10-1.50; Internal Thread Fit: 2B; System of Measurement: Inch/Metric; Thread Type: UNC Internal/Metric External; Wall Type: Heavy Wall; External Thread Fit: 2A.
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E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/4"-20 Int Thrd Sz, M10-1.50 Ext Thrd Sz, 5 PK (MPN 550-1420 -PK5). Key specifications — Compatible Tap Size: M10-1.50; Internal Thread Fit: 2B; System of Measurement: Inch/Metric; Thread Type: UNC Internal/Metric External; Wall Type: Heavy Wall; External Thread Fit: 2A.