USS pattern flat washers are manufactured from low carbon steel to meet ASTM F844

ThruLOK® comes in specific lengths that allow contractors to replace their 1/2" carriage and through-bolts in three primary deck applications:

1-8 x 3 1/4 Socket Cap Screw Alloy

Straight shank Ground shank M2 high speed steel Extra flexibility for drilling in inaccessible areas Suitable for: Stainless Steel Medium alloyed materials

3/4 x 24 ITM SDS Plus Hammer Drill Bit

M20-2.50 x 160 Socket Cap Screw 12.9 Alloy Plain DIN 912 1/2-20 Button Socket Cap Screws Alloy USS pattern flat washers areM20 2. 50 x 160 Socket Cap Screw 12. 9 Alloy Plain DIN 912 . Alloy Socket Head Cap Screws from Brighton Best. Hardness of RC 38 43, meets or exceeds DIN 912. Manufactured from heat treated alloy steel, 1960 series.