OEM Key Locking Insert: Heavy Wall
The APPROVED VENDOR Key Locking Insert is a heavy-wall, inch-system mil-spec insert with #4-40 internal thread size and #12-24 external thread size, supplied in a 10-pack with 2 keys. It is made from 303 stainless…
SKU 3G-OTH-531617
Also listed as: 217077290 · 217 077290
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, inch-system mil-spec insert with #4-40 internal thread size and #12-24 external thread size, supplied in a 10-pack with 2 keys. It is made from 303 stainless steel with a plain finish, coarse thread type, external thread fit 2A, internal thread fit 3B, and compatible tap size #12-24, meeting MIL-I-45914A (MS51831) standards.
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 meets MIL-I-45914A (MS51831) for aerospace and defense applications, with 303 stainless steel construction and two locking keys.
What are the specifications of the APPROVED VENDOR key locking insert?
This heavy-wall insert has #4-40 internal thread size and #12-24 external thread size, with external thread fit 2A and internal thread fit 3B. It is made from 303 stainless steel, plain finish, coarse thread, compatible tap size #12-24, and meets MIL-I-45914A (MS51831). Supplied in a 10-pack with 2 keys.
Where to buy APPROVED VENDOR key locking inserts worldwide?
3G Electric supplies APPROVED VENDOR key locking inserts worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver genuine mil-spec inserts like the 217-077290 heavy-wall 10-pack to any international destination.
How to install a key locking insert?
Installation requires drilling to the compatible tap size (#12-24), tapping the hole, then threading the insert using the provided keys until it sits slightly below the surface. The keys lock the insert in place. Follow MIL-I-45914A guidelines for torque and depth to ensure a secure, permanent thread repair.
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.
