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New 1D4539 Cap Screw Replacement suitable for Caterpillar Equipment
- New Cap Screw Replacement suitable for Caterpillar Equipment
- Made to USA Specification
Buy with Confidence: All parts are covered by our warranty
Exact Fit Guarantee
This part is guaranteed to fit your machine.
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Description for 1D4539 Hex Bolt
â–¶Specification for 1D4539 Hex Bolt
â–¶Exact Fit Guarantee for 1D4539 Hex Bolt
â–¶| Dimensions | 2.64x0.51x0.51 |
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The Double Order Catastrophe
My co-worker placed an order and wasn't sure it went through online. I later placed the same order thinking the previous order didn't go through. To my surprise both orders went through, and I needed to cancel one of the orders. I called and spoke with someone who instructed me someone would contact me about the situation. I was contacted by Misty and she said she would do her best to cancel one of the orders but not sure if she could because they were next day orders. A small tome later I received an email saying she was able to cancel one of the orders. Thank you to Misty and the entire Propel Parts Team. Greatly appreciated!! -
:) great service
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They were great to deal with
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Received 15 items within 5 days from placing order !
Great. ! -
I almost want to cry ;( writing this review because I dont want people to find out about them and rather keep them in my pocket but they deserve it…
This company is great with Quality Products at amazing prices! Sometimes, their website is not the most accurate but is user friendly and if you got questions they will call back and are very prompt in responding via a call or text to verify inventory before placing an order.
I really appreciate and look forward to continuing to work with you all especially Anthony — he is amazing & the best!!!
Frequently Asked Questions
What is the 1D4539 cap screw used for?
The 1D4539 cap screw secures components with a precise clamping force applied through its head. It keeps mating parts aligned under load and vibration.
How do I install the 1D4539 cap screw?
Fitting the 1D4539 correctly comes down to clean surfaces and following the manual sequence. Work through these steps:
- Shut the machine down and isolate power before service
- Verify the thread condition on both the 1D4539 and its bore
- Clean the mating surfaces so nothing interferes with seating
- Hand-thread the screw first, then bring it to the initial torque
- Apply the final torque in the sequence given in your manual
- Re-check after the first operating cycle if the manual advises
Which Caterpillar machines is the 1D4539 compatible with?
The 1D4539 is matched to particular Caterpillar equipment, so always verify the application against your parts reference before purchasing. Check your manual or reach out to Propel Parts for help verifying fitment.
Does the 1D4539 cap screw meet performance standards?
Yes. Propel Parts supplies the 1D4539 as a premium aftermarket part made to meet OEM specifications. When replacing, choose genuine or high-quality aftermarket parts that meet or exceed OEM specifications so you can fit it with confidence.
How often should the 1D4539 be replaced?
Replace the 1D4539 whenever the assembly it serves is overhauled, or any time it shows wear, damage, or corrosion. Following the intervals in your service manual is the best guide.
What are the signs of a worn or failing 1D4539 cap screw?
When the 1D4539 reaches the end of its service life, the symptoms tend to show up first as performance or wear issues. Look for:
- A joint that gradually loses torque or works loose
- Damaged, galled, or corroded threads
- Elongation or a thinned, necked shank
- Vibration, movement, or leaks where it clamps
Why is the 1D4539 important, and what related parts work with it?
Replacing the 1D4539 when needed keeps the system within its designed clearances and loads, which extends the life of the surrounding parts and supports dependable performance. Related hardware on our site includes 5D6644 Shim and 2K4973 Nut Self Locking.
Shipping
We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.
We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.
Easy Returns
Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.
Warranty
Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
Exact Fit Guarantee®
The right part — or we'll make it right.
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1 YEAR UNLIMITED WARRANTY
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