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

E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/8"-11 Int Thrd Sz, 7/8"-9 Ext Thrd Sz - Heavy Wall Self-Locking Inserts
E-Z LOKHeavy Wall Self-Locking Inserts

E-Z LOK Self Locking Thread Insert: Heavy Wall, 5/8"-11 Int Thrd Sz, 7/8"-9 Ext Thrd Sz

The E-Z LOK Self Locking Thread Insert is a heavy-wall, plain-style insert (5-pack) with a 5/8"-11 internal thread size and a 7/8"-9 external thread size, both coarse inch threads. It features a 2A external thread…

SKU 3G-OTH-534192

Also listed as: 30310PK5 · 303 10 PK5

Brand
E-Z LOK
Item
Self Locking Thread Insert: Heavy Wall, 5/8"-11 Int Thrd Sz, 7/8"-9 Ext Thrd Sz
Category
Heavy Wall Self-Locking Inserts
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

E-Z LOK
Manufacturer Part Number
303-10-PK5
Type
Plain, 5 PK
Wall Type
Heavy Wall
Ext Thrd Sz
7/8"-9
Int Thrd Sz
5/8"-11
Thread Type
Coarse
Compatible Tap Size
7/8"-9
External Thread Fit
2A
Internal Thread Fit
2B
System of Measurement
Inch

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

E-Z LOK Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The E-Z LOK Self Locking Thread Insert is a heavy-wall, plain-style insert (5-pack) with a 5/8"-11 internal thread size and a 7/8"-9 external thread size, both coarse inch threads. It features a 2A external thread fit and a 2B internal thread fit, compatible with a 7/8"-9 tap. 3G Electric sources this genuine OEM part (MPN 303-10-PK5) across 14 industrial departments, with specialist expertise in fastening and assembly solutions.

Frequently Asked Questions

What is E-Z LOK Self Locking Thread Insert used for?

E-Z LOK Self Locking Thread Inserts repair or reinforce stripped or worn internal threads in metal assemblies. The heavy-wall design provides maximum pull-out strength for demanding industrial applications such as heavy machinery, automotive, and aerospace maintenance. 3G Electric supplies this genuine OEM part (MPN 303-10-PK5) across 14 industrial departments.

What are the specifications of E-Z LOK 303-10-PK5?

The E-Z LOK 303-10-PK5 is a heavy-wall, plain-style thread insert in a 5-pack. It has a 5/8"-11 internal thread size and a 7/8"-9 external thread size, both coarse inch threads. External thread fit is 2A; internal thread fit is 2B. Compatible tap size is 7/8"-9. System of measurement is inch.

Where to buy E-Z LOK thread inserts in worldwide?

3G Electric sources and delivers genuine E-Z LOK thread inserts worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on the E-Z LOK 303-10-PK5 or other heavy-wall inserts.

How to install E-Z LOK heavy wall thread inserts?

Install E-Z LOK heavy wall thread inserts by tapping the hole to the specified compatible tap size (7/8"-9 for this insert), then driving the insert into the tapped hole using the appropriate installation tool. The self-locking feature secures the insert without adhesives. Always follow the manufacturer's instructions for torque and depth.

E-Z LOK Products

3G Electric supplies E-Z LOK heavy wall self-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

Compatible alternatives & equivalents

Cross-referenced by specification & description
E-Z LOK Self Locking Thread Insert: Heavy Wall, M6-1.00 Int Thrd Sz, 3/8"-16 Ext Thrd Sz, 10 PK (MPN 650-6-PK10)
E-Z LOK
E-Z LOK Self Locking Thread Insert: Heavy Wall, M6-1.00 Int Thrd Sz, 3/8"-16 Ext Thrd Sz, 10 PK (MPN 650-6-PK10)
Press Insert: #6-32 Thread Size, 1/4 in Overall Lg, 13/64 in Dia, Stainless Steel, Plain, 10 PK (MPN 240-006-CR-PK10)
E-Z-LOK
Press Insert: #6-32 Thread Size, 1/4 in Overall Lg, 13/64 in Dia, Stainless Steel, Plain, 10 PK (MPN 240-006-CR-PK10)
OSG Screw Thread Insert STI Tap: Straight Fute, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12604500)
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12604500)
OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-14 UNC, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 6019800)
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-14 UNC, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 6019800)
OSG Screw Thread Insert STI Tap: Thread Forming, 7/16"-14 UNC, H7 / 2B-3B, V Coated Cobalt (MPN 1626003208)
OSG
OSG Screw Thread Insert STI Tap: Thread Forming, 7/16"-14 UNC, H7 / 2B-3B, V Coated Cobalt (MPN 1626003208)
OSG Screw Thread Insert STI Tap: Straight Fute, #8-32 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer (MPN 1810800)
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, #8-32 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer (MPN 1810800)

More from E-Z LOK

View all E-Z LOK parts
E-Z LOK Self Locking Thread Insert: Heavy Wall, M16-2.00 Int Thrd Sz, M24-3.00 Ext Thrd Sz, 5 PK (MPN 450-16-PK5)
E-Z LOK
E-Z LOK Self Locking Thread Insert: Heavy Wall, M16-2.00 Int Thrd Sz, M24-3.00 Ext Thrd Sz, 5 PK (MPN 450-16-PK5)
E-Z LOK Self Locking Thread Insert: Heavy Wall, M12-1.75 Int Thrd Sz, M16-2.00 Ext Thrd Sz, 5 PK (MPN 450-12-PK5)
E-Z LOK
E-Z LOK Self Locking Thread Insert: Heavy Wall, M12-1.75 Int Thrd Sz, M16-2.00 Ext Thrd Sz, 5 PK (MPN 450-12-PK5)
E-Z LOK Self Locking Thread Insert: Heavy Wall, M5-0.80 Int Thrd Sz, M8-1.25 Ext Thrd Sz, 10 PK (MPN 450-5-PK10)
E-Z LOK
E-Z LOK Self Locking Thread Insert: Heavy Wall, M5-0.80 Int Thrd Sz, M8-1.25 Ext Thrd Sz, 10 PK (MPN 450-5-PK10)
E-Z LOK Self Locking Thread Insert: Heavy Wall, M6-1.00 Int Thrd Sz, M10-1.50 Ext Thrd Sz, 5 PK (MPN 453-6-PK5)
E-Z LOK
E-Z LOK Self Locking Thread Insert: Heavy Wall, M6-1.00 Int Thrd Sz, M10-1.50 Ext Thrd Sz, 5 PK (MPN 453-6-PK5)
E-Z LOK Self Locking Thread Insert: Heavy Wall, 3/8"-24 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 5 PK (MPN 303-624-PK5)
E-Z LOK
E-Z LOK Self Locking Thread Insert: Heavy Wall, 3/8"-24 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 5 PK (MPN 303-624-PK5)
E-Z LOK Self Locking Thread Insert: Heavy Wall, M10-1.50 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 5 PK (MPN 653-10-PK5)
E-Z LOK
E-Z LOK Self Locking Thread Insert: Heavy Wall, M10-1.50 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 5 PK (MPN 653-10-PK5)
E-Z LOK Self Locking Thread Insert: Heavy Wall, 7/8"-9 Int Thrd Sz, 1 1/4"-7 Ext Thrd Sz, 5 PK (MPN 329-14-PK5)
E-Z LOK
E-Z LOK Self Locking Thread Insert: Heavy Wall, 7/8"-9 Int Thrd Sz, 1 1/4"-7 Ext Thrd Sz, 5 PK (MPN 329-14-PK5)
E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/4"-20 Int Thrd Sz, M10-1.50 Ext Thrd Sz, 5 PK (MPN 550-1420 -PK5)
E-Z LOK
E-Z LOK Self Locking Thread Insert: Heavy Wall, 1/4"-20 Int Thrd Sz, M10-1.50 Ext Thrd Sz, 5 PK (MPN 550-1420 -PK5)