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APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 7/8"-9 Int Thrd Sz, 1 3/8"-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, 7/8"-9 Int Thrd Sz, 1 3/8"-12 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 7/8"-9 internal thread size, a 1 3/8"-12 external thread size, and is…

SKU 3G-OTH-531672

Brand
APPROVED VENDOR
Item
Key Locking Insert: Extra Heavy Wall, 4 Keys, 7/8"-9 Int Thrd Sz, 1 3/8"-12 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
Available to Order
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077342
Type
10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
1 3/8"-12
Finish Type
Plain
Int Thrd Sz
7/8"-9
Thread Type
Coarse
Drill Bit Size
1-19/64 in
Industry Standards
MS51830-205L
Compatible Tap Size
1-3/8"-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, supplied in a 10 PK. It features 4 keys, a 7/8"-9 internal thread size, a 1 3/8"-12 external thread size, and is made from 18-8 material. The insert meets MS51830-205L standards, with a compatible tap size of 1-3/8"-12 and a drill bit size of 1-19/64 in.

Frequently Asked Questions

What is a key locking insert used for?

A key locking insert repairs or reinforces stripped threads in metal assemblies, providing a permanent, high-strength thread. The APPROVED VENDOR Extra Heavy Wall version with 4 keys is designed for demanding applications where vibration resistance is critical, such as aerospace or military equipment.

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

This Mil. Spec. insert has an Extra Heavy Wall, 7/8"-9 internal thread, 1 3/8"-12 external thread, 4 keys, and a 10 PK. It is made from 18-8 material, meets MS51830-205L, requires a 1-19/64 in drill bit and 1-3/8"-12 tap, with 2A external and 3B internal thread fits.

Where to buy APPROVED VENDOR key locking inserts worldwide?

3G Electric supplies the APPROVED VENDOR Key Locking Insert (MPN 217-077342) to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this Mil. Spec. insert to your facility, regardless of location.

How to install a key locking insert?

Installation requires drilling to the specified 1-19/64 in size, tapping with a 1-3/8"-12 tap, then driving the insert using a key-locking tool until the keys engage. The 4 keys lock the insert against rotation. Always follow the manufacturer's torque and depth guidelines for the 18-8 material.

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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