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APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, 9/16"-18 Int Thrd Sz, 13/16"-16 Ext Thrd Sz - Mil. Spec. Key-Locking Inserts
APPROVED VENDORMil. Spec. Key-Locking Inserts

APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, 9/16"-18 Int Thrd Sz, 13/16"-16 Ext Thrd Sz

The APPROVED VENDOR Key Locking Insert is a heavy-wall, mil-spec insert with 4 keys, 9/16"-18 internal thread size, and 13/16"-16 external thread size. It meets MS51831-108L standards, is made from 18-8 stainless…

SKU 3G-OTH-531718

Brand
APPROVED VENDOR
Item
Key Locking Insert: Heavy Wall, 4 Keys, 9/16"-18 Int Thrd Sz, 13/16"-16 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077507
Type
Plain, 10 PK
Keys
4
Wall Type
Heavy Wall
Ext Thrd Sz
13/16"-16
Finish Type
Plain
Int Thrd Sz
9/16"-18
Thread Type
Coarse
Industry Standards
MS51831-108L
Compatible Tap Size
13/16"-16
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 heavy-wall, mil-spec insert with 4 keys, 9/16"-18 internal thread size, and 13/16"-16 external thread size. It meets MS51831-108L standards, is made from 18-8 stainless steel, and comes in a plain finish, 10-pack. This inch-system insert has 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 key locking insert used for?

A key locking insert repairs or reinforces tapped threads in soft materials like aluminum. The external keys lock the insert into the parent material, preventing rotation under vibration or load. This APPROVED VENDOR heavy-wall insert meets MS51831-108L mil-spec standards for demanding industrial applications.

What are the specifications of the APPROVED VENDOR key locking insert?

This heavy-wall insert has a 9/16"-18 internal thread and 13/16"-16 external thread, with 4 keys. It is made from 18-8 stainless steel, plain finish, external thread fit 2A, internal thread fit 3B, and meets MS51831-108L standards. It comes in a 10-pack.

Where to buy APPROVED VENDOR key locking inserts worldwide?

3G Electric supplies APPROVED VENDOR key locking inserts 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 MS51831-108L heavy-wall insert.

How to install a key locking insert?

Installation requires tapping the hole to the specified compatible tap size (13/16"-16 for this insert), then driving the insert into the hole using a key locking insert tool. The keys are then set into the parent material to lock the insert in place. 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.
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High-pressure cleaning — APPROVED VENDOR turbo spray nozzles for pressure washers used in industrial equipment cleaning up to 6,000 psi.
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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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