Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, M12x1.75 Int Thrd Sz, M18-1.50 Ext Thrd Sz - Mil. Spec. Key-Locking Inserts
APPROVED VENDORMil. Spec. Key-Locking Inserts

APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, M12x1.75 Int Thrd Sz, M18-1.50 Ext Thrd Sz

The APPROVED VENDOR Key Locking Insert is a Mil. Spec. heavy-wall insert with 4 keys, M12x1.75 internal thread and M18-1.50 external thread, plain finish, in a 10-pack. It meets Fed Std. H28/21 and MJ Form standards…

SKU 3G-OTH-531706

Brand
APPROVED VENDOR
Item
Key Locking Insert: Heavy Wall, 4 Keys, M12x1.75 Int Thrd Sz, M18-1.50 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
217-076369
Type
M12x1.75 Int Thrd Sz, M18-1.50 Ext Thrd Sz, Plain, 10 PK
Keys
4
Wall Type
Heavy Wall
Finish Type
Plain
Thread Type
Coarse
Drill Bit Size
16.70 mm
Industry Standards
Fed Std. H28/21, MJ Form
Compatible Tap Size
M18-1.50
External Thread Fit
2A
Internal Thread Fit
3B
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 Mil. Spec. heavy-wall insert with 4 keys, M12x1.75 internal thread and M18-1.50 external thread, plain finish, in a 10-pack. It meets Fed Std. H28/21 and MJ Form standards, with 18-8 material, 16.70 mm drill bit size, M18-1.50 compatible tap, and thread fits of 2A external and 3B internal.

Frequently Asked Questions

Is the APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, M12x1.75 Int Thrd Sz, M18-1.50 Ext Thrd Sz available from 3G Electric?

Yes — 3G Electric supplies genuine APPROVED VENDOR products, available to order with worldwide shipping. Contact us for current lead time.

How do I get a quote for the APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, M12x1.75 Int Thrd Sz, M18-1.50 Ext Thrd Sz?

Click "Request a Quote" on this page or add the product to your RFQ cart. Our engineers will respond within 24 hours with pricing, lead times, and technical recommendations.

Does 3G Electric provide technical support for mil. spec. key-locking inserts?

Yes, our team of experienced engineers provides full technical support including product selection, installation guidance, commissioning, and after-sales service for all mil. spec. key-locking inserts we distribute.

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: Heavy Wall, 4 Keys, 1/4"-20 Int Thrd Sz, 7/16"-14 Ext Thrd Sz, Plain, 10 PK (MPN 217-077302). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 7/16"-14; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-208; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, 1/4"-20 Int Thrd Sz, 7/16"-14 Ext Thrd Sz, Plain, 10 PK (MPN 217-077302). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 7/16"-14; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-208; System of Measurement: Inch.
Key Locking Insert: Extra Heavy Wall, 4 Keys, 5/8"-18 Int Thrd Sz, 1"-12 Ext Thrd Sz, Plain, 10 PK (MPN 217-077540). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1"-12; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-208L; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Extra Heavy Wall, 4 Keys, 5/8"-18 Int Thrd Sz, 1"-12 Ext Thrd Sz, Plain, 10 PK (MPN 217-077540). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1"-12; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-208L; System of Measurement: Inch.
Key Locking Insert: Heavy Wall, 4 Keys, 1/2"-20 Int Thrd Sz, 11/16"-11 Ext Thrd Sz, Plain, 10 PK (MPN 217-076506). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 11/16"-11; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51830-206; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, 1/2"-20 Int Thrd Sz, 11/16"-11 Ext Thrd Sz, Plain, 10 PK (MPN 217-076506). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 11/16"-11; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51830-206; System of Measurement: Inch.
Key Locking Insert: Thin Wall, 2 Keys, #2-56 Int Thrd Sz, #6-40 Ext Thrd Sz, Stainless Steel, 10 PK (MPN 217-076282). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: #6-40; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 303; Industry Standards: MIL-I-45914A (MS51830); System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Thin Wall, 2 Keys, #2-56 Int Thrd Sz, #6-40 Ext Thrd Sz, Stainless Steel, 10 PK (MPN 217-076282). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: #6-40; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 303; Industry Standards: MIL-I-45914A (MS51830); System of Measurement: Inch.
Key Locking Insert: Heavy Wall, 4 Keys, 3/8"-24 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, Plain, 10 PK (MPN 217-077504). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 9/16"-12; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51831-105L; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, 3/8"-24 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, Plain, 10 PK (MPN 217-077504). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 9/16"-12; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51831-105L; System of Measurement: Inch.
Key Locking Insert: Heavy Wall, 2 Keys, #6-32 Int Thrd Sz, 1/4"-20 Ext Thrd Sz, Plain, Plain, 10 PK (MPN 217-076291). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1/4"-20; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 303; Industry Standards: MIL-I-45914A (MS51831); System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 2 Keys, #6-32 Int Thrd Sz, 1/4"-20 Ext Thrd Sz, Plain, Plain, 10 PK (MPN 217-076291). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 1/4"-20; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 303; Industry Standards: MIL-I-45914A (MS51831); System of Measurement: Inch.
Key Locking Insert: Thin Wall, 4 Keys, 5/16"-18 Int Thrd Sz, 7/16"-14 Ext Thrd Sz, Plain, 10 PK (MPN 217-076323). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 7/16"-14; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51831-102; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Thin Wall, 4 Keys, 5/16"-18 Int Thrd Sz, 7/16"-14 Ext Thrd Sz, Plain, 10 PK (MPN 217-076323). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 7/16"-14; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51831-102; System of Measurement: Inch.
Key Locking Insert: Heavy Wall, 4 Keys, M10x1.5 Int Thrd Sz, M16x1.5 Ext Thrd Sz, Plain, 10 PK (MPN 217-076367). 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, M10x1.5 Int Thrd Sz, M16x1.5 Ext Thrd Sz, Plain, 10 PK (MPN 217-076367). 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.