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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 in a plain finish…

SKU 3G-OTH-531634

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
217-077334
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
MS51831-208L
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 in a plain finish, 10-pack, this inch-system insert meets MS51831-208L standards, with 18-8 material, 2A external thread fit, and 3B internal thread fit.

Frequently Asked Questions

What is an APPROVED VENDOR Key Locking Insert used for?

This Mil. Spec. key-locking insert with extra heavy wall is used to repair or reinforce tapped threads in metal assemblies, particularly in aerospace, defense, and industrial equipment. The 4 keys lock the insert in place, preventing rotation under vibration. 3G Electric supplies this insert worldwide for critical thread-repair applications.

What are the specifications of the APPROVED VENDOR Key Locking Insert 217-077334?

This 10-pack insert has a 1/4\"-20 internal thread and 1/2\"-13 external thread, with 2A external and 3B internal thread fits. It is made of 18-8 stainless steel, plain finish, extra heavy wall, and meets MS51831-208L standards. Compatible tap size is 1/2\"-13. 3G Electric provides this inch-system insert.

Where to buy APPROVED VENDOR Key Locking Inserts worldwide?

3G Electric supplies the APPROVED VENDOR Key Locking Insert 217-077334 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. insert.

How to install an APPROVED VENDOR Key Locking Insert?

Installation requires tapping the hole to the compatible tap size (1/2\"-13), then driving the insert using a key-locking insert tool until it is flush or slightly below the surface. The 4 keys are then set into the parent material to lock the insert. 3G Electric can advise on tooling and best practices.

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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