OEM Key Locking Insert: Heavy Wall, 4 Keys, 5/8"-18 Int Thrd Sz, 7/8"-14 Ext Thrd Sz
The APPROVED VENDOR Key Locking Insert is a heavy-wall, mil-spec insert with 4 keys, 5/8"-18 internal thread size, and 7/8"-14 external thread size. It is plain finish, 18-8 material, inch system, and meets…
SKU 3G-OTH-531764
Also listed as: 217077508 · 217 077508
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, 5/8"-18 internal thread size, and 7/8"-14 external thread size. It is plain finish, 18-8 material, inch system, and meets MS51831-109L. Supplied as a 10-pack (MPN 217-077508).
Frequently Asked Questions
What is a key locking insert used for?
A key locking insert repairs or reinforces tapped holes in soft materials like aluminum. The external keys lock the insert in place, preventing rotation under vibration. This heavy-wall, mil-spec insert from APPROVED VENDOR is used in aerospace, defense, and industrial applications requiring reliable thread restoration.
What are the specifications of the APPROVED VENDOR key locking insert?
This heavy-wall insert has a 5/8"-18 internal thread and 7/8"-14 external thread, with 4 keys. It is made of 18-8 stainless steel, plain finish, inch system, and meets MS51831-109L. External thread fit is 2A, internal fit is 3B. Supplied as a 10-pack (MPN 217-077508).
Where to buy APPROVED VENDOR key locking inserts worldwide?
3G Electric supplies APPROVED VENDOR key locking inserts worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this MS51831-109L compliant 10-pack.
How to install a key locking insert?
Installation requires drilling out the damaged thread to the specified tap size (7/8"-14), tapping the hole, then driving the insert using a key locking insert tool. The 4 keys lock into the parent material. Use thread locker for added security. Follow MS51831 guidelines for torque and depth.
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.