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
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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.
Frequently Asked Questions
Is the E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/16"-24 Int Thrd Sz, 1/2"-13 Ext Thrd Sz available from 3G Electric?
Yes — 3G Electric supplies genuine E-Z LOK products, available to order with worldwide shipping. Contact us for current lead time.
How do I get a quote for the E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/16"-24 Int Thrd Sz, 1/2"-13 Ext Thrd Sz?
Click "Request a Quote" on this page or add the product to your RFQ cart. Our engineers will respond within 24 hours with pricing, lead times, and technical recommendations.
Does 3G Electric provide technical support for heavy wall self-locking inserts?
Yes, our team of experienced engineers provides full technical support including product selection, installation guidance, commissioning, and after-sales service for all heavy wall self-locking inserts we distribute.
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.









