PTFE coated bolt and nut:

STUD BOLT & U_BOLTS:
1. Din 975, class 4.8, class 8.8
2. UNC, 2A, grade 2, grade 5, ASTM A193 B7
3. Size: M6 to M50 or 1/2 " to 2 " 
4. Length: 50mm to 4000mm or 2 to 12' (12 feet) 
5. Finish: Plain, black ,zinc plated, hot dip galvanized.

HEX BOLT
Material: ASTM A193 B7,  B8,  B8M.
Specification: ANSI B18.2.1, ANSI B18.2.6, DIN931 and DIN933.

HEX NUT
Material: ASTM A194 2H, ASTM A194 Gr.8, ASTM A194 Gr. 8M
Specification: ANSI B 18.2.2

WASHER 
Flat washer and Spring Washer
Material: Carbon Steel and Stainless Steel.
Specification: ASTM F436, ANSI B 18.22.1, ANSI B18.21.1, 
DIN125, DIN9021, DIN 127, DIN 7980.

Surface protection: Plain, Hot dip galvanized, Galvanization, Dacroment, Xylan. Black ,Teflon Coating (PTFE)
Packing: Standard packing or According to customers' requirements