Countersunk screw 1/4" - 20 UNC x 7/8"
1/4" - 20 x 7/8" countersunk screw with internal hexagon drive, UNC, length 22.23 mm
American coarse thread UNC
20 threads per inch
ASME/ANSI B 18.3-2002
Countersunk head 82°
Hardness RC 39 - 44
Class FIT 3A
similar to DIN 7991
Length including head 7/8" = 22.23 mm
Thread diameter 6.35 mm
Wrench size 5/32"
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Bondhus Gorilla Grip Allen/Socket Inch 0.05- 3/16" Set
This Product was added to our catalogue on 19/05/2026.