SS 316 / 316L / 316Ti Nuts Manufacturer & Exporter in India

Explore SS 316 / 316L / 316Ti Nuts Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.

-196

Min Temp

870

Max Temp

🌡

870

Suitable for continuous service up to approximately 870°C under typical operating conditions.

⚡

620

Typical tensile strength around 620 MPa depending on product form and heat treatment.

🛡

Very Good

Very Good corrosion resistance in a wide range of industrial environments.

⚖

8

Typical density is approximately 8.0 g/cm³.

Product Overview

What are SS 316 / 316L / 316Ti Nuts?

SS 316 / 316L / 316Ti nuts are austenitic stainless steel fasteners manufactured from UNS S31600, S31603, and S31635 bar stock conforming to ASTM A276 and ASTM A479. The addition of molybdenum (2.0-3.0%) to the standard 18-8 chromium-nickel base significantly improves resistance to chloride pitting and crevice corrosion, making these grades the preferred choice across marine, chemical, and pharmaceutical industries.

Grade 316L limits carbon to 0.030% maximum, eliminating sensitisation risk in welded assemblies without post-weld heat treatment. Grade 316Ti incorporates titanium stabilisation (5×C minimum) to prevent intergranular corrosion in high-temperature service up to 800°C. All three grades are manufactured to ASTM A194 Grade 8M and are fully interchangeable in most ASME pressure vessel and piping applications.

Quick Specifications

Material	SS 316 / 316L / 316Ti
UNS Number	S31600 / S31603 / S31635
DIN Number	1.4401 / 1.4404 / 1.4571
Material Standard	ASTM A276 / ASTM A479
Nut Standard (Metric)	DIN 934 / DIN 6915 / ISO 4032
Nut Standard (Inch)	ASME B18.2.2 / ASTM A194 Gr 8M
Thread Form	ISO Metric / UNC / UNF
Diameter Range	M3-M100 / ¼"-4"
Tensile Strength	515 MPa (75 ksi) min
Yield Strength	205 MPa (30 ksi) min
Hardness	Max 35 HRC / 192 HB

? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other SS 316 / 316L / 316Ti Fastener Products Available from RealBolt

RealBolt also manufactures the complete SS 316 / 316L / 316Ti fastener range from certified bar stock per ASTM, including Bolts, Screws, Washers, Studs, and Threaded Rods in all standard configurations. All SS 316 / 316L / 316Ti fastener types ship with EN 10204 MTC 3.1/3.2 documentation and are available in standard sizes and custom-machined specials.

SS 316 / 316L / 316Ti Bolts

SS 316 / 316L / 316Ti Screws

SS 316 / 316L / 316Ti Washers

SS 316 / 316L / 316Ti Studs

SS 316 / 316L / 316Ti Threaded Rods

Technical Data

SS 316 / 316L / 316Ti Nuts Dimensions, Sizes & Thread Standards

SS 316 / 316L / 316Ti Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 934 (hex nuts), DIN 936 (thin hex nuts), ISO 4032 / ISO 4033. Custom thread forms available. Inch dimensions per ASME B18.2.2 and ASTM A194 Grade 8M.

Hex Nut Dimensions - Metric (DIN 934 / ISO 4032)

Size (M)	Pitch (mm)	A/F (mm)	Nut Height (mm)	A/C (mm)	Weight (kg/100 pcs)
M3	0.5	5.5	2.4	6.01	0.08
M4	0.7	7	3.2	7.66	0.18
M5	0.8	8	4.0	8.79	0.30
M6	1.0	10	5.0	11.05	0.55
M8	1.25	13	6.5	14.38	1.20
M10	1.5	17	8.0	18.90	2.60
M12	1.75	19	10.0	21.10	4.10
M16	2.0	24	13.0	26.75	8.80
M20	2.5	30	16.0	33.53	17.20
M24	3.0	36	19.0	39.98	29.50
M30	3.5	46	24.0	50.85	60.00
M36	4.0	55	29.0	60.79	104.00
M42	4.5	65	34.0	72.02	170.00
M48	5.0	75	38.0	82.60	258.00
M56	5.5	85	45.0	93.56	400.00
M64	6.0	95	51.0	104.86	580.00

Dimensional & Material Standards

Standard	Covers	Thread
DIN 934	Hex nuts, standard height	Metric
DIN 936	Hex nuts, thin (jam nuts)	Metric
DIN 6915	Heavy hex nuts, structural	Metric
ISO 4032	Hex nuts, style 1	Metric
ISO 4033	Hex nuts, style 2 (high)	Metric
ASME B18.2.2	Hex & heavy hex nuts	UNC/UNF
ASTM A194 Gr 8M	Nuts for high-pressure service	UNC/UNF

Material Standard	Requirement
ASTM A276	Bar/rod - UNS S31600/S31603/S31635
ASTM A479	Bar for pressure vessel use
ASTM A194 Gr 8M	Nut mechanical properties
EN 10088-3	European stainless bar standard
EN 10204 3.1	Mill test certificate
EN 10204 3.2	TPI-witnessed MTC

Material Chemistry

SS 316 / 316L / 316Ti Chemical Composition

SS 316 / 316L / 316Ti Nuts are manufactured from an iron-chromium-nickel alloy with chromium (16–26%), nickel (8–28%), and grade-specific molybdenum additions per ASTM and ASTM A193/A194. Chromium content governs the self-healing passive oxide film; molybdenum (2–6%) enhances chloride pitting resistance; and carbon content determines sensitization risk in welded assemblies.

Chemical Composition per ASTM A276 / EN 10088-3

Element	SS 316 (S31600)	SS 316L (S31603)	SS 316Ti (S31635)
Carbon (C)	0.08% max	0.030% max	0.08% max
Chromium (Cr)	16.0-18.0%	16.0-18.0%	16.0-18.0%
Nickel (Ni)	10.0-14.0%	10.0-14.0%	10.0-14.0%
Molybdenum (Mo)	2.0-3.0%	2.0-3.0%	2.0-3.0%
Titanium (Ti)	-	-	5×C min, 0.70% max
Manganese (Mn)	2.0% max	2.0% max	2.0% max
Silicon (Si)	0.75% max	0.75% max	0.75% max
Phosphorus (P)	0.045% max	0.045% max	0.045% max
Sulphur (S)	0.030% max	0.030% max	0.030% max
Nitrogen (N)	0.10% max	0.10% max	0.10% max

? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why SS 316 / 316L / 316Ti Alloy Composition Matters for Nuts

Mo (2.0–3.0%) — Chloride Pitting Resistance

Molybdenum raises the pitting resistance equivalent number (PREN) of 316-series nuts to approximately 24–26, providing meaningful resistance to chloride-induced pitting in coastal, marine, and chemical environments where standard 304 nuts fail rapidly.

316L — Low Carbon for Weld-Zone Integrity

By capping carbon at 0.030%, 316L nuts resist sensitisation in the heat-affected zone of welded assemblies. This eliminates intergranular corrosion at grain boundaries without requiring post-weld annealing, making 316L the default choice for fabricated pressure vessels and piping systems.

316Ti — Titanium Stabilisation for Elevated Temperature

Titanium in 316Ti preferentially combines with carbon, preventing chromium carbide precipitation at grain boundaries during sustained service between 425°C and 800°C. This makes 316Ti nuts the correct selection for heat exchanger flanges, furnace hardware, and exhaust system connections where 316L would sensitise over time.

Fastener Performance

SS 316 / 316L / 316Ti Nuts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for SS 316 / 316L / 316Ti Nuts per ASTM. SS 316 / 316L / 316Ti nuts achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Recommended Tightening Torque - SS 316 / 316L / 316Ti Nuts (ISO Metric)

Nut Size	Dry (Nm)	Lubricated (Nm)	Clamp Load (kN)
M6	7	5.5	5.5
M8	17	13.5	10.5
M10	34	27	17.0
M12	58	46	24.5
M16	145	116	58.0
M20	285	228	92.0
M24	490	392	133.0
M30	980	784	210.0
M36	1700	1360	305.0
M42	2720	2176	420.0
M48	4050	3240	555.0

?? Galling Warning: Austenitic stainless steel nuts are prone to galling under high torque. Always apply molybdenum disulphide (MoS2) paste or PTFE-based thread lubricant. Lubricated values assume K=0.17. Never run stainless nuts dry at high speed.

Industry Applications

SS 316 / 316L / 316Ti Nuts Applications — Industries & End Uses

SS 316 / 316L / 316Ti Nuts from RealBolt are specified across food and dairy, pharmaceutical, marine, chemical processing, and oil and gas where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.

Chemical & Petrochemical Processing

SS 316 / 316L / 316Ti hex nuts and heavy hex nuts are the standard specification for ASME B16.5 flange connections in chemical reactors, distillation columns, and heat exchangers handling chloride-bearing process streams, dilute acids, and organic solvents. 316L is preferred for welded nozzle connections to avoid sensitisation.

Marine & Coastal Infrastructure

Hex nuts, flange nuts, and coupling nuts in SS 316 are specified for offshore platform deck fittings, jetty structural connections, boat building hardware, and coastal architectural metalwork where salt spray and tidal immersion demand superior chloride resistance over standard 304 stainless.

Pharmaceutical & Food Processing Equipment

SS 316L nuts are mandatory in FDA-regulated pharmaceutical manufacturing, food processing, and dairy equipment where surface cleanliness, resistance to cleaning chemicals (CIP/SIP), and freedom from contamination are critical. Low carbon content prevents corrosion in steam-sterilised assemblies.

Water Treatment & Desalination Plants

Hex nuts and coupling nuts in SS 316 / 316L are used throughout reverse osmosis membrane housings, pressure filter vessels, chlorination dosing systems, and seawater intake pipework where molybdenum content provides resistance to chloride pitting that would rapidly attack 304-grade fasteners.

SS 316 / 316L / 316Ti Nuts Standards & International Certifications

SS 316 / 316L / 316Ti Nuts from RealBolt Engineering Industries are manufactured to internationally recognised fastener dimensional standards covering thread form, tolerances, strength grades, and quality requirements. Every batch ships with EN 10204 MTC 3.1/3.2, IS 12427 compliance, ISO 3506 material certification, NACE MR0175, and PMI (XRF) reports — available on request for all orders.

Standards

DIN 934 DIN 980 DIN 982 DIN 985 DIN 439 DIN 315 DIN 1587 DIN 6923 ISO 4032 ISO 7040 ISO 4161 ASME B18.2.2 EN ISO 4032 BS EN ISO 4032 IS 1363 IS 1364 IS 6623 IS 12427 SAE J995 UNI 5588 UNI 6593 CSN 021123 PN 82144

Certifications

ISO 9001:2015PED 2014/68/EUNABL LabMTC 3.1 / 3.2RoHS Compliant

Buy SS 316 / 316L / 316Ti Nuts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified SS 316 / 316L / 316Ti Nuts — for competitive pricing, EN 10204 MTC 3.1/3.2 documentation, and fast Mumbai dispatch. Standard sizes are ex-stock; custom dimensions accepted with 2–3 week lead time. Request your quote today.

Answers for Buyers

SS 316 / 316L / 316Ti Nuts — Frequently Asked Questions

Browse expert answers to common questions about SS 316 / 316L / 316Ti Nuts from RealBolt — covering ASTM A193/A194 grades, chloride resistance, temperature limits, sensitization, sizes, and MTC documentation. Contact our technical team directly for project-specific guidance on SS 316 / 316L / 316Ti nuts selection and pricing.

What is the difference between SS 316, 316L, and 316Ti nuts?

The three grades share the same chromium-nickel-molybdenum base but differ in carbon content and stabilisation. SS 316 is the standard grade suitable for most general applications. SS 316L limits carbon to 0.030% maximum, preventing sensitisation in welded assemblies and making it the preferred choice for fabricated pressure vessels and piping. SS 316Ti incorporates titanium stabilisation (minimum 5×C) to prevent intergranular corrosion during sustained service between 425°C and 800°C – the correct selection for heat exchanger flanges and furnace hardware where 316L would sensitise over time.

What ASTM standard covers SS 316 / 316L / 316Ti nuts?

SS 316 / 316L / 316Ti nuts for high-pressure and high-temperature bolted connections are manufactured to ASTM A194 Grade 8M, which specifies mechanical properties, hardness limits (max 35 HRC), and proof load requirements. The bar stock used to manufacture the nuts conforms to ASTM A276 or ASTM A479. For metric nuts, dimensional standards are DIN 934 (standard hex), DIN 936 (thin hex), and ISO 4032 / ISO 4033. Inch-series nuts conform to ASME B18.2.2 for dimensions.

How do I prevent galling when tightening SS 316 nuts?

Galling is the primary installation risk with austenitic stainless steel nuts. Always apply a molybdenum disulphide (MoS2) paste, PTFE-based thread lubricant, or a dedicated anti-galling compound such as Jet-Lube SS-30 or Molykote 1000 to both the thread and the bearing face before assembly. Reduce torque values by approximately 20% compared to dry assembly values. Never run stainless nuts down at high speed with an impact wrench – use a torque wrench and tighten in stages. Pairing SS 316 nuts with bolts of a different surface finish or hardness also reduces galling risk.

Can SS 316L nuts be used in food and pharmaceutical applications?

Yes – SS 316L is the preferred grade for FDA-regulated food processing, dairy, beverage, and pharmaceutical manufacturing environments. The low carbon content prevents corrosion in steam-sterilised (SIP) and chemically cleaned (CIP) assemblies. Surface finish options including electropolishing (Ra = 0.8 µm) are available to meet hygienic design requirements under EHEDG and 3-A Sanitary Standards. All material is supplied with EN 10204 3.1 MTC confirming chemical composition and mechanical properties.

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Ahmedabad
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