Dimensional Standard of Fastener

American (ASME / API)

Bolts: ASME B18.2.1

Nuts: ASME B18.2.2

ISO (International)

Bolts/Screws: ISO 4016, ISO 4017

Nuts: ISO 4032, ISO 4033

Studs: ISO 13918

European & German (EN / DIN)

Structural: EN 14399

Bolts: DIN 933

Nuts: DIN 934

Russian (GOST)

Structural: GOST R 52643, GOST R 52644, GOST R 52645

Chinese (GB / Industrial)

National: GB (General), GB/T 10433

Industrial: HG (Chemical), SH (Petrochemical), NB (Energy), JB (Machinery)

 

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Coatings & Surface Treatment

Base Layer / Plating

Zinc Series: Zinc plating, Zn-Ni plating

Phosphate: Zinc/Manganese Phosphate

High Performance: Whitford® Xylar 2, Whitford® Xylan 4090

Thermal Diffusion: Sheradizing 

Top Layer

Whitford® Xylan Series: Xylan 1424, Xylan 1014, Xylan 1070, Xylan 1052, Xylan 1427

Color Options

Blue, Green, Yellow, Red, Black

 

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Fastener Materials

Carbon & Alloy Steel

High Temp / High Pressure:

Bolts: ASTM A193 Gr.B7, B7M, B16; ASTM A320 Gr.L7, L7M, L43

Nuts: ASTM A194 Gr.2H, 2HM, 4, 7, 7M

Structural & General:

ASTM A307 Gr.A, B; ASTM A325/A325M (Type 1); ASTM A490/A490M (Type 1)

ASTM F1554 Gr.36, 55, 105; ASTM A540 Gr.B21, B22, B23, B24

ASTM A563 Gr.O, A, B, C, D, DH, DH3; A563M Gr.5, 9, 8S, 10S, 12

ISO/Metric Grades:

ISO 898-1 / GB 3098-1 (Gr.4.8, 5.6, 5.8, 8.8, 10.9, 12.9)

ISO 898-2 / GB 3098-2; GB/T 1231 Gr.8.8, 10.9

Raw Materials: 30CrMo, 35CrMo, ML15Al, S235, S355

Russian Grades: GOST R 52628 Gr.4, 5, 8, 10, 12

Stainless Steel

ASTM Grades (Bolts):

ASTM A193 Gr.B8 CL1&2 (S30400), B8C (S34700), B8M CL1&2 (S31600), B8T (S32100)

Special: B8MLCuN (S31254), ASTM A320 Gr.B8/B8C/B8M/B8T CL1&2

ASTM F593 S304, S304L, S316, S316L

ASTM A453 Gr.660A, 660B, 660C, 660D

ASTM Grades (Nuts):

ASTM A194 Gr.8 (TP304), 8C (TP347), 8M (TP316), 8T (TP321), 8MLCuN (S31254)

ASTM F594 S304, S304L, S316, S316L

ISO/Metric Grades:

ISO 3506-1 / GB 3098.6 (Gr.A2-70, A4-70, A4-80)

ISO 3506-2 / GB 3098.15 (Gr.A2-70, A4-70, A2-80, A4-80)

EN 10088 / DIN 17440 (1.4301)

Nickel Alloys

Inconel / Incoloy: A1014 (B637) N07718; B572 N06002; F468/F468M N06625

Monel: F468/F468M N04400 (Monel 400)

Others: F467/F467M N06625, N04400

Copper Alloys 

Aluminum Bronze: Aluminum Bronze

Brass: Brass, H65

Standards: F468/F468M C63000, C27000; F467/F467M C63000, C27000

Duplex Steel

Standard: ASTM A1082 S31803 (Duplex 2205), S32760 (Super Duplex)