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E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/4"-20 Int Thrd Sz, 7/16"-14 Ext Thrd Sz - Heavy Wall Self-Locking Inserts
E-Z LOKHeavy Wall Self-Locking Inserts

E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/4"-20 Int Thrd Sz, 7/16"-14 Ext Thrd Sz

The E-Z LOK Self Locking Thread Insert is a heavy-wall, inch-system insert with a 1/4"-20 internal thread size and a 7/16"-14 external thread size, compatible with a 7/16"-14 tap. It features coarse threads, external…

SKU 3G-OTH-534105

Brand
E-Z LOK
Item
Self Locking Thread Insert: Heavy Wall, 1/4"-20 Int Thrd Sz, 7/16"-14 Ext Thrd Sz
Category
Heavy Wall Self-Locking Inserts
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Technical Specifications

E-Z LOK
Manufacturer Part Number
303-4-PK5
Type
5 PK
Wall Type
Heavy Wall
Ext Thrd Sz
7/16"-14
Int Thrd Sz
1/4"-20
Thread Type
Coarse
Compatible Tap Size
7/16"-14
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 1/4"-20 internal thread size and a 7/16"-14 external thread size, compatible with a 7/16"-14 tap. It features coarse threads, external thread fit 2A, internal thread fit 2B, and is supplied in a 5-pack (MPN 303-4-PK5).

Frequently Asked Questions

What is the E-Z LOK 303-4-PK5 thread insert used for?

The E-Z LOK 303-4-PK5 is a heavy-wall self-locking thread insert used to repair or reinforce tapped holes in metal, plastic, or wood. It provides a durable 1/4"-20 internal thread with a 7/16"-14 external thread, ideal for industrial applications requiring vibration resistance and load distribution.

What are the specifications of the E-Z LOK 303-4-PK5 thread insert?

The E-Z LOK 303-4-PK5 is a 5-pack of heavy-wall inch-system inserts. Internal thread size is 1/4"-20 with 2B fit; external thread size is 7/16"-14 with 2A fit. Compatible tap size is 7/16"-14. Thread type is coarse. Manufacturer part number is 303-4-PK5.

Where to buy E-Z LOK 303-4-PK5 thread inserts worldwide?

3G Electric supplies E-Z LOK 303-4-PK5 thread inserts 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 5-pack of heavy-wall self-locking inserts.

How to install an E-Z LOK heavy-wall thread insert?

To install the E-Z LOK 303-4-PK5, drill a hole to the recommended size, tap it with a 7/16"-14 tap, then thread the insert into the tapped hole using a standard installation tool. The self-locking feature secures the insert without adhesives. Follow generic best practices for thread insert installation.

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, 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, 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, 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, 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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