28-6665 - Flat Head Machine Screws - #4-40 Length 1/2''
Nickel-plated steel binder head screws 100 per package
Mfr Name: SPC Technology
Mfr Number: 18M6005
28-6660 - Flat Head Machine Screws - #4-40 Length 1/4''
Mfr Number: SPC21823
I've ordered several times from MCM and have always been very satisfied with their products, service and shipping.