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Counter bore screws 12 point, 4140 alloy steel  American standard Counter bore screws
12 point, 4140 alloy steel
American standard
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Our 12-point counterbore screws feature 12 drive surfaces for high torque driving. The design provides the same bearing surface as hex or socket head cap screws of comparable size and fit a standard 12-point socket. Generally available in both course and fine threads in diameters from 3/16" to 2" and lengths to 30". Minimum tensile is 170,000 PSI.

*refers to length under flange
+refers to 12 point socket or wrench size

Enter the exact quantity you require and we will try accommodate you. Upon receipt of your inquiry, we will confirm our best price and delivery. Please contact us for diameters over 1".

PART NO. DIAMETER *LENGTH MATERIAL FINISH FLANGE DIAMETER FLANGE TKS. WRENCH SIZE +TORQUE PRICE QTY REQ ACTION
COUNTBORE-4000 1/4-20 3/8" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4020 1/4-20 1/2" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4040 1/4-20 5/8" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4060 1/4-20 3/4" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4080 1/4-20 7/8" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4100 1/4-20 1" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4120 1/4-20 1-1/4" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4140 1/4-20 1-1/2" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4160 1/4-20 1-3/4" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4180 1/4-20 1-3/4" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4200 1/4-20 2" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4220 1/4-20 2-1/4" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4240 1/4-20 2-1/2" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4260 1/4-20 2-3/4" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4280 1/4-20 3" alloy steel plain 0.375" max. 0.058" 1/4" 15. ft lbs.. on application
COUNTBORE-4500 1/4-28 3/8" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft. lbs. on application
COUNTBORE-4520 1/4-28 1/2" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-4540 1/4-28 5/8" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-4560 1/4-28 3/4" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-4580 1/4-28 7/8" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-4600 1/4-28 1" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-4620 1/4-28 1-1/4" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-4640 1/4-28 1-1/2" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-4660 1/4-28 1-3/4" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-4680 1/4-28 2" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-4700 1/4-28 2-1/4" alloy steel plain 0.375" max. 0.058" 1/4" 17 ft lbs. on application
COUNTBORE-5000 5/16-18 1/2" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5020 5/16-18 5/8" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5040 5/16-18 3/4" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5060 5/16-18 7/8" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5080 5/16-18 1" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5100 5/16-18 1-1/4" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5120 5/16-18 1-1/2" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5140 5/16-18 1-3/4" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5160 5/16-18 2" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5180 5/16-18 2-1/4" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5200 5/16-18 2-1/2" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5220 5/16-18 2-3/4" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5240 5/16-18 3" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5260 5/16-18 3-1/2" alloy steel plain 0.469" max. 0.074" 5/16" 31 ft lbs. on application
COUNTBORE-5400 5/16-24 1/2" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
COUNTBORE-5420 5/16-24 5/8" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
COUNTBORE-5460 5/16-24 3/4" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
COUNTBORE-5480 5/16-24 7/8" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
COUNTBORE-5500 5/16-24 1" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
COUNTBORE-5520 5/16-24 1-1/4" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
COUNTBORE-5540 5/16-24 1-1/2" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
COUNTBORE-5560 5/16-24 1-3/4" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
COUNTBORE-5580 5/16-24 2" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
COUNTBORE-5600 5/16-24 2-1/4" alloy steel plain 0.469" max. 0.074" 5/16" 34 ft lbs. on application
 
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