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3G Electric
PROTO J503/8 Hexagon Flat SAE Pin Loosening Punch - Pin Loosening Punches
PROTOPin Loosening Punches

PROTO J503/8 Hexagon Flat SAE Pin Loosening Punch

The PROTO Starting Punch (SKU J503/8, MPN J503/8) is a pin loosening punch with a 3/16 in tip diameter, 3/8 in shank width, and 5 3/4 in overall length. It features a hexagon, flat, SAE design for industrial striking…

SKU 3G-OTH-735380

Also listed as: J5038 · J503 8 · J503-8

Brand
PROTO
Item
J503/8 Hexagon Flat SAE Pin Loosening Punch
Part Number
J503/8
Category
Pin Loosening Punches
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Technical Specifications

PROTO
Manufacturer Part Number
J503/8
Type
Hexagon, Flat, SAE
Overall Lg
5 3/4 in
Shank Wd
3/8 in

Technical Documents

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

Product Description

The PROTO Starting Punch (SKU J503/8, MPN J503/8) is a pin loosening punch with a 3/16 in tip diameter, 3/8 in shank width, and 5 3/4 in overall length. It features a hexagon, flat, SAE design for industrial striking applications.

Frequently Asked Questions

What is a PROTO starting punch used for?

A PROTO starting punch is used to initially drive out pins, dowels, and rivets in industrial maintenance and assembly. Its flat, hexagon SAE design provides a stable striking surface for precise alignment before using a pin punch. 3G Electric supplies this tool across 14 industrial departments.

What are the specifications of the PROTO J503/8 starting punch?

The PROTO J503/8 starting punch has a 3/16 in tip diameter, 3/8 in shank width, and 5 3/4 in overall length. It features a hexagon, flat, SAE design. This pin loosening punch is made by PROTO and is suitable for industrial striking applications.

Where to buy a PROTO starting punch worldwide?

3G Electric supplies the PROTO starting punch (SKU 3G-OTH-735380) to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine PROTO tools and support your procurement needs across multiple departments.

How to select the right starting punch for industrial use?

Select a starting punch with a tip diameter slightly smaller than the pin you are driving. The PROTO J503/8 has a 3/16 in tip and 3/8 in shank for general use. Ensure the shank width matches your hammer face to avoid damage. 3G Electric can help you choose the correct PROTO punch for your application.

Used in

Common applications for PROTO
Industrial maintenance — PROTO J6014CXCERT micrometer torque wrench for tightening fasteners to 50–250 ft-lb with tether capability.
Assembly operations — PROTO J6345A electronic torque wrench for 5–50 ft-lb control with audible and visual indicators.
Plumbing and mechanical — PROTO J812HD straight pipe wrench with 2 in jaw capacity for gripping and turning pipes.
Precision fastening — PROTO J61929 multi-bit screw and nut driver kit with 26 alloy steel bits for assembly and maintenance.
Tool organization — PROTO JUC3743-3SG heavy-duty utility cart with drawers, power strip, and padlock for shop floor use.
Metric fastener service — PROTO JSCVM-20SB 20-piece ratcheting combination wrench set covering 6 mm to 32 mm.
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PROTO Products

3G Electric supplies PROTO pin loosening punches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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