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APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 3/4"-16 Int Thrd Sz, 1 1/4"-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, 3/4"-16 Int Thrd Sz, 1 1/4"-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-pack (MPN 217-077541). It features 4 keys, a 3/4"-16 internal thread size, a 1 1/4"-12 external…

SKU 3G-OTH-531773

Brand
APPROVED VENDOR
Item
Key Locking Insert: Extra Heavy Wall, 4 Keys, 3/4"-16 Int Thrd Sz, 1 1/4"-12 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077541
Type
10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
1 1/4"-12
Finish Type
Plain
Int Thrd Sz
3/4"-16
Thread Type
Coarse
Drill Bit Size
1-11/64 in
Industry Standards
MS51832-209L
Compatible Tap Size
1-1/4"-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-pack (MPN 217-077541). It features 4 keys, a 3/4"-16 internal thread size, a 1 1/4"-12 external thread size, and a plain finish. The insert is made from 18-8 material, meets industry standard MS51832-209L, and requires a 1-11/64 in drill bit with a compatible tap size of 1-1/4"-12.

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 an APPROVED VENDOR key locking insert used for?

This extra heavy wall key locking insert (MPN 217-077541) repairs or reinforces stripped threads in metal assemblies, meeting Mil. Spec. MS51832-209L. It is used in aerospace, defense, and industrial applications where a permanent, high-strength thread repair is required. The 4 keys lock the insert in place to prevent rotation under load.

What are the specifications of the APPROVED VENDOR key locking insert 217-077541?

This 10-pack insert has a 3/4"-16 internal thread and a 1 1/4"-12 external thread. It features an extra heavy wall, 4 keys, 18-8 material, plain finish, and meets MS51832-209L. Required drill bit size is 1-11/64 in, compatible tap size is 1-1/4"-12, with external thread fit 2A and internal fit 3B.

Where to buy APPROVED VENDOR key locking inserts worldwide?

3G Electric supplies the APPROVED VENDOR key locking insert (MPN 217-077541) 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 this Mil. Spec. thread repair insert.

How to install an extra heavy wall key locking insert?

Drill the hole to 1-11/64 in, tap it to 1-1/4"-12 thread, then screw the insert in using a compatible installation tool. The 4 keys lock into the parent material to prevent rotation. Ensure the insert is flush or slightly below the surface. Use a thread locker if specified by the application.

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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