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APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 9/16"-12 Int Thrd Sz, 7/8"-14 Ext Thrd Sz - Mil. Spec. Key-Locking Inserts
APPROVED VENDORMil. Spec. Key-Locking Inserts

APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 9/16"-12 Int Thrd Sz, 7/8"-14 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 9/16"-12 internal thread size, a 7/8"-14 external thread size, and meets…

SKU 3G-OTH-531771

Brand
APPROVED VENDOR
Item
Key Locking Insert: Extra Heavy Wall, 4 Keys, 9/16"-12 Int Thrd Sz, 7/8"-14 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
Available to Order
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077339
Type
10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
7/8"-14
Finish Type
Plain
Int Thrd Sz
9/16"-12
Thread Type
Coarse
Industry Standards
NAS1394C4L
Compatible Tap Size
7/8"-14
External Thread Fit
2A
Internal Thread Fit
3B
Material Grade/Class
18-8
System of Measurement
Inch
View Full Spec Sheet

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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 9/16"-12 internal thread size, a 7/8"-14 external thread size, and meets NAS1394C4L standards. Made from 18-8 material with a Plain finish, it has an external thread fit of 2A and internal thread fit of 3B, compatible with a 7/8"-14 tap size.

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 like aluminum. The external keys lock the insert in place, preventing rotation under vibration. This APPROVED VENDOR Extra Heavy Wall version meets NAS1394C4L standards for aerospace and defense applications.

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

This insert has a 9/16"-12 internal thread and 7/8"-14 external thread, with an Extra Heavy Wall and 4 keys. It is made from 18-8 stainless steel with a Plain finish, external thread fit 2A, internal thread fit 3B, and meets NAS1394C4L. Supplied in a 10 PK.

Where to buy APPROVED VENDOR key locking inserts worldwide?

3G Electric supplies APPROVED VENDOR key locking inserts worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this NAS1394C4L-compliant 10 PK insert.

How to install a key locking insert?

Installation requires tapping the hole to the specified external thread size (7/8"-14), then winding the insert in using a compatible installation tool. The 4 keys are set after insertion to lock it in place. 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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