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APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 7/16"-14 Int Thrd Sz, 11/16"-11 Ext Thrd Sz - Mil. Spec. Key-Locking Inserts
APPROVED VENDORMil. Spec. Key-Locking Inserts

APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 7/16"-14 Int Thrd Sz, 11/16"-11 Ext Thrd Sz

The APPROVED VENDOR Key Locking Insert is a Mil. Spec. key-locking insert with an Extra Heavy Wall, supplied in a 10 PK. It features a 7/16"-14 internal thread size and an 11/16"-11 external thread size, with 4 keys…

SKU 3G-OTH-531741

Brand
APPROVED VENDOR
Item
Key Locking Insert: Extra Heavy Wall, 4 Keys, 7/16"-14 Int Thrd Sz, 11/16"-11 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077337
Type
10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
11/16"-11
Finish Type
Plain
Int Thrd Sz
7/16"-14
Thread Type
Coarse
Industry Standards
MS51831-211L
Compatible Tap Size
11/16"-11
External Thread Fit
2A
Internal Thread Fit
3B
Material Grade/Class
18-8
System of Measurement
Inch
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APPROVED VENDOR Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The APPROVED VENDOR Key Locking Insert is a Mil. Spec. key-locking insert with an Extra Heavy Wall, supplied in a 10 PK. It features a 7/16"-14 internal thread size and an 11/16"-11 external thread size, with 4 keys, a plain finish, and coarse thread type. Made from 18-8 material with external thread fit 2A and internal thread fit 3B, it meets industry standard MS51831-211L and is compatible with tap size 11/16"-11.

Frequently Asked Questions

What is a key locking insert used for?

A key locking insert repairs or reinforces threads in soft materials like aluminum. The external keys lock the insert into the parent material, preventing rotation under load. This APPROVED VENDOR Extra Heavy Wall insert meets Mil. Spec. MS51831-211L for high-strength applications in aerospace, defense, and industrial equipment.

What are the specifications of the APPROVED VENDOR key locking insert?

This insert has a 7/16"-14 internal thread and 11/16"-11 external thread, with an Extra Heavy Wall and 4 keys. It is made from 18-8 stainless steel, with external thread fit 2A and internal thread fit 3B. The 10-pack meets Mil. Spec. MS51831-211L and is compatible with tap size 11/16"-11.

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 Mil. Spec. MS51831-211L insert in a 10-pack.

How to install a key locking insert?

Installation requires drilling to the specified tap size (11/16"-11 for this insert), tapping the hole, then driving the insert using a key locking insert tool. The 4 external keys must align with slots cut in the parent material. Use thread locking compound for vibration resistance. Follow Mil. Spec. MS51831 guidelines for torque values.

Used in

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APPROVED VENDOR Products

3G Electric supplies APPROVED VENDOR mil. spec. key-locking inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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