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APPROVED VENDOR Key Locking Insert: Extra Heavy Wall, 4 Keys, 5/16"-18 Int Thrd Sz, 9/16"-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, 5/16"-18 Int Thrd Sz, 9/16"-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 PK. It features 4 keys, a 5/16"-18 internal thread size, and a 9/16"-12 external thread size…

SKU 3G-OTH-531739

Brand
APPROVED VENDOR
Item
Key Locking Insert: Extra Heavy Wall, 4 Keys, 5/16"-18 Int Thrd Sz, 9/16"-12 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
Available to Order
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077335
Type
10 PK
Keys
4
Wall Type
Extra Heavy Wall
Ext Thrd Sz
9/16"-12
Finish Type
Plain
Int Thrd Sz
5/16"-18
Thread Type
Coarse
Industry Standards
MS51831-209L
Compatible Tap Size
9/16"-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 PK. It features 4 keys, a 5/16"-18 internal thread size, and a 9/16"-12 external thread size, meeting industry standard MS51831-209L. Made from 18-8 material with a Plain finish, it has a 2A external thread fit and 3B internal thread fit, compatible with a 9/16"-12 tap size.

Frequently Asked Questions

What is an APPROVED VENDOR Key Locking Insert used for?

This Mil. Spec. key-locking insert with an Extra Heavy Wall is used to repair or reinforce tapped threads in metal assemblies, particularly in aerospace and defense applications. The 4 keys lock the insert in place to prevent rotation under vibration, meeting standard MS51831-209L.

What are the specifications of the APPROVED VENDOR Key Locking Insert 217-077335?

This 10-pack insert has a 5/16"-18 internal thread size and a 9/16"-12 external thread size, with an Extra Heavy Wall. It is made from 18-8 stainless steel with a Plain finish, features 4 keys, and meets MS51831-209L. External thread fit is 2A; internal thread fit is 3B.

Where to buy APPROVED VENDOR Key Locking Inserts worldwide?

3G Electric supplies the APPROVED VENDOR Key Locking Insert 217-077335 to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this Mil. Spec. insert to your facility, regardless of location.

How to install an APPROVED VENDOR Key Locking Insert?

Installation requires tapping the hole to the compatible tap size (9/16"-12), then winding the insert onto a driver tool until the keys align with pre-cut slots. After insertion, the keys are staked into the parent material to lock the insert. Follow standard Mil. Spec. installation practices 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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