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APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 1/2"-20 Int Thrd Sz, 13/16"-16 Ext Thrd Sz - Mil. Spec. Key-Locking Inserts
APPROVED VENDORMil. Spec. Key-Locking Inserts

APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 1/2"-20 Int Thrd Sz, 13/16"-16 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 4 keys, a 1/2"-20 internal thread size, a 13/16"-16 external thread size, and meets…

SKU 3G-OTH-531767

Brand
APPROVED VENDOR
Item
Key Locking Insert: Extra Heavy Wall, 4 Keys, 1/2"-20 Int Thrd Sz, 13/16"-16 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
Available to Order
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077538
Type
10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
13/16"-16
Finish Type
Plain
Int Thrd Sz
1/2"-20
Thread Type
Coarse
Industry Standards
MS51832-206L
Compatible Tap Size
13/16"-16
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 4 keys, a 1/2"-20 internal thread size, a 13/16"-16 external thread size, and meets MS51832-206L. Made from 18-8 material with a Plain finish, it has an external thread fit of 2A and internal thread fit of 3B.

Frequently Asked Questions

What is an APPROVED VENDOR Key Locking Insert used for?

This Mil. Spec. key-locking insert repairs or reinforces tapped holes in metal assemblies, especially where vibration could loosen standard threads. The extra heavy wall and 4 keys provide high pull-out resistance. It is commonly used in aerospace, defense, and industrial equipment requiring MS51832-206L compliance.

What are the specifications of the APPROVED VENDOR Key Locking Insert 217-077538?

This 10-pack insert has a 1/2"-20 internal thread and 13/16"-16 external thread, with an extra heavy wall. It is made from 18-8 stainless steel, plain finish, with external thread fit 2A and internal thread fit 3B. It meets Mil. Spec. MS51832-206L and requires a 13/16"-16 tap.

Where to buy APPROVED VENDOR Key Locking Inserts worldwide?

3G Electric supplies APPROVED VENDOR key locking inserts to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial sourcing partner, we provide genuine Mil. Spec. inserts like the 217-077538 with 18-8 material and extra heavy wall construction.

How to install an APPROVED VENDOR Key Locking Insert?

First, tap the hole to the compatible tap size (13/16"-16 for this insert). Then, screw the insert into the tapped hole using a key-locking insert installation tool. After installation, the 4 keys are set into the parent material to prevent rotation. Use a thread locking compound for critical applications.

Used in

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General sealing — APPROVED VENDOR natural rubber stoppers for closing laboratory flasks or test tubes in educational or research settings.
Tamper-evident security — APPROVED VENDOR brass lead and wire seals for securing utility meters, cargo containers, or access panels.

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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Key Locking Insert: Extra Heavy Wall, 4 Keys, 1/2"-20 Int Thrd Sz, 13/16"-16 Ext Thrd Sz, 10 PK (MPN 217-076538). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 13/16"-16; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: NAS1395C3L; System of Measurement: Inch.
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Key Locking Insert: Extra Heavy Wall, 4 Keys, 3/8"-16 Int Thrd Sz, 5/8"-11 Ext Thrd Sz, Plain, 10 PK (MPN 217-076336). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 5/8"-11; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51830-109L; System of Measurement: Inch.
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Key Locking Insert: Heavy Wall, 4 Keys, 9/16"-18 Int Thrd Sz, 13/16"-16 Ext Thrd Sz, Plain, 10 PK (MPN 217-076507). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 13/16"-16; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-201; System of Measurement: Inch.
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