OEM Key Locking Insert
The APPROVED VENDOR Key Locking Insert is a heavy-wall, mil. spec. insert with 4 keys, M4-0.70 internal thread size, M8x1.25 external thread size, plain finish, and 18-8 material. It meets Fed Std. H28/21 and MJ Form…
SKU 3G-OTH-531685
Also listed as: 217076363 · 217 076363
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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Product Description
The APPROVED VENDOR Key Locking Insert is a heavy-wall, mil. spec. insert with 4 keys, M4-0.70 internal thread size, M8x1.25 external thread size, plain finish, and 18-8 material. It meets Fed Std. H28/21 and MJ Form standards, with 2A external and 3B internal thread fits, compatible with M8x1.25 tap size, sold in a 10-pack (MPN 217-076363).
Frequently Asked Questions
What is a key locking insert used for?
A key locking insert is used to repair or reinforce tapped threads in metal assemblies, providing a strong, reusable thread in softer materials. The APPROVED VENDOR heavy-wall insert with 4 keys meets mil. spec. Fed Std. H28/21 and MJ Form standards, making it suitable for aerospace, defense, and industrial applications requiring high reliability.
What are the specifications of the APPROVED VENDOR key locking insert?
This heavy-wall insert has M4-0.70 internal thread size and M8x1.25 external thread size, with 2A external and 3B internal thread fits. It is made from 18-8 stainless steel, plain finish, compatible with M8x1.25 tap size, and meets Fed Std. H28/21 and MJ Form standards. Sold in a 10-pack (MPN 217-076363).
Where to buy APPROVED VENDOR key locking inserts worldwide?
3G Electric supplies APPROVED VENDOR key locking inserts worldwide, handling full logistics and customs clearance for global delivery. As a sourcing partner across 14 industrial departments, we provide these mil. spec. inserts with 4 keys, M4-0.70 internal thread, and M8x1.25 external thread, ensuring compliance with Fed Std. H28/21 and MJ Form standards.
How to install a key locking insert?
To install, drill and tap the hole to the specified compatible tap size (M8x1.25), then use a key locking insert tool to wind the insert into the tapped hole until the keys engage. The 4 keys lock the insert in place, preventing rotation. Follow standard thread repair practices and torque specifications for 18-8 stainless steel inserts.
OEM Products
3G Electric supplies OEM mil. spec. key-locking inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
