Screw 3/8in-16 x 4in Multiple applications
- Durable zinc phosphate coated steel construction
- Direct replacement for OE part 8S9191
- Multiple Use Engine Application
- Genuine PAI product including a factory 2-Year Warranty
- Quality You Can Trust - PAI has established themselves as the leading supplier of aftermarket heavy duty diesel parts, with quality standards that always meet or exceed OE standards
Features
- DETAIL - PAI hardware and fasteners are carefullly designed and feature very low tolerances. Fastener specifications are measured in a 3D environment and tested to ensure the 100% functionality.
- STRENGTH - PAI hardware is made of industry leading materials and processes. Our hardware and fasteners are rigorously tested in heavy duty diesel engines and high stress work environments to certify proper and continuous operation over long periods of time.
- VARIETY - PAI is a market leader of heavy-duty diesel truck parts, and our hardware and fasteners are no exception. We have been manufacturing and expanding our product offerings since 1973. If there is a part you need, and we do not have it, there is a good chance we are working diligently to make it.
- UPC:
- 193807189389
- Mfr Part Number:
- 340040
- Bolt Type:
- Hex Head Screw
- Drive Type:
- External Flanged Hex
- Fully Threaded:
- No
- Length (inches):
- 4
- Material:
- Steel
- Tensile Strength Grade / Class:
- 8
- Thread Size:
- 3/8-16
We're currently collecting product reviews for this item. In the meantime, here are some reviews from our past customers sharing their overall shopping experience.
4.8
Out of 5.0

Overall Rating
97%
of customers that buyfrom this merchant give
them a 4 or 5-Star rating.
April 14, 2025 by Angel S. (United States)
“Good”
Company Choice
Because I looked it up on the internet
Product Choice
Because it is original
April 14, 2025 by Osvaldo M. (CO, United States)
“Thank you”
April 11, 2025 by David H. (United States)
“fast and convenient”
Company Choice
had what I needed
Product Choice
direct replacement