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E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/16"-18 Int Thrd Sz, M12-1.75 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"-18 Int Thrd Sz, M12-1.75 Ext Thrd Sz

The E-Z LOK Self Locking Thread Insert is a heavy-wall insert with a 5/16"-18 UNC internal thread and M12-1.75 metric external thread, supplied in a 5-pack. It features a 2A external thread fit and 2B internal thread…

SKU 3G-OTH-534113

Brand
E-Z LOK
Item
Self Locking Thread Insert: Heavy Wall, 5/16"-18 Int Thrd Sz, M12-1.75 Ext Thrd Sz
Category
Heavy Wall Self-Locking Inserts
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Technical Specifications

E-Z LOK
Manufacturer Part Number
550-5-PK5
Type
M12-1.75 Ext Thrd Sz, 5 PK
Wall Type
Heavy Wall
Int Thrd Sz
5/16"-18
Thread Type
UNC Internal/Metric External
Compatible Tap Size
M12-1.75
External Thread Fit
2A
Internal Thread Fit
2B
System of Measurement
Inch/Metric
View Full Spec Sheet

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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 insert with a 5/16"-18 UNC internal thread and M12-1.75 metric external thread, supplied in a 5-pack. It features a 2A external thread fit and 2B internal thread fit, compatible with an M12-1.75 tap. This inch/metric insert is designed for applications requiring a secure, self-locking thread repair or reinforcement.

Frequently Asked Questions

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

The E-Z LOK Self Locking Thread Insert is used for thread repair or reinforcement in heavy-duty applications. Its self-locking design secures fasteners against vibration, making it suitable for industrial machinery, automotive, and equipment maintenance where reliable thread integrity is critical.

What are the specifications of the E-Z LOK 550-5-PK5 thread insert?

This heavy-wall insert has a 5/16"-18 UNC internal thread and M12-1.75 metric external thread, with 2B internal and 2A external thread fits. It is compatible with an M12-1.75 tap, uses inch/metric measurement, and comes in a 5-pack (MPN 550-5-PK5).

Where to buy E-Z LOK thread inserts worldwide?

3G Electric supplies E-Z LOK thread inserts worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver genuine parts like the 550-5-PK5 to any location, ensuring compliance with international shipping requirements.

How to install an E-Z LOK self-locking thread insert?

To install, drill out the damaged thread to the recommended size, tap the hole using the compatible M12-1.75 tap, then insert the E-Z LOK insert using a standard installation tool. The self-locking feature engages upon insertion, providing a secure, vibration-resistant thread without adhesives.

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 453-12-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, 5/8"-18 Int Thrd Sz, 7/8"-9 Ext Thrd Sz, Steel, 5 PK (MPN 329-10F-PK5). Key specifications — Compatible Tap Size: 7/8"-9; 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, 5/8"-18 Int Thrd Sz, 7/8"-9 Ext Thrd Sz, Steel, 5 PK (MPN 329-10F-PK5). Key specifications — Compatible Tap Size: 7/8"-9; 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, #8-32 Int Thrd Sz, M8-1.25 Ext Thrd Sz, Steel, 5 PK (MPN 550-008-PK5). Key specifications — Compatible Tap Size: M8-1.25; 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, #8-32 Int Thrd Sz, M8-1.25 Ext Thrd Sz, Steel, 5 PK (MPN 550-008-PK5). Key specifications — Compatible Tap Size: M8-1.25; Internal Thread Fit: 2B; System of Measurement: Inch/Metric; Thread Type: UNC Internal/Metric External; Wall Type: Heavy Wall; External Thread Fit: 2A.
E-Z LOK Self Locking Thread Insert: Heavy Wall, M10-1.50 Int Thrd Sz, M16-2.00 Ext Thrd Sz, 5 PK (MPN 453-10-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, M10-1.50 Int Thrd Sz, M16-2.00 Ext Thrd Sz, 5 PK (MPN 453-10-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, #10-24 Int Thrd Sz, 3/8"-16 Ext Thrd Sz, Plain, 5 PK (MPN 303-3-PK5). Key specifications — Compatible Tap Size: 3/8"-16; 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, #10-24 Int Thrd Sz, 3/8"-16 Ext Thrd Sz, Plain, 5 PK (MPN 303-3-PK5). Key specifications — Compatible Tap Size: 3/8"-16; 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 303-820-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, M16-2.00 Int Thrd Sz, 1"-8 Ext Thrd Sz, Steel, 5 PK (MPN 650-16-PK5). Key specifications — Compatible Tap Size: #1-8; 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, 3/8"-24 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 10 PK (MPN 329-624-PK10). 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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