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SS 316 Hex Nuts. Top Quality Stainless Steel 316 Hex Nuts or SS 316 Heavy Hex Nuts at Best Prices!

Stainless Steel 316L Hex Nuts, DIN 934, ISO 4032


Biggest Manufacturer of SS 316 Nuts & Bolts in India – We Sell Finished Hex Nuts in 316 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 316 nuts, SS 316 hex nuts and SS 316 heavy hex nuts in a wide range lengths and sizes and in accordance with ASTM/ASME/DIN standards and specifications. 316 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 316 hex nuts, along with SS 316 bolts or studs and washers. SS 316 hex nuts are generally manufactured in accordance with DIN Standard 934 or ISO Standard 4032. We can offer fastest delivery for SS 316 hex nuts and SS 316 heavy hex nuts manufactured as per DIN 934, DIN 6923, DIN 1587, DIN 928, DIN 929.

Stainless steel 316 (SS316) is an austenitic chromium-nickel stainless steel containing deliberate amount of molybdenum which increases general corrosion resistance and especially improves its pitting resistance to chloride ion solutions. The molybdenum addition also provides increased strength at elevated temperatures. Thus, SS316 is also known as “Mo-Added” version of SS304. Stainless steel 316L (SS316L) is the extra-low carbon version of SS316 that minimizes harmful carbide precipitation during welding. Both SS316 and SS316L have exceptional resistance to corrosion against sulfuric, hydrochloric, acetic, formic, and tartaric acids; as well as against acid sulfates and alkaline chlorides. They are widely used in exhaust manifolds, heat exchangers, pharmaceutical equipment, cryogenic piping, valve and pump trims, chemical & petrochemical process, pulp and paper industry, and food industry, etc.

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


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