We designed the SmartFlex™ BK420 general purpose work glove to be a tough protector. BK420 provides excellent performance and comfort while preventing oils from penetrating the glove, making it the workhorse of choice. 


About the glove 

Ideal for projects requiring precision, Brass Knuckle® BK420 is the same comfortable-fitting, 13-gauge nylon, knit glove popularized by our 400 Series lineup, but then palm-coated in foam nitrile. The resulting sponge-like slip resistance is unlike any other, providing critical barrier protection to the wearer while also delivering excellent slip and abrasion. The nitrile coating is an ideal choice when enhanced grip is needed despite wet conditions — even oil. 

With its classic black palm coating on a dark gray liner, this is a glove that encourages compliance with its unmatched fit and sleek appearance. But compare BK420 in price — this workhorse is a best-in-class value. 


  • Nitrile coating on full fingers and palm. The ideal choice for dry, wet, and oily applications, nitrile-coated gloves provide excellent resistance to tears, snags, abrasions, oils, and fuels. 
  • Foam coating features millions of micropores that channel liquids away from the surface and, compared to smooth coatings, improves slip resistance. The 13-gauge nylon shell fits snugly and ensures excellent dexterity. 
  • Uncoated back and wrist improves ventilation. 
  • Color-coded cuffs indicate glove size — simplify re-issuing. 
  • Full knit wrist — seamless and stretchable — provides a snug fit and prevents dirt, debris, and cold from getting inside glove.

Roll Up Your Sleeves and Tear In

SMARTFLEX BK420 Brochure (pdf)

Brass Knuckle Hand Protection Catalog (pdf)

Brass Knuckle Sorter