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APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 9/16"-18 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"-18 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"-18 internal thread size, a 7/8"-14 external thread size, and a…

SKU 3G-OTH-531663

Brand
APPROVED VENDOR
Item
Key Locking Insert: Extra Heavy Wall, 4 Keys, 9/16"-18 Int Thrd Sz, 7/8"-14 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077539
Type
10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
7/8"-14
Finish Type
Plain
Int Thrd Sz
9/16"-18
Thread Type
Coarse
Industry Standards
MS51832-207L
Compatible Tap Size
7/8"-14
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 9/16"-18 internal thread size, a 7/8"-14 external thread size, and a plain finish. Made from 18-8 material with a coarse thread type, it meets industry standard MS51832-207L and is compatible with a 7/8"-14 tap size, with external thread fit 2A and internal thread fit 3B.

Frequently Asked Questions

What is an APPROVED VENDOR Key Locking Insert used for?

This Mil. Spec. key-locking insert repairs or strengthens threads in metal assemblies, typically in aerospace, defense, and industrial equipment. The extra heavy wall and 4 keys provide high pull-out resistance. 3G Electric supplies this insert across 14 industrial departments, including machining and instrumentation.

What are the specifications of the APPROVED VENDOR Key Locking Insert 217-077539?

This insert has a 9/16"-18 internal thread and 7/8"-14 external thread, with an extra heavy wall and 4 keys. It meets MS51832-207L, is made from 18-8 stainless steel, and has a plain finish. External thread fit is 2A; internal thread fit is 3B. Supplied in a 10-pack.

Where to buy APPROVED VENDOR Key Locking Inserts worldwide?

3G Electric supplies APPROVED VENDOR key locking inserts to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine parts across 14 departments, including fasteners and machining, ensuring you get the right Mil. Spec. insert.

How to install an APPROVED VENDOR Key Locking Insert?

Installation requires a compatible tap (7/8"-14), a key-locking insert driver, and a tang break-off tool. Thread the insert into the tapped hole until it sits slightly below the surface, then drive the keys into the parent material using the key-locking tool. Break off the tang for a flush finish. Always follow MS51832-207L guidelines.

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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