We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
RFQ CartGet a QuoteSign inSign up
APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, M20-2.50 Int Thrd Sz, M30-2.00 Ext Thrd Sz - Mil. Spec. Key-Locking Inserts
APPROVED VENDORMil. Spec. Key-Locking Inserts

APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, M20-2.50 Int Thrd Sz, M30-2.00 Ext Thrd Sz

The APPROVED VENDOR Key Locking Insert is a heavy-wall, plain-finish Mil. Spec. insert with 4 keys, M20-2.50 internal thread size and M30-2.00 external thread size, supplied in a 10-pack. It meets Fed Std. H28/21 and…

SKU 3G-OTH-531805

Brand
APPROVED VENDOR
Item
Key Locking Insert: Heavy Wall, 4 Keys, M20-2.50 Int Thrd Sz, M30-2.00 Ext Thrd Sz
Category
Mil. Spec. Key-Locking Inserts
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
217-077373
Type
M20-2.50 Int Thrd Sz, M30-2.00 Ext Thrd Sz, Plain, 10 PK
Keys
4
Wall Type
Heavy Wall
Finish Type
Plain
Thread Type
Coarse
Drill Bit Size
28.10 mm
Industry Standards
Fed Std. H28/21, MJ Form
Compatible Tap Size
M30-2.00
External Thread Fit
2A
Internal Thread Fit
3B
External Thread Size
M30-2.00
Material Grade/Class
18-8
System of Measurement
Metric
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

APPROVED VENDOR Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The APPROVED VENDOR Key Locking Insert is a heavy-wall, plain-finish Mil. Spec. insert with 4 keys, M20-2.50 internal thread size and M30-2.00 external thread size, supplied in a 10-pack. It meets Fed Std. H28/21 and MJ Form standards, with a 28.10 mm drill bit size, M30-2.00 compatible tap size, 2A external thread fit, 3B internal thread fit, and is made from 18-8 material in metric coarse thread.

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 heavy-wall key locking insert is used to repair or reinforce tapped threads in metal assemblies, particularly in aerospace and defense applications. It meets Fed Std. H28/21 and MJ Form standards, providing a reliable thread repair solution with 4 locking keys to prevent rotation under vibration.

What are the specifications of the APPROVED VENDOR M20-2.50 key locking insert?

This insert has M20-2.50 internal thread size and M30-2.00 external thread size, with 4 keys, heavy wall, plain finish, and 18-8 material grade. It requires a 28.10 mm drill bit and M30-2.00 tap, with 2A external and 3B internal thread fits. Supplied in a 10-pack.

Where to buy APPROVED VENDOR key locking inserts worldwide?

3G Electric supplies APPROVED VENDOR key locking inserts worldwide, handling full logistics and customs clearance for global delivery. As a sourcing partner, we provide these Mil. Spec. inserts with M20-2.50 internal thread and M30-2.00 external thread, meeting Fed Std. H28/21 standards.

How to install an APPROVED VENDOR heavy-wall key locking insert?

Drill a 28.10 mm hole, tap it to M30-2.00 using a compatible tap, then thread the insert into the hole until it is flush. Use the 4 keys to lock it in place by tapping them into the parent material. Ensure the external thread fit is 2A and internal is 3B for proper engagement.

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from APPROVED VENDOR

View all APPROVED VENDOR parts →
Key Locking Insert: Thin Wall, 4 Keys, M10x1.5 Int Thrd Sz, M14x1.5 Ext Thrd Sz, Plain, Plain, 10 PK (MPN 217-077355). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M14x1.5; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: Fed Std. H28/21, MJ Form; System of Measurement: Metric.
APPROVED VENDOR
Key Locking Insert: Thin Wall, 4 Keys, M10x1.5 Int Thrd Sz, M14x1.5 Ext Thrd Sz, Plain, Plain, 10 PK (MPN 217-077355). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M14x1.5; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: Fed Std. H28/21, MJ Form; System of Measurement: Metric.
Key Locking Insert: Thin Wall, 2 Keys, #4-40 Int Thrd Sz, #10-32 Ext Thrd Sz, Stainless Steel, 10 PK (MPN 217-076284). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: #10-32; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51830-102; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Thin Wall, 2 Keys, #4-40 Int Thrd Sz, #10-32 Ext Thrd Sz, Stainless Steel, 10 PK (MPN 217-076284). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: #10-32; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51830-102; System of Measurement: Inch.
Key Locking Insert: Thin Wall, 4 Keys, M6-1.00 Int Thrd Sz, M10x1.25 Ext Thrd Sz, Plain, 10 PK (MPN 217-076352). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M10x1.25; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: Fed Std. H28/21, MJ Form; System of Measurement: Metric.
APPROVED VENDOR
Key Locking Insert: Thin Wall, 4 Keys, M6-1.00 Int Thrd Sz, M10x1.25 Ext Thrd Sz, Plain, 10 PK (MPN 217-076352). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M10x1.25; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: Fed Std. H28/21, MJ Form; System of Measurement: Metric.
Key Locking Insert: Heavy Wall, 4 Keys, M10x1.25 Int Thrd Sz, M16x1.5 Ext Thrd Sz, Plain, 10 PK (MPN 217-077567). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M16x1.5; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: Fed Std. H28/21, MJ Form; System of Measurement: Metric.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, M10x1.25 Int Thrd Sz, M16x1.5 Ext Thrd Sz, Plain, 10 PK (MPN 217-077567). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M16x1.5; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: Fed Std. H28/21, MJ Form; System of Measurement: Metric.
Key Locking Insert: Heavy Wall, 4 Keys, 5/16"-18 Int Thrd Sz, 1/2"-13 Ext Thrd Sz, Plain, 10 PK (MPN 217-077303). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1/2"-13; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-209; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, 5/16"-18 Int Thrd Sz, 1/2"-13 Ext Thrd Sz, Plain, 10 PK (MPN 217-077303). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1/2"-13; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-209; System of Measurement: Inch.
Key Locking Insert: Extra Heavy Wall, 4 Keys, 3/4"-16 Int Thrd Sz, 1 1/4"-12 Ext Thrd Sz, 10 PK (MPN 217-077541). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1-1/4"-12; Drill Bit Size: 1-11/64 in; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-209L.
APPROVED VENDOR
Key Locking Insert: Extra Heavy Wall, 4 Keys, 3/4"-16 Int Thrd Sz, 1 1/4"-12 Ext Thrd Sz, 10 PK (MPN 217-077541). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1-1/4"-12; Drill Bit Size: 1-11/64 in; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-209L.
Key Locking Insert: Heavy Wall, 4 Keys, 1"-8 Int Thrd Sz, 1 3/8"-12 Ext Thrd Sz, Plain, Plain, 10 PK (MPN 217-076311). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1-3/8"-12; Drill Bit Size: 1-19/64 in; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51831-211.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, 1"-8 Int Thrd Sz, 1 3/8"-12 Ext Thrd Sz, Plain, Plain, 10 PK (MPN 217-076311). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1-3/8"-12; Drill Bit Size: 1-19/64 in; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51831-211.
Key Locking Insert: Heavy Wall, 4 Keys, M6-1.00 Int Thrd Sz, M12x1.25 Ext Thrd Sz, Plain, 10 PK (MPN 217-077365). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M12x1.25; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: Fed Std. H28/21, MJ Form; System of Measurement: Metric.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, M6-1.00 Int Thrd Sz, M12x1.25 Ext Thrd Sz, Plain, 10 PK (MPN 217-077365). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M12x1.25; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: Fed Std. H28/21, MJ Form; System of Measurement: Metric.