Bulk 1/4"-28 Socket Head Cap Screws – Alloy Steel, Black Oxide – USA Made – Monster Bolts 440278 while the optional undercut variant

while the optional undercut variant ensures the screw head sits completely flat within countersunk holes—ideal for applications like door hinges

Manufactured from 1035 cold rolled steel with a 360° collet expansion

Note: These screws feature a #3 drill point for drilling into metal

Standards: SAE J476 Type F / IFI 136

Bulk 1/4"-28 Socket Head Cap Screws – Alloy Steel, Black Oxide – USA Made – Monster Bolts 440278 while the optional undercut variantMonster Overview: Proudly Made in the USA, these Bulk 1 4" 28 Socket Head Cap Screws are engineered from premium alloy steel and finished with a durable thermal black oxide coating. The fine UNF thread delivers superior clamp load control, making these screws ideal for precision assemblies and equipment where accuracy and consistency matter. All Monster Bolts USA made black oxide socket fasteners are fully RoHS compliant and ship fast from our U. S.