3/8-16 X 1-1/4" Flat Head Cap Screws | Nylon Patch | Alloy Steel Thermal Black Oxide (100 / Pkg.)

Mutual ScrewSKU: 3720CSFPBB

Price:
Sale price$137.29per 100( $1.37 each)
Pieces 100
Measurement type Inch
Thread size 3/8-16
Length 1-1/4
Material Alloy Steel
Finish Thermal Black Oxide
Drive Hex Socket
Head style Flat
Thread style Fully Threaded
Weight 3.98 lb

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

Description

Cap Screws Flat Socket Nylon Patch Alloy Thermal Black Oxide 3/8-16 x 1 1/4 delivers high-strength fastening with a practical nylon patch and a durable thermal black oxide finish for a secure, long-lasting hold in demanding environments.

Key Features

Flat Socket Head provides a recessed, flush profile for a clean finish in tight or visible spaces while allowing easy tool access.

Nylon Patch adds protective cushioning and wear resistance at the interface, helping to reduce surface damage during assembly.

Alloy Construction combines strength and lightweight properties, making these cap screws suitable for demanding mechanical and automotive applications.

Thermal Black Oxide Finish offers improved wear resistance and a low-glare appearance with mild corrosion resistance, ideal for both functional and aesthetic requirements.

Size and Fit: Thread 3/8-16, Length 1 1/4 in. The flat socket head accepts standard hex keys or sockets for versatile installation across projects.

Specifications

Thread size: 3/8-16 • Length: 1 1/4 in • Head style: Flat Socket Cap Screw • Finish: Thermal Black Oxide • Material: Alloy • Patch: Nylon

Applications

Ideal for automotive, machinery, equipment assemblies, and industrial settings where secure fasteners with surface protection are beneficial. Suitable for torque-controlled installations requiring a flush, low-profile fastener.

Can We Help?

If you’re not sure that this product is right for you, give us a call!
800-222-0324

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