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

Explore SS 316 / 316L / 316Ti Screws 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 Screws?

SS 316 / 316L / 316Ti screws 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 (2-3%) to the standard 18-8 chromium-nickel base significantly improves resistance to chloride pitting and crevice corrosion, making these screws the preferred choice across marine, chemical, and food processing industries.

The 316L variant limits carbon to 0.030% maximum, eliminating sensitisation risk in welded assemblies without post-weld heat treatment. The 316Ti grade stabilises the alloy with titanium (5×C minimum), providing superior resistance to intergranular corrosion at elevated temperatures. All three grades are dual-certified where chemistry permits, and are manufactured to DIN 933, ISO 4017, and ASME B18.6.3 dimensional standards for full interchangeability.

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
Screw Standard (Metric)	DIN 933 / DIN 931 / ISO 4017 / ISO 4014
Screw Standard (Inch)	ASME B18.6.3 / ASME B18.2.1
Thread Form	ISO Metric / UNC / UNF
Diameter Range	M2-M64 / #2-2½"
Tensile Strength	515 MPa (75 ksi) min
Yield Strength	205 MPa (30 ksi) min
Hardness	Max 95 HRB / 217 HB

? All material certified by NABL-accredited laboratory. PMI and dual certification 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, Nuts, 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 Nuts

SS 316 / 316L / 316Ti Washers

SS 316 / 316L / 316Ti Studs

SS 316 / 316L / 316Ti Threaded Rods

Technical Data

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

SS 316 / 316L / 316Ti Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 933 (full thread hex) / DIN 931 (partial thread hex) / ISO 4017 / ISO 4014. Custom lengths in 5 mm increments. Inch dimensions available per ASME B18.6.3 and ASME B18.2.1.

Hex Screw Dimensions - Metric (DIN 933 / ISO 4017)

Size (M)	Pitch (mm)	A/F (mm)	Head Ht (mm)	Min L (mm)	Max L (mm)
M2	0.4	4	1.4	3	20
M3	0.5	5.5	2.0	5	30
M4	0.7	7	2.8	6	50
M5	0.8	8	3.5	8	80
M6	1.0	10	4.0	10	100
M8	1.25	13	5.3	12	150
M10	1.5	17	6.4	16	200
M12	1.75	19	7.5	20	300
M16	2.0	24	10.0	25	400
M20	2.5	30	12.5	30	500
M24	3.0	36	15.0	40	600
M30	3.5	46	18.7	50	800
M36	4.0	55	22.5	60	1000
M42	4.5	65	26.0	80	1000
M48	5.0	75	30.0	100	1200
M64	6.0	95	40.0	140	2000

Dimensional & Material Standards

Standard	Covers	Thread
DIN 933	Hex head screws, full thread	Metric
DIN 931	Hex head screws, partial thread	Metric
ISO 4017	Hex head screws, full thread	Metric
ISO 4014	Hex head screws, partial thread	Metric
DIN 912	Socket head cap screws	Metric
ISO 4762	Socket head cap screws	Metric
ASME B18.6.3	Machine screws, inch	UNC/UNF
ASME B18.2.1	Hex head screws, inch	UNC/UNF

Material Standard	Requirement
ASTM A276	Bar/rod - UNS S31600/S31603/S31635
ASTM A479	Bar for pressure vessel fasteners
ASTM F593	Fastener mechanical properties
EN 10088-3	Stainless steel semi-finished products
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 Screws 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

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. Dual certification 316/316L available where chemistry qualifies.

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

Mo (2–3%) — Chloride Pitting Resistance

Molybdenum raises the critical pitting temperature and PREN to approximately 25, providing meaningful resistance to chloride-induced pitting in coastal, marine, and mild chemical environments where standard 304 screws fail prematurely.

316L — Low Carbon for Weld Sensitisation Prevention

By capping carbon at 0.030%, 316L screws avoid chromium carbide precipitation at grain boundaries during welding or elevated-temperature service. This preserves intergranular corrosion resistance without requiring post-weld annealing — critical for screws used in welded assemblies.

316Ti — Titanium Stabilisation for High-Temperature Service

Titanium at 5×C minimum ties up free carbon as TiC, preventing sensitisation during prolonged exposure between 425°C and 815°C. 316Ti screws are specified for heat exchanger covers, furnace components, and exhaust flanges where 316L would sensitise over time.

Fastener Performance

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

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

Tightening Torque Reference - SS 316 Screws (Metric, Lubricated)

Screw Size	Dry (Nm)	Lubricated (Nm)	Clamp Load (kN)
M6	8	6	5.5
M8	19	15	10.5
M10	38	30	17.0
M12	66	53	24.5
M16	160	128	59.0
M20	315	252	94.0
M24	545	436	136.0
M30	1080	864	215.0
M36	1880	1504	313.0

?? Anti-galling: SS 316 screws are prone to galling under high torque. Always use molybdenum disulphide or PTFE-based lubricant. Lubricated values assume K=0.17. Never dry-torque stainless screws into stainless nuts without lubrication.

Industry Applications

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

SS 316 / 316L / 316Ti Screws 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 & Pharmaceutical Processing

SS 316 and 316L screws are the standard fastener specification for reactor vessel covers, heat exchanger channel heads, pump casing closures, and pipeline flanges handling dilute acids, chloride-bearing process streams, and pharmaceutical-grade fluids. 316L is preferred where welded assemblies are involved. FDA-compliant surface finishes available.

Marine & Coastal Infrastructure

Hex head and socket head cap screws in SS 316 are specified for offshore platform grating, handrail systems, dock fittings, boat deck hardware, and seawater cooling system flanges. The molybdenum content provides meaningful resistance to chloride pitting in splash-zone and tidal environments where 304 screws corrode within months.

Food Processing & Beverage Equipment

SS 316L screws with electropolished or passivated finishes are used throughout food processing conveyors, mixing vessels, filling machines, and CIP (clean-in-place) pipework. The low carbon content and smooth surface finish minimise bacterial adhesion and resist the aggressive caustic and acid cleaning cycles used in dairy, brewing, and meat processing facilities.

Water Treatment & Desalination Plants

Flange screws and machine screws in SS 316 are specified for reverse osmosis membrane housings, pressure filter vessels, chemical dosing systems, and clarifier mechanisms. Resistance to chlorinated water and hypochlorite dosing solutions makes 316 the minimum acceptable grade for potable water contact applications per BS EN 1452 and WRAS approval requirements.

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

SS 316 / 316L / 316Ti Screws 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 84 DIN 85 DIN 912 DIN 913 DIN 914 DIN 915 DIN 916 DIN 6912 DIN 7984 DIN 7985 DIN 7991 DIN 965 DIN 966 DIN 967 ISO 4762 ISO 10642 ISO 14579 ASME B18.3 ASME B18.6.3 EN ISO 4762 IS 1363 IS 1367 IS 12427 SAE J933

Certifications

ISO 9001:2015PED 2014/68/EUNABL LabWRAS ApprovedMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified SS 316 / 316L / 316Ti Screws — 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 Screws — Frequently Asked Questions

Browse expert answers to common questions about SS 316 / 316L / 316Ti Screws 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 screws selection and pricing.

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

All three grades share the same 16-18% chromium, 10-14% nickel, and 2-3% molybdenum base composition. The key differences are carbon content and stabilisation. SS 316 is the standard grade with carbon up to 0.08%. SS 316L limits carbon to 0.030% maximum, preventing sensitisation in welded assemblies without post-weld heat treatment – making it the preferred choice for most fabricated equipment. SS 316Ti adds titanium at a minimum of 5×C, which stabilises the alloy against intergranular corrosion during prolonged service between 425°C and 815°C. Where chemistry qualifies, 316 and 316L are dual-certified and fully interchangeable. 316Ti is a distinct grade and cannot be dual-certified with 316L.

Can SS 316 screws be used in seawater immersion?

SS 316 screws provide good resistance to seawater splash and atmospheric marine exposure, but are not recommended for continuous full seawater immersion, particularly in crevice-prone geometries such as under screw heads or in threaded joints. In immersed seawater, crevice corrosion can initiate on 316 at temperatures above approximately 15°C. For continuous seawater immersion, super duplex (UNS S32750) or nickel alloy fasteners such as Alloy 625 are the correct specification. For coastal and splash-zone applications, 316 performs reliably with correct installation and periodic inspection.

What surface finishes are available for SS 316 / 316L / 316Ti screws?

Standard supply is mill finish (as-machined). Additional finishes available include passivation per ASTM A967 or ASTM A380 (removes free iron, restores passive oxide layer), electropolishing (reduces surface roughness Ra to below 0.4 µm, improves corrosion resistance and cleanability – specified for pharmaceutical and food contact applications), and bright annealing. Black oxide is not recommended for 316 as it reduces corrosion resistance. All surface treatments are documented on the MTC.

Are SS 316 screws suitable for use with aluminium structures?

Stainless steel 316 screws can be used with aluminium, but galvanic corrosion of the aluminium is a risk in wet or marine environments due to the electrochemical potential difference between the two metals. In dry indoor environments, direct contact is generally acceptable. In outdoor or marine environments, isolate the screw from the aluminium using PTFE washers, neoprene gaskets, or an isolating sleeve, and apply a compatible sealant at the joint. Aluminium will be the sacrificial anode in the galvanic couple, so protection of the aluminium is the primary concern, not the stainless screw.

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