Mutual Screw & Supply

HOLO-KROME 72382 1-8 X 4" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (10 / Pkg.)

HOLO-KROME 72382 1-8 X 4" Socket Cap Screws | Hex Socket Drive | Alloy Steel - Main image
$94.18 $127.27 In stock

These 1-8 x 4" socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Drive: Socket Drive
  • Thread size: 1-8
  • Length: 4"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Socket Drive
  • Thread size: 1-8
  • Length: 4"
  • Threads per inch: 8
  • Measurement type: Inch
  • Pack quantity: 10 per package
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Ella V. ★★★★★

Threads are clean and the 1-8 pitch grabbed perfectly in my jig fixture—no wobble or cross-threading. For 4-inch alloy steel with that oxide coating, they’re solidly built and the socket drive holds up to a cheater bar without stripping.

Claire ★★★★★

The black oxide finish on these screws is holding up well in my jig setup, no rust after a week of use. Fit perfectly into the pre-tapped holes on my fixture plate. Nice to have a full pack of ten for a fair price.

Victoria F. ★★★★★

I was replacing the cap screws on my milling fixture and these went in with zero binding—the threads are cut clean and the hex socket drive seated perfectly on my Allen wrench. The 4" length was exactly what I needed for this jig setup, and the thermal black oxide gave them a consistent, matte look