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APPROVED VENDOR Key Locking Insert: Thin Wall, 4 Keys, 3/8"-16 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: Thin Wall, 4 Keys, 3/8"-16 Int Thrd Sz, 1/2"-13 Ext Thrd Sz

The APPROVED VENDOR Key Locking Insert is a thin-wall, inch-system Mil. Spec. insert with 4 keys, 3/8"-16 internal thread size, and 1/2"-13 external thread size. It meets MS51831-103 standards, is made from 18-8…

SKU 3G-OTH-531642

Brand
APPROVED VENDOR
Item
Key Locking Insert: Thin Wall, 4 Keys, 3/8"-16 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
217-076324
Type
Plain, Plain, 10 PK
Keys
4
Wall Type
Thin Wall
Ext Thrd Sz
1/2"-13
Finish Type
Plain
Int Thrd Sz
3/8"-16
Thread Type
Coarse
Industry Standards
MS51831-103
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 thin-wall, inch-system Mil. Spec. insert with 4 keys, 3/8"-16 internal thread size, and 1/2"-13 external thread size. It meets MS51831-103 standards, is made from 18-8 material, and comes in a plain finish, 10-pack. External thread fit is 2A; internal thread fit is 3B.

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 thin-wall key locking insert repairs or strengthens threads in metal assemblies, typically in aerospace, defense, or industrial equipment. Its four keys lock it into place, preventing rotation under vibration. The 3/8"-16 internal thread accepts bolts, while the 1/2"-13 external thread installs into a tapped hole.

What are the specifications of the APPROVED VENDOR Key Locking Insert 217-076324?

This inch-system insert has a 3/8"-16 internal thread and 1/2"-13 external thread, with 2A external and 3B internal thread fits. It is made from 18-8 stainless steel, meets MS51831-103 standards, and comes in a plain finish, 10-pack. Wall type is thin, with 4 keys.

Where to buy APPROVED VENDOR Key Locking Inserts worldwide?

3G Electric supplies and delivers APPROVED VENDOR key locking inserts worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to ensure your order reaches any international destination. Contact us for availability and lead time on this MS51831-103 insert.

How to install a thin-wall key locking insert?

Installation requires tapping the hole to the specified 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 four keys deform into the parent material to lock it. Always follow the manufacturer's instructions for torque and depth.

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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