


Hex Cap Screw, 3/8-16 x 1-In., 100-Pk.
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Hex Cap Screw, 3/8-16 x 1-In., 100-Pk.100 Pack, 3 8x16 Inch x 1", Heat Treated Steel, Coarse Thread, Hex Cap Screw, Grade 5.
Quick Dispatch:
Your Hex Cap Screw, 3/8-16 x 1-In., 100-Pk. orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your Hex Cap Screw, 3/8-16 x 1-In., 100-Pk. ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.4 ★★★★★
Based on 1421 reviews
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Product Reviews
★★★★★ 5
Good quality and price
This fits the original cover that was on my car. Made the removal of the oil filter cap very easy effortless.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 8, 2025
★★★★★ 1
not tight enough
It did slip on my BMW M5 F90 oil filter — it wasn’t tight enough. I had to use a microfiber cloth to fill the gap and make it tighter in order to loosen the oil filter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
★★★★★ 5
Worked Perfectly
Fits the S85 oil filter housing like a glove.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 6, 2026
★★★★★ 5
Works as promised
Size: 2-Pack
Great product! Highly recommend. My check engine light turned off quickly, probably less than 20 minutes after I added the bottle to my tank and started driving. I waited a week to write the review just to make sure the check engine light didn’t turn on again. Success!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
★★★★★ 1
Don't waste your time
Size: 2-Pack
I did it 2 times back to back didn't do anything. Failed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
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