We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

E-Z LOK Heavy Wall Self-Locking Thread Insert - Heavy Wall Self-Locking Inserts
E-Z LOKHeavy Wall Self-Locking Inserts

E-Z LOK Heavy Wall Self-Locking Thread Insert

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

Also listed as: 303820PK5 · 303 820 PK5

Brand
E-Z LOK
Item
Heavy Wall Self-Locking Thread Insert
Category
Heavy Wall Self-Locking Inserts
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

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

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from E-Z LOK

View all E-Z LOK parts
Heavy wall self-locking insert with M16-2.00 metric internal thread and 1"-8 UNC external thread. Made of steel, with 2A external and 2B internal thread fit. Used to repair or reinforce stripped or worn threads in metal assemblies, providing vibration-resistant fastening in industrial machinery and equipment. Supplied in a 5-pack
E-Z LOK
Heavy wall self-locking insert with M16-2.00 metric internal thread and 1"-8 UNC external thread. Made of steel, with 2A external and 2B internal thread fit. Used to repair or reinforce stripped or worn threads in metal assemblies, providing vibration-resistant fastening in industrial machinery and equipment. Supplied in a 5-pack
Heavy wall self-locking thread insert with 3/8"-24 UNF internal thread and 9/16"-12 UNC external thread. External thread fit 2A, internal thread fit 2B. Compatible with 9/16"-12 tap. Used to repair or reinforce threads in metal or plastic, providing vibration-resistant connections in industrial machinery and equipment. Supplied in a 10-pack
E-Z LOK
Heavy wall self-locking thread insert with 3/8"-24 UNF internal thread and 9/16"-12 UNC external thread. External thread fit 2A, internal thread fit 2B. Compatible with 9/16"-12 tap. Used to repair or reinforce threads in metal or plastic, providing vibration-resistant connections in industrial machinery and equipment. Supplied in a 10-pack
Heavy wall self-locking thread insert with M8-1.25 internal thread size and M12-1.75 external thread size. Compatible with M12-1.75 tap, featuring 6H internal and 6G external thread fit. Used to repair or reinforce stripped or worn threads in metal or plastic, resisting vibration loosening. Supplied in a 5-pack
E-Z LOK
Heavy wall self-locking thread insert with M8-1.25 internal thread size and M12-1.75 external thread size. Compatible with M12-1.75 tap, featuring 6H internal and 6G external thread fit. Used to repair or reinforce stripped or worn threads in metal or plastic, resisting vibration loosening. Supplied in a 5-pack
Heavy wall self-locking insert with M8-1.25 internal thread and M12-1.75 external thread. Features 6H internal and 6G external thread fits. Compatible with M12-1.75 tap. Pack of 5. Used to repair or reinforce threads in metal assemblies requiring high pull-out strength
E-Z LOK
Heavy wall self-locking insert with M8-1.25 internal thread and M12-1.75 external thread. Features 6H internal and 6G external thread fits. Compatible with M12-1.75 tap. Pack of 5. Used to repair or reinforce threads in metal assemblies requiring high pull-out strength
Steel heavy-wall self-locking thread insert with #4-40 internal thread size and #10-32 external thread size. Coarse thread type, compatible tap size #10-32, external thread fit 2A, internal thread fit 2B. Supplied in a 10-pack. Used to repair or reinforce stripped threads in metal assemblies
E-Z LOK
Steel heavy-wall self-locking thread insert with #4-40 internal thread size and #10-32 external thread size. Coarse thread type, compatible tap size #10-32, external thread fit 2A, internal thread fit 2B. Supplied in a 10-pack. Used to repair or reinforce stripped threads in metal assemblies
Heavy wall self-locking insert with M8-1.25 internal thread and 1/2-13 external thread. Metric internal/UNC external thread type with 2B internal fit and 2A external fit. Compatible with 1/2-13 tap. Used for thread repair or reinforcement in metal or plastic substrates where vibration resistance is needed
E-Z LOK
Heavy wall self-locking insert with M8-1.25 internal thread and 1/2-13 external thread. Metric internal/UNC external thread type with 2B internal fit and 2A external fit. Compatible with 1/2-13 tap. Used for thread repair or reinforcement in metal or plastic substrates where vibration resistance is needed
Steel heavy wall self-locking thread insert with 5/8"-11 internal and 7/8"-9 external coarse threads. External thread fit 2A, internal fit 2B. Compatible with 7/8"-9 tap. Used for thread repair or reinforcement in heavy-duty applications requiring a durable, self-locking steel thread in inch-system coarse threads
E-Z LOK
Steel heavy wall self-locking thread insert with 5/8"-11 internal and 7/8"-9 external coarse threads. External thread fit 2A, internal fit 2B. Compatible with 7/8"-9 tap. Used for thread repair or reinforcement in heavy-duty applications requiring a durable, self-locking steel thread in inch-system coarse threads
Metric heavy wall self-locking insert with M6-1.00 internal thread and M10-1.50 external thread. Features 6H internal and 6G external thread fits, compatible with M10-1.50 tap. Used to repair or reinforce stripped threads in metal or plastic, providing vibration-resistant threads in industrial machinery and equipment maintenance
E-Z LOK
Metric heavy wall self-locking insert with M6-1.00 internal thread and M10-1.50 external thread. Features 6H internal and 6G external thread fits, compatible with M10-1.50 tap. Used to repair or reinforce stripped threads in metal or plastic, providing vibration-resistant threads in industrial machinery and equipment maintenance