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

APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 1/4"-20 Int Thrd Sz, 1/2"-13 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 1/4"-20 internal thread size, and a 1/2"-13 external thread size. Supplied as a plain, 10-pack…

SKU 3G-OTH-531807

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

APPROVED VENDOR
Manufacturer Part Number
217-076534
Type
Plain, 10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
1/2"-13
Finish Type
Plain
Int Thrd Sz
1/4"-20
Thread Type
Coarse
Industry Standards
MS51832-108L
Compatible Tap Size
1/2"-13
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 1/4"-20 internal thread size, and a 1/2"-13 external thread size. Supplied as a plain, 10-pack (MPN 217-076534), it meets MS51832-108L standards, is made from 18-8 material, and has a 2A external thread fit and 3B internal thread fit.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is a key locking insert used for?

A key locking insert repairs or reinforces tapped holes in softer materials. The external keys lock the insert into the parent material, preventing rotation under load. This Mil. Spec. version with an Extra Heavy Wall is used in aerospace, defense, and industrial applications requiring high pull-out strength and vibration resistance.

What are the specifications of the APPROVED VENDOR Key Locking Insert?

This insert has a 1/4"-20 internal thread size and a 1/2"-13 external thread size, with an Extra Heavy Wall. It includes 4 keys, is made from 18-8 stainless steel, and meets MS51832-108L standards. The external thread fit is 2A, internal thread fit is 3B, and it is supplied as a plain 10-pack (MPN 217-076534).

Where to buy APPROVED VENDOR Key Locking Inserts worldwide?

3G Electric supplies APPROVED VENDOR Key Locking Inserts to customers 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 the 10-pack (MPN 217-076534) or other Mil. Spec. inserts.

How to install a key locking insert?

Installation requires tapping the hole to the specified external thread size (1/2"-13), then driving the insert into the tapped hole using a compatible installation tool. The keys are set into the parent material with a key-setting tool to lock the insert. Follow the manufacturer's instructions for torque and depth to ensure a secure fit.

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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