Pipe Fittings and Flanges Manufacturers in India  |   Seamless & Welded Pipe Manufacturers  |   Flexible Hose Pipe Manufacturers  |  Email Us on sales@metline.in

SS 304 Hex Nuts. Top Quality SS 304 Hex Nuts or SS 304 Heavy Hex Nuts at Best Prices!

Stainless Steel 304 Hex Nuts, DIN 934, ISO 4032


Biggest Manufacturer of SS 304 Nuts & Bolts in India – We Sell Finished Hex Nuts in 304 Stainless Steel

  • Key Nut Products: Hex Nuts, Heavy Hex Nuts, Lock Nuts, Nylon Lock Nuts, Jam Nuts, Dome Nuts, Square Nuts
  • Normal Dia : ¼” to 4″ or M6 to M100
  • ASTM A194 – This specification covers carbon, alloy and stainless steel nuts intended for use in high-pressure and/or high- temperature service. Unless otherwise specified, heavy hex nuts (ANSI B 18.2.2) shall be used.

Metline produces premium quality SS 304 nuts, SS 304 hex nuts and SS 304 heavy hex nuts in a wide range lengths and sizes and in accordance with ASTM/ASME/DIN standards and specifications. 304 stainless steel nuts are used with bolts or studs and washers, to make a complete set. We produce both hot forged nuts and cold formed nuts in almost all shapes & sizes. The common standard of ASME/ANSI Hex Nut is ASME B18.2.2, which includes normal hex nut, hex thin nut, hex thick nut and heavy hex nut. These nuts manufactured by Metline are intended for high-pressure or high-temperature service, or both.


Metline is a specialized manufacturer and supplier of stainless steel 304 hex nuts, along with SS 304 bolts or studs and washers. SS 304 hex nuts are generally manufactured in accordance with DIN Standard 934 or ISO Standard 4032. We can offer fastest delivery for SS 304 hex nuts and SS 304 heavy hex nuts manufactured as per DIN 934, DIN 6923, DIN 1587, DIN 928, DIN 929.

Stainless steel 304(SS304) is the most basic stainless steel known as 18-8 grade with higher chromium and low carbon content. The low carbon content restricts carbide precipitation during welding as well as minimizes its susceptibility to intergranular corrosion. Stainless steel 304L(SS304L) is an extra low-carbon variation of SS304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding. Both SS304 and SS304L have excellent resistance to a wide range of atmospheric, chemical and petrochemical, and food industry corrosions. Usually, they can be used in applications with the maximum temperature of 1650°F[900°C] exhibiting good oxidation resistance.

ASTM A194 Nut Grades Available for Production & Supply

2H, 2HMCarbon Steel
3Type 501
4Carbon, Molybdenum Steel
6Type 410S41000
7, 7MType 4140, 4142, 4145, 4140H, 4142H, 4145H
8Type 304S30400
8MType 316S31600
8TType 321S32100
16Chromium Molybdenum Vanadium

Stainless Steel Nuts

304 (B8), 316 (B8M), 316 L, 316 Ti ,317 L, 310, 321H (B8T), 347H (B8C), SS 410 (B6) , 904 L (UB6) , A453 GR 660 A/B/C & D.

Duplex & Super Duplex Steel Nuts

UNS S31803 / UNS S32205 (F 51), UNS S32750 (F 53), UNS S32760 (F 55), UNS S31254 (SMO 254).

High Nickel Alloys Nuts

Monel 400 , Monel K 500, Incoloy 600, Incoloy 625, Incoloy 800H, Incoloy 825, Incoloy 718 , Inconel X – 750, Alloy 20 (CB 20) , Hastelloy C 276 , Hastelloy C 22, Hastelloy C4.

Other Alloys Nuts

Titanium Gr 2, Titanium Gr 5, Aluminium Bronze (AB 2) , Phosphorous Bronze (PB).

Material Hardness Specification as per ASTM A194

Grade & TypeBrinell HardnessRockwell Hardness
C ScaleB Scale
2H to 1-1⁄2 in. or M36, incl.248-32724-35
2H over 1-1⁄2 in. or M36212-32735 max95 min
2HM and 7M159-23584 – 99
3, 4, 7, 16248-32724 – 35
8, 8C, 8M, 8T, 8F, 8MLCuN126-30032 max60 min

Chemical Composition of Various Materials, as per ASTM A194 Specification

GradeCarbonManganesePhosphorous, maxSulfur, maxSiliconChromiumNickelMolybdenumOther Elements
2, 2H and 2 HM0.40% min.1.00% max.0.04%0.05%0.40% max
30.10% min.1.00% max.0.04%0.03%1.00%4.0-6.0%0.20-0.30%
40.40 -0.50%0.70-0.90%0.04%0.04%0.15-0.35%0.20-0.30%
6F0.15%1.25%0.06%0.06%1.00%12.0-14.0%Selenium-0.15% min
7 and 7M (AISI 4140)0.37-0.49%0.65-1.10%0.04%0.04%0.15-0.035%0.75-1.20%0.15-0.25%
8 (AISI 304)0.08%2.00% max0.05%0.03%1.00% max18.0-20.0%8.0-11.0%
8M (AISI 316)0.08%2.00% max0.05%0.30%1.00% max16.0-18.0%10.0-14.0%2.00-3.00%
8C0.08%2.00%0.05%0.03%1.00%17.0-19.0%9.0-12.0%Columbium and Tantalum – 10x carbon content, min
8T0.80%2.00%0.05%0.30%1.00%17.0-19.0%9.0-12.0%Titanium-0.70%max, Nitrogen-0.10%
8R0.06%4.0-6.0%0.05%0.03%1.00%20.5-23.5%11.5-13.5%1.50-3.00%Columbium and Tantalum-0.10-0.30%, Nirogen-0.20-0.40%, Vanadium-0.10-0.30%
160.36-0.47%0.45-0.70%0.04%0.40%0.15-0.35%0.80-1.15%0.50-0.65%Vanadium-0.25-0.35%, Aluminum-0.015%


Additional information


Normal Dia : ¼" to 4" 6-100 mm
Length : As Specified by user or Upto any Length

Surface Finish

Blackening, Cadmium Zinc plated, Galvanized, Hot Dip Galvanized, Nickel Plated, Buffing, P.T.F.E. Coated


Metric, BSW, BSF, UNC, UNF, and as per costumers requirement


A nut is a type of fastener with a threaded hole. Nuts are almost always used opposite a mating bolt to fasten a stack of parts together. The two partners are kept together by a combination of their threads' friction, a slight stretch of the bolt, and compression of the parts.


DIN 6915 CI. 10, Stainless Steel AISI 304 / 316. Heavy hex nuts ASTM A194 Gr.8, 8M
ASTM A 194 Gr. 2H, 2HM, G4, G7, G7M, A563/A563M Gr. A, B, DH / 8S/ 10S.
DIN934 / BS3692 CI.6, 8, 10, 12. BS4395 Part 1 & 2


Go to Top