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, 3/4"-10 Int Thrd Sz, 1 1/8"-12 Ext Thrd Sz - Mil. Spec. Key-Locking Inserts
APPROVED VENDORMil. Spec. Key-Locking Inserts

APPROVED VENDOR Key Locking Insert: Heavy Wall, 4 Keys, 3/4"-10 Int Thrd Sz, 1 1/8"-12 Ext Thrd Sz

The APPROVED VENDOR Key Locking Insert is a heavy-wall, mil. spec. key-locking insert with 4 keys, a 3/4"-10 internal thread size, and a 1 1/8"-12 external thread size. This plain, 10-pack insert is made from 18-8…

SKU 3G-OTH-531763

Brand
APPROVED VENDOR
Item
Key Locking Insert: Heavy Wall, 4 Keys, 3/4"-10 Int Thrd Sz, 1 1/8"-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
217-077309
Type
Plain, 10 PK
Keys
4
Wall Type
Heavy Wall
Ext Thrd Sz
1 1/8"-12
Finish Type
Plain
Int Thrd Sz
3/4"-10
Thread Type
Coarse
Industry Standards
MS51830-104L
Compatible Tap Size
1-1/8"-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. key-locking insert with 4 keys, a 3/4"-10 internal thread size, and a 1 1/8"-12 external thread size. This plain, 10-pack insert is made from 18-8 material, meets MS51830-104L standards, and features 2A external and 3B internal thread fits.

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 threaded holes in metal assemblies, particularly in military-spec applications. The 4 keys lock the insert in place to prevent rotation under vibration. It meets MS51830-104L standards and is made from 18-8 stainless steel.

What are the specifications of the APPROVED VENDOR 217-077309 key locking insert?

This 10-pack insert has a 3/4"-10 internal thread and a 1 1/8"-12 external thread, with 2A external and 3B internal thread fits. It is a heavy-wall, plain finish type with 4 keys, made from 18-8 material, and meets MS51830-104L standards. Compatible tap size is 1-1/8"-12.

Where to buy APPROVED VENDOR key locking inserts worldwide?

3G Electric supplies APPROVED VENDOR key locking inserts worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source and deliver genuine mil. spec. inserts like the 217-077309 to meet your repair and maintenance needs.

How to install a key locking insert?

Installation requires tapping the hole to the compatible tap size (1-1/8"-12 for this insert), then threading the insert into the tapped hole using a key locking insert tool. The 4 keys are then set 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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from APPROVED VENDOR

View all APPROVED VENDOR parts
Key Locking Insert: Extra Heavy Wall, 4 Keys, 1/2"-20 Int Thrd Sz, 13/16"-16 Ext Thrd Sz, 10 PK (MPN 217-076538). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 13/16"-16; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: NAS1395C3L; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Extra Heavy Wall, 4 Keys, 1/2"-20 Int Thrd Sz, 13/16"-16 Ext Thrd Sz, 10 PK (MPN 217-076538). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 13/16"-16; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: NAS1395C3L; System of Measurement: Inch.
Key Locking Insert: Extra Heavy Wall, 4 Keys, 3/8"-16 Int Thrd Sz, 5/8"-11 Ext Thrd Sz, Plain, 10 PK (MPN 217-076336). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 5/8"-11; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51830-109L; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Extra Heavy Wall, 4 Keys, 3/8"-16 Int Thrd Sz, 5/8"-11 Ext Thrd Sz, Plain, 10 PK (MPN 217-076336). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 5/8"-11; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51830-109L; System of Measurement: Inch.
Key Locking Insert: Heavy Wall, 4 Keys, 9/16"-18 Int Thrd Sz, 13/16"-16 Ext Thrd Sz, Plain, 10 PK (MPN 217-076507). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 13/16"-16; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-201; System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, 9/16"-18 Int Thrd Sz, 13/16"-16 Ext Thrd Sz, Plain, 10 PK (MPN 217-076507). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 13/16"-16; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 18-8; Industry Standards: MS51832-201; System of Measurement: Inch.
Key Locking Insert: Heavy Wall, 4 Keys, M5x0.8 Int Thrd Sz, M10x1.25 Ext Thrd Sz, Plain, 10 PK (MPN 217-077364). Key specifications — Wall Type: Heavy 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: Heavy Wall, 4 Keys, M5x0.8 Int Thrd Sz, M10x1.25 Ext Thrd Sz, Plain, 10 PK (MPN 217-077364). Key specifications — Wall Type: Heavy 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: Extra Heavy Wall, 2 Keys, #6-32 Int Thrd Sz, 5/16"-18 Ext Thrd Sz, Plain, 10 PK (MPN 217-076331). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 5/16"-18; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 303; Industry Standards: MIL-I-45914A (MS51832); System of Measurement: Inch.
APPROVED VENDOR
Key Locking Insert: Extra Heavy Wall, 2 Keys, #6-32 Int Thrd Sz, 5/16"-18 Ext Thrd Sz, Plain, 10 PK (MPN 217-076331). Key specifications — Wall Type: Extra Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: 5/16"-18; External Thread Fit: 2A; Internal Thread Fit: 3B; Material Grade/Class: 303; Industry Standards: MIL-I-45914A (MS51832); System of Measurement: Inch.
Key Locking Insert: Heavy Wall, 4 Keys, M24-2.00 Int Thrd Sz, M33-2.00 Ext Thrd Sz, Plain, 10 PK (MPN 217-076575). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M33-2.00; Drill Bit Size: 31.10 mm; External Thread Fit: 2A; External Thread Size: M33-2.00; Internal Thread Fit: 3B; Material Grade/Class: 18-8.
APPROVED VENDOR
Key Locking Insert: Heavy Wall, 4 Keys, M24-2.00 Int Thrd Sz, M33-2.00 Ext Thrd Sz, Plain, 10 PK (MPN 217-076575). Key specifications — Wall Type: Heavy Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M33-2.00; Drill Bit Size: 31.10 mm; External Thread Fit: 2A; External Thread Size: M33-2.00; Internal Thread Fit: 3B; Material Grade/Class: 18-8.
Key Locking Insert: Thin Wall, 2 Keys, M2-0.40 Int Thrd Sz, M4-0.70 Ext Thrd Sz, Plain, Plain, 10 PK (MPN 217-076382). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M4-0.70; 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, 2 Keys, M2-0.40 Int Thrd Sz, M4-0.70 Ext Thrd Sz, Plain, Plain, 10 PK (MPN 217-076382). Key specifications — Wall Type: Thin Wall; Brand: APPROVED VENDOR; Compatible Tap Size: M4-0.70; 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 217-077284). 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: MS51830-106; 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 217-077284). 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: MS51830-106; System of Measurement: Inch.