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

JW WINCO 7-Arm Knob with Threaded Hole, Cast Iron, 1.26 in Dia, 1/4"-20 Thread - 7-Arm Knobs with Threaded Hole
JW WINCO7-Arm Knobs with Threaded Hole

JW WINCO 7-Arm Knob with Threaded Hole, Cast Iron, 1.26 in Dia, 1/4"-20 Thread

The JW WINCO Cast Iron Hand Knob is a 7-arm knob with a threaded hole, featuring a 1.26 in diameter, 1/4"-20 thread, and 0.47 in thread length. Made from cast iron, this 7-point knob (MPN 3TC77/E) provides a manual…

SKU 3G-OTH-524840

Also listed as: 3TC77E · 3TC77 E · 3TC77-E

Brand
JW WINCO
Item
7-Arm Knob with Threaded Hole, Cast Iron, 1.26 in Dia, 1/4"-20 Thread
Category
7-Arm Knobs with Threaded Hole
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

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

JW WINCO
Manufacturer Part Number
3TC77/E
Type
Cast Iron
Dia
1.26 in
Thread
1/4"-20
Thread Lg
0.47 in

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

JW WINCO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The JW WINCO Cast Iron Hand Knob is a 7-arm knob with a threaded hole, featuring a 1.26 in diameter, 1/4"-20 thread, and 0.47 in thread length. Made from cast iron, this 7-point knob (MPN 3TC77/E) provides a manual grip interface for industrial equipment adjustments.

Frequently Asked Questions

What is a JW WINCO cast iron hand knob used for?

A JW WINCO cast iron hand knob provides a manual grip interface for adjusting industrial equipment. Its 7-arm design and 1/4"-20 threaded hole allow secure hand-tightening on machinery, fixtures, or jigs where tool-free adjustments are needed.

What are the specifications of the JW WINCO 3TC77/E hand knob?

The JW WINCO 3TC77/E is a 7-point cast iron hand knob with a 1.26 in diameter, 1/4"-20 thread, and 0.47 in thread length. It is made from cast iron and features a threaded hole for mounting on studs or bolts.

Where to buy JW WINCO hand knobs worldwide?

3G Electric supplies JW WINCO cast iron hand knobs worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on the 3TC77/E or other JW WINCO parts.

How to install a JW WINCO cast iron hand knob?

To install a JW WINCO cast iron hand knob, thread it onto a matching 1/4"-20 stud or bolt until hand-tight. Avoid over-torquing to prevent damage to the cast iron. For permanent applications, use a thread-locking compound. Always verify thread compatibility before installation.

Used in

Common applications for JW WINCO
Machinery assembly — JW WINCO self-locking bearing locknuts (e.g., 1804.1-M50X1.5) for securing bearings on shafts in gearboxes and conveyors.
Fixture building — JW WINCO horizontal U-latch toggle clamps (e.g., 851.3-700-T6) for quick clamping in welding jigs and assembly fixtures.
Material handling — JW WINCO quick-release hoist rings (e.g., 1135-M12-17-ST) for lifting heavy components in manufacturing cells.
Shaft positioning — JW WINCO one-piece shaft collars (e.g., 5WG46/A) for retaining bearings or acting as stops on linear motion systems.
Linkage systems — JW WINCO stainless steel clevis rod ends (e.g., 8NXBIS) for connecting pneumatic cylinders or actuators in automated equipment.
Clamping arm extension — JW WINCO rigid clamping arm extenders (e.g., 801.1-85-16-ST) for increasing reach on toggle clamps in custom fixtures.

JW WINCO Products

3G Electric supplies JW WINCO 7-arm knobs with threaded hole. 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 JW WINCO

View all JW WINCO parts
This 7-arm knob features a plastic body with a stainless steel M6 threaded insert and a 12 mm thread length. The 7-point star design provides a manual grip interface for adjustment, clamping, and positioning tasks in industrial equipment
JW WINCO
This 7-arm knob features a plastic body with a stainless steel M6 threaded insert and a 12 mm thread length. The 7-point star design provides a manual grip interface for adjustment, clamping, and positioning tasks in industrial equipment
This 7-arm knob features a plastic body with a steel M12 threaded insert and a 22 mm thread length. The 7-point star design provides a secure grip for manual adjustment and clamping on industrial machinery, jigs, and fixtures
JW WINCO
This 7-arm knob features a plastic body with a steel M12 threaded insert and a 22 mm thread length. The 7-point star design provides a secure grip for manual adjustment and clamping on industrial machinery, jigs, and fixtures
This 7-arm knob features a plastic body with a stainless steel threaded insert. The 1/2"-13 thread allows for manual adjustment and clamping in industrial machinery, jigs, and fixtures. Suitable for frequent repositioning in assembly, packaging, and material handling equipment
JW WINCO
This 7-arm knob features a plastic body with a stainless steel threaded insert. The 1/2"-13 thread allows for manual adjustment and clamping in industrial machinery, jigs, and fixtures. Suitable for frequent repositioning in assembly, packaging, and material handling equipment
This 7-arm star knob features a plastic body with a steel M10 threaded insert and an 18 mm thread length. The 7-point design provides a secure grip for manual adjustment and clamping applications on machinery, fixtures, and equipment requiring frequent repositioning without tools
JW WINCO
This 7-arm star knob features a plastic body with a steel M10 threaded insert and an 18 mm thread length. The 7-point design provides a secure grip for manual adjustment and clamping applications on machinery, fixtures, and equipment requiring frequent repositioning without tools
Plastic knob with steel thread insert, M10 thread size, 18 mm thread length. Seven-point star design provides multiple grip points for manual adjustment and clamping on machinery, jigs, and fixtures without tools
JW WINCO
Plastic knob with steel thread insert, M10 thread size, 18 mm thread length. Seven-point star design provides multiple grip points for manual adjustment and clamping on machinery, jigs, and fixtures without tools
This 7-arm knob features a 63 mm diameter and an M12 steel thread. The knob body is plastic with a steel threaded insert. It is used for manual adjustment and clamping in machinery, jigs, and fixtures where frequent hand tightening is required
JW WINCO
This 7-arm knob features a 63 mm diameter and an M12 steel thread. The knob body is plastic with a steel threaded insert. It is used for manual adjustment and clamping in machinery, jigs, and fixtures where frequent hand tightening is required
This 7-point star knob features a plastic body with a steel M6 threaded insert and a 12 mm thread length. Designed for manual adjustment and clamping applications where a secure, ergonomic grip is required. Suitable for use in jigs, fixtures, and machinery for hand-tightening tasks
JW WINCO
This 7-point star knob features a plastic body with a steel M6 threaded insert and a 12 mm thread length. Designed for manual adjustment and clamping applications where a secure, ergonomic grip is required. Suitable for use in jigs, fixtures, and machinery for hand-tightening tasks
This 7-arm knob features a plastic body with a steel threaded insert, M12 thread, and 63 mm diameter. It is used for manual adjustment, clamping, and positioning on industrial machinery
JW WINCO
This 7-arm knob features a plastic body with a steel threaded insert, M12 thread, and 63 mm diameter. It is used for manual adjustment, clamping, and positioning on industrial machinery