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APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 5/8"-11 Int Thrd Sz, 1"-12 Ext Thrd Sz - Mil. Spec. Key-Locking Inserts
APPROVED VENDORMil. Spec. Key-Locking Inserts

APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 5/8"-11 Int Thrd Sz, 1"-12 Ext Thrd Sz

The APPROVED VENDOR Key Locking Insert is a Mil. Spec. key-locking insert with an Extra Heavy Wall, featuring 4 keys, a 5/8"-11 internal thread size, and a 1"-12 external thread size. Supplied in a plain finish…

SKU 3G-OTH-531803

Brand
APPROVED VENDOR
Item
Key Locking Insert: Extra Heavy Wall, 4 Keys, 5/8"-11 Int Thrd Sz, 1"-12 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
Available to Order
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-076340
Type
Plain, 10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
1"-12
Finish Type
Plain
Int Thrd Sz
5/8"-11
Thread Type
Coarse
Industry Standards
MS51832-103L
Compatible Tap Size
1"-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 Mil. Spec. key-locking insert with an Extra Heavy Wall, featuring 4 keys, a 5/8"-11 internal thread size, and a 1"-12 external thread size. Supplied in a plain finish, 10-pack, this inch-system insert meets MS51832-103L standards, is made from 18-8 material, and has external thread fit 2A and internal thread fit 3B.

Frequently Asked Questions

What is a Mil. Spec. key-locking insert used for?

A Mil. Spec. key-locking insert, like the APPROVED VENDOR Extra Heavy Wall version, is used to repair or reinforce threaded holes in metal assemblies. The four keys lock the insert into place, preventing rotation under vibration. It is common in aerospace, defense, and heavy equipment applications where reliable thread strength is critical.

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

This insert has an Extra Heavy Wall, 4 keys, a 5/8"-11 internal thread size, and a 1"-12 external thread size. It meets MS51832-103L standards, is made from 18-8 stainless steel, and has external thread fit 2A and internal thread fit 3B. Supplied in a plain finish, 10-pack, inch system.

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 arrives at your facility. Contact us for availability and lead time on this MS51832-103L compliant insert.

How to install a key-locking insert?

To install a key-locking insert, drill and tap the hole to the specified compatible tap size (1"-12 for this insert). Thread the insert into the hole using a proper installation tool, then drive the keys down into the parent material using a key-setting tool. This locks the insert against rotation. Always follow the manufacturer's instructions for torque and tooling.

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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