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APPROVED VENDOR Key Locking Insert: Thin Wall, 4 Keys, 7/16"-20 Int Thrd Sz, 9/16"-12 Ext Thrd Sz - Mil. Spec. Key-Locking Inserts
APPROVED VENDORMil. Spec. Key-Locking Inserts

APPROVED VENDOR Key Locking Insert: Thin Wall, 4 Keys, 7/16"-20 Int Thrd Sz, 9/16"-12 Ext Thrd Sz

The APPROVED VENDOR Key Locking Insert is a thin-wall, mil-spec insert with 4 keys, 7/16"-20 internal thread size, and 9/16"-12 external thread size. Supplied in a plain finish, 10-pack, this 18-8 stainless steel…

SKU 3G-OTH-531653

Brand
APPROVED VENDOR
Item
Key Locking Insert: Thin Wall, 4 Keys, 7/16"-20 Int Thrd Sz, 9/16"-12 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
Available to Order
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077525
Type
Plain, 10 PK
Keys
4
Wall Type
Thin Wall
Ext Thrd Sz
9/16"-12
Finish Type
Plain
Int Thrd Sz
7/16"-20
Thread Type
Coarse
Industry Standards
MS51832-109
Compatible Tap Size
9/16"-12
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 thin-wall, mil-spec insert with 4 keys, 7/16"-20 internal thread size, and 9/16"-12 external thread size. Supplied in a plain finish, 10-pack, this 18-8 stainless steel insert meets MS51832-109 standards and is compatible with a 9/16"-12 tap size, with external thread fit 2A and internal thread fit 3B.

Frequently Asked Questions

What is a key locking insert used for?

A key locking insert, like the APPROVED VENDOR thin-wall type, is used to repair or reinforce threaded holes in metal assemblies. Its external keys lock it into the parent material, preventing rotation under vibration or load, making it ideal for aerospace, defense, and industrial maintenance applications.

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

This thin-wall insert has 4 keys, a 7/16"-20 internal thread size, and a 9/16"-12 external thread size. It is made of 18-8 stainless steel, plain finish, meets MS51832-109 standards, and comes in a 10-pack. External thread fit is 2A; internal thread fit is 3B.

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 reaches any international destination. Contact us for availability and lead time on this MS51832-109 compliant insert.

How to install a key locking insert?

To install a key locking insert, first drill and tap the hole to the specified compatible tap size (9/16"-12 for this insert). Then, using a proper installation tool, thread the insert into the hole until the keys engage the parent material. Ensure the insert is flush or slightly below the surface for correct locking.

Used in

Common applications for APPROVED VENDOR
Laboratory sampling — APPROVED VENDOR clear wide mouth glass bottles for collecting and storing liquid samples in non-sterile environments.
Steam heating maintenance — APPROVED VENDOR forged brass radiator valves for regulating steam flow in commercial building heating systems.
High-pressure cleaning — APPROVED VENDOR turbo spray nozzles for pressure washers used in industrial equipment cleaning up to 6,000 psi.
Cleanroom operations — APPROVED VENDOR vinyl task chairs for seating in ISO 5 classified manufacturing or assembly areas.
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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