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APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 5/8"-18 Int Thrd Sz, 1"-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, 5/8"-18 Int Thrd Sz, 1"-12 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 5/8"-18 internal thread size, and a 1"-12 external thread size. Supplied in a Plain finish, 10…

SKU 3G-OTH-531797

Brand
APPROVED VENDOR
Item
Key Locking Insert: Extra Heavy Wall, 4 Keys, 5/8"-18 Int Thrd Sz, 1"-12 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-076540
Type
Plain, 10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
1"-12
Finish Type
Plain
Int Thrd Sz
5/8"-18
Thread Type
Coarse
Industry Standards
MS51831-203L
Compatible Tap Size
1"-12
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, featuring 4 keys, a 5/8"-18 internal thread size, and a 1"-12 external thread size. Supplied in a Plain finish, 10 PK, this 18-8 material insert meets MS51831-203L standards with external thread fit 2A and internal thread fit 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 a Mil. Spec. key-locking insert used for?

A Mil. Spec. key-locking insert like the APPROVED VENDOR Extra Heavy Wall type is used to repair or reinforce threaded holes in metal assemblies, particularly in aerospace, defense, and industrial equipment where vibration resistance and high pull-out strength are required.

What are the specifications of the APPROVED VENDOR key-locking insert 217-076540?

This insert has an Extra Heavy Wall, 4 keys, 5/8"-18 internal thread, 1"-12 external thread, Plain finish, 18-8 material, and meets MS51831-203L. External thread fit is 2A, internal thread fit is 3B. Supplied in a 10 PK. Compatible tap size is 1"-12.

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 site. Contact us for pricing and lead time on this MS51831-203L insert in 10 PK quantities.

How to install a key-locking insert?

Installation requires drilling to the specified tap size (1"-12 for this insert), tapping the hole, then driving the insert using a key-locking insert tool. The keys lock into the parent material to prevent rotation. Follow the manufacturer's torque and depth guidelines for best results.

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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