Bolts:

Hex head bolts and screws, High strength bolts  for structural application, Stud bolts 

Nuts: 

Hex nuts, Heavy hex nuts, High strength nuts  for structural application, Lock nuts 

Washers: Plain washer, Spring washer 

Standards: ASME B18.2.1,B18.2.2, ISO 4016,4017,4032,4033, DIN 933,DIN 934

Materials:

Carbon Steel/ Alloy Steel 

Bolts 

ASTM A193 Gr.B7,B7M,B16;A320 Gr.L7,L7M,L43 A307 Gr.A,B; F3125 

Nuts 

ASTM A194 Gr.2H,2HM,4,7,7M A563 Gr.O,A,B,C,D,DH,DH3 A563M Gr.5,9,8S,10S,12,8S3,10S3

Stainless Steel 

Bolts

ASTM A193 Gr.B8,B8M;A320 Gr.B8 ,B8M  ISO 3506-1Gr.A4-70,A4-80 F593 S304,S304L,S316,S316L

UNS S31803, UNS S32205, UNS S32750, UNS S32760

Nuts

A194 Gr.8 (TP304),8C (TP347), 8M (TP316)、 8T (TP321),ISO 3506-2Gr.A4-70,A4-80 F594 S304、S304L、S316、S316L

UNS S31803, UNS S32205, UNS S32750, UNS S32760

Coatings: 

PTFE ,Ceramic, Hot Dip Galvanized, Dacromet