We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
RFQ CartGet a QuoteSign inSign up
APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, 3/8"-24 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: Heavy Wall, 4 Keys, 3/8"-24 Int Thrd Sz, 9/16"-12 Ext Thrd Sz

The APPROVED VENDOR Key Locking Insert is a heavy-wall, mil-spec insert with 4 keys, 3/8"-24 internal thread size, and 9/16"-12 external thread size. It meets NAS1394C6 standards, is made from 18-8 material, and…

SKU 3G-OTH-531646

Brand
APPROVED VENDOR
Item
Key Locking Insert: Heavy Wall, 4 Keys, 3/8"-24 Int Thrd Sz, 9/16"-12 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
217-076504
Type
Plain, 10 PK
Keys
4
Wall Type
Heavy Wall
Ext Thrd Sz
9/16"-12
Finish Type
Plain
Int Thrd Sz
3/8"-24
Thread Type
Coarse
Industry Standards
NAS1394C6
Compatible Tap Size
9/16"-12
External Thread Fit
2A
Internal Thread Fit
3B
Material Grade/Class
18-8
System of Measurement
Inch
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, mil-spec insert with 4 keys, 3/8"-24 internal thread size, and 9/16"-12 external thread size. It meets NAS1394C6 standards, is made from 18-8 material, and comes in a plain finish, 10 PK.

Frequently Asked Questions

What is a key locking insert used for?

A key locking insert repairs or reinforces threads in soft materials like aluminum. The APPROVED VENDOR heavy-wall insert with 4 keys provides a permanent, high-strength thread for demanding industrial applications, meeting NAS1394C6 standards.

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

This heavy-wall insert has a 3/8"-24 internal thread and 9/16"-12 external thread, with 4 keys. It is made from 18-8 stainless steel, meets NAS1394C6 standards, and comes in a plain finish, 10 PK. External thread fit is 2A; internal is 3B.

Where to buy APPROVED VENDOR key locking inserts worldwide?

3G Electric supplies the APPROVED VENDOR key locking insert (MPN 217-076504) worldwide. We handle full logistics, customs clearance, and delivery to your facility, ensuring you get the correct mil-spec insert for your application.

How to install a key locking insert?

Installation requires drilling to the compatible tap size (9/16"-12), tapping the hole, then driving the insert using a key locking insert tool. The 4 keys lock into the parent material for a permanent, vibration-resistant thread. Follow standard mil-spec procedures.

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: Heavy Wall, 4 Keys, M20-2.50 Int Thrd Sz, M30-2.00 Ext Thrd Sz, Plain, 10 PK (MPN 217-077373). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M30-2.00; Drill Bit Size: 28.10 mm; External Thread Fit: 2A; External Thread Size: M30-2.00; Internal Thread Fit: 3B; Material Grade/Class: 18-8.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, M20-2.50 Int Thrd Sz, M30-2.00 Ext Thrd Sz, Plain, 10 PK (MPN 217-077373). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M30-2.00; Drill Bit Size: 28.10 mm; External Thread Fit: 2A; External Thread Size: M30-2.00; Internal Thread Fit: 3B; Material Grade/Class: 18-8.
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.