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-531801
Also listed as: 217077363 · 217 077363
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
Need installation or engineering help?
Ask a question
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 a 2A external and 3B internal thread fit, compatible with M8x1.25 tap size, sold in a 10-pack (MPN 217-077363).
Frequently Asked Questions
What is an APPROVED VENDOR key locking insert used for?
This heavy-wall key locking insert with 4 keys is used to repair or reinforce threaded holes in metal assemblies, particularly in aerospace and defense applications. It meets Fed Std. H28/21 and MJ Form standards, ensuring reliable thread engagement for M4-0.70 internal and M8x1.25 external threads.
What are the specifications of the APPROVED VENDOR key locking insert?
This insert has an M4-0.70 internal thread size and M8x1.25 external thread size, with a heavy wall, plain finish, and 18-8 material grade. It features 4 keys, a 2A external thread fit, 3B internal thread fit, and meets Fed Std. H28/21 and MJ Form standards. Sold in a 10-pack (MPN 217-077363).
Where to buy APPROVED VENDOR key locking inserts worldwide?
3G Electric supplies and delivers APPROVED VENDOR key locking inserts worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to ensure your order arrives at your facility. Contact us for availability and lead time on this 10-pack (MPN 217-077363).
How to install an APPROVED VENDOR key locking insert?
Installation requires tapping the hole to M8x1.25, then using a compatible installation tool to drive the insert until the keys engage. Ensure the external thread fit is 2A and internal fit is 3B for proper locking. Follow standard mil-spec practices for key locking inserts to avoid cross-threading.
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.