Why Choose Vision Alloys for Silicon Bronze Fasteners

M3 to M56

Ready Stock Metric Range

C651 & C655

Dual Silicon Bronze Grades

25+ Countries

Global Marine Fastener Exporter

EN 10204/3.1B

Mill Test Certification

Fast Dispatch

Stock & Export Ready

Zinc, Nickel & Chrome

Marine Plating Options

ASME & DIN

Standards Compliant Bronze Bolts

Direct Factory Price

No Middleman Markup

silicon bronze fasteners specification

Silicon Bronze Fasteners Snapshot


Ready Stock
M3 to M56

Custom Sizes
3/16″ to 2″

Length
3mm to 200mm

International Standard
DIN 970, 931, 933

US Standard
ASME B18.2.1 & B18.2.2

Raw Material Origin
South Africa, Europe, India, New Zealand

MTC
EN 10204/3.1B

Suitable Environment
Mild Acids & Salt Water

Thread Pitch
Coarse & Fine Thread

Surface
Phosphating, Oxidation, HDG

Threads
UNJ, Rolled, UNR, UNC, UNF

Temp. Range
475°C – 700°C
To know about the latest price list of Silicon Bronze Fasteners, please Contact Us →

Table of Content

 

Manufacturer of UNS C65100 Hex Bolts and ASME SB584 C651 Nuts in India

Vision Alloys is a trusted Silicon Bronze Fasteners manufacturer worldwide. We produce fasteners in C651 and C655 grades. Ready stock covers M3 to M56 metric sizes. Custom sizes go up to 2 inch diameter. Length ranges span from 3mm to 200mm overall. Fasteners meet DIN 970, 931 and 933 standards. ASME B18.2.1 and B18.2.2 profiles are strictly followed. ASTM B584 and ASME SB584 govern grade C651. Coatings include Zinc, Nickel and Chrome plating finishes. Every production batch carries EN 10204/3.1B mill certification. Fasteners suit mild acids and salt water environments. Operating temperature range covers 475°C to 700°C safely. Key applications include oil, gas and marine projects.

Silicon Bronze Screws

Silicon Bronze Screws

UNS C65100 Washer

UNS C65100 Washer

Silicon Bronze Ring Nails

Silicon Bronze Ring Nails

 

Silicon Bronze Fasteners Specification

Check Silicon Bronze Fasteners Supplier in India who provides wide Range of Sizes

Bolts Size
Silicon Bronze Fasteners Metric Size
  • M3-M56
Metric Size
Silicon Bronze Bolts Size
  • M1.2 To M48

 

Length
ASME SB584 C651 Lock Nut Size
  • M2 To M20
Thread Pitch
UNS C65100 Hex Bolts Thread Pitch
  • Coarse
  • Fine
Manufacturing Methods
ASME SB584 C651 Flat Washers Manufacturing Methods
  • Hot Forging
  • CNC Machined
  • Cold Forging
Form
UNS C65600 Ring Shank Nails Form
  • E
  • B
  • D
  • C
  • G
  • A

 

Temperature
UNS C65100 Square Bolt Melting Point
  • 970°C to 1060°C
Standards
Silicon Bronze Bolts ASTM Standards
  • ASTM B584
Material
UNS C65100 Studs Grades
  • CDA 651
  • CDA 655

 

Finish
ASME SB584 C651 Flat Washers Surface
  • Passivation
  • Phosphating
  • Oxidation
Machines
UNS C65500 U Bolt Machines
  • CNC Lath
  • Making Machines
  • Thread Rolling
Testing
Silicon Bronze Anchor Bolts Testing
  • 100% Tested Silicon Bronze Fasteners with MTC EN 10204 3.1/3.2

 

Thread Types
Silicon Bronze Wood Screws Thread Types
  • BSF
  • UNC
  • BSW
  • UNR
  • UNF
  • UTS
  • ACME
  • UN8
  • UNM

 

Fastener Types
C651 Silicon Bronze Fasteners Types
  • threaded rod
  • hex bolt
  • screws
  • nuts
  • stud bolt
  • washers
  • bolt

 

Value Added Services
Silicon Bronze Carriage Bolts Value Added Services
  • Bagging
  • Head Painting
  • Head Shank Drilling
  • Thread Locking
Drive Style
Silicon Bronze Screws Drive Types
  • Truss
  • Torx
  • Hexagon washer
  • Oval
  • Round
  • Pan
  • Hex
  • Cross

 

Head Types
Silicon Bronze Machine Screws Head Types
  • Flat
  • Pan
  • Socket cap head
  • Frearson Drive
  • Phillips Drive
  • Hex washer head
  • Truss
  • Button head
  • Oval
  • Slotted hex washer
  • Combination Drive
  • Hex head
  • Slotted Drive
Thread Class
Silicon Bronze Deck Screws Class
  • 2G
  • 5 HF
  • Class 3A (Tight fit)
  • 5 CSF
  • 6G
  • Class 2A (Medium fit)
  • 8G
  • 5 ONF
  • Class 1A (Loose fit)
  • custom
  • 3G
  • 4G

 

 

Request For Quote

Get Instant Pricing From Silicon Bronze Fasteners Supplier in India

Buy C651 Silicon Bronze Bolts and Nuts at Factory Price Worldwide


Send RFQ

Supplier of C651 Silicon Bronze Flat Washers as Per DIN, ISO & ASME Standards, Refer Torque Specs

Check exact torque values before installing washers on marine bolted joints

Silicon Bronze Bolts Torque Chart

Torque values change with bolt diameter and thread pitch. A 1/4-20 bolt needs 68.8 in-lbs torque. A 3/8-16 bolt requires 219 in-lbs torque. Correct torque prevents joint failure and thread stripping. It also avoids damage from over-tightening bolts. Marine environments add vibration and saltwater exposure risks. Following exact torque values extends fastener service life. This chart helps engineers verify installation accuracy quickly. It remains a useful reference for field technicians

Bolt Size Silicon bronze bolts torque value
(in-lbs)
4-40 4.8
4-48 6.1
5/16-24 131
1/4-28 87
5-40 7.1
7/16-20 371
5-44 8.7
6-32 8.9
3/8-16 219
6-40 11.2
1/4-20 68.8
5/16-18 123
3/8-24 240
8-32 18.4
8-36 20.4
7/16-14 349
10-24 21.2
10-32 29.3

 

C651 bolts suit cold forming and electrical work. C655 bolts offer higher strength for marine use. Full thread bolts allow adjustable grip length easily. Half thread bolts handle shear loads better. Hex nuts and flange bolts serve different installation needs. Each variant matches specific load and clamping requirements. Vision Alloys keeps both grades in ready stock. This ensures fast turnaround for custom fastener orders. Buyers get flexibility across multiple bolt configurations

Type Guide

Type Guide of Silicon Bronze Bolts


ASTM B584 C651Grade
C65100UNS
260 / 485 N/mm²Proof / Tensile
Cold Forming / ElectricalBest Use

Full Thread Hex Bolt

M3–M56, ASME B18.2.1


Half Thread Hex Bolt

Plain shank, threaded end


ASME SB584 C651 Nut

Coarse & fine thread


Silicon Bronze Flange Bolt

Serrated washer face

ASTM B98 C655Grade
C65500UNS
55 – 100 ksiTensile Range
Marine / StructuralBest Use

Full Thread Hex Bolt

M4–M56, ASME B18.2.1


Half Thread Hex Bolt

Plain shank, threaded end


UNS C65500 Hex Nut

High strength flange joints


Silicon Bronze Carriage Bolt

Marine & offshore use

Stockist of ASME SB584 C651 Bolts Hex Head Bolt With Many Threads and Different Dimension

Wide thread pitch and dimension options available for custom project requirements

UNS C65600 Flat Washer Dimension

Silicon bronze washers come in SAE and USS series. Outer and inner diameters vary with bolt size. Washers distribute load evenly across bolted joints. They also protect surfaces from clamping damage. This matters most in marine and outdoor structures. Thickness ranges stay tight for dimensional accuracy

Silicon Bronze Flat Washer Dimension

Bolt Size 1/8 (#6) 5/32 (#8) 3/16 (#10) 7/32 (#12) 1/4 (#14) 5/16 03/8 7/16 01/2 9/16 05/8 03/4 07/8
SAE OD (in.) 0.375 0.438 0.5 0.562 0.625 0.688 0.812 0.922 1.062 1.156 1.312 1.469 1.75
ID (in.) 0.156 0.188 0.22 0.25 0.281 0.344 0.406 0.469 0.531 0.594 0.656 0.812 0.938
Thickness .036/.065 .036/.065 .036/.065 .051/.080 .051/.080 .051/.080 .051/.080 .051/.080 .074/.121 .074/.121 .074/.121 .108/.160 .108/.160
USS OD (in.) 0.56 0.734 0.875 1 1.25 1.375 1.469 1.75 2 2.25
ID (in.) 0.25 0.312 0.375 0.438 0.5 0.562 0.625 0.688 0.812 0.938
Thickness .036/.065 .051/.080 .064/.104 .064/.104 .064/.104 .086/.132 .086/.132 .108/.160 .122/.177 .136/.192
Bolt Size 1 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 1 7/8 2 2 1/4 2 1/2 2 3/4 3
SAE OD (in.) 2 2.25 2.5 2.75 3
ID (in.) 1.062 1.25 1.375 1.5 1.625
Thickness .108/.160 .108/.160 .136/.192 .136/.213 .153/.213
USS OD (in.) 2.5 2.75 3 3.25 3.5 3.75 4 4.25 4.5 4.75 5 5.25 5.5
ID (in.) 1.062 1.25 1.375 1.5 1.625 1.75 1.875 2 2.125 2.375 2.625 2.875 3.125
Thickness .136/.192 .136/.192 .136/.192 .153/.213 .153/.213 .153/.213 .153/.213 .153/.213 .153/.213 .320/.248 .210/.280 .228/.410S .249/.327

 

Request For Quote

Get a Direct Quote From the Silicon Bronze Fasteners Manufacturer in India

Get C651 Silicon Bronze Bolts and Nuts at factory price, fast delivery to Saudi Arabia and the Middle East


Send RFQ

Bolt Configuration

Full Thread vs Half Thread Silicon Bronze Bolts

Full Thread Silicon Bronze Bolt

Threaded Full Body Length
  • Threading runs entire bolt length
  • Nut position stays fully adjustable
  • Suits thin deck plate clamping

Adjustable Grip Length

Half Thread Silicon Bronze Bolt


Plain Shank Section
Threaded End Only
  • Plain shank resists shear load better
  • Threaded portion engages nut only
  • Preferred for hull vibration joints

Higher Shear Strength

Buy Silicon Bronze Marine Fasteners in Zinc, Nickel and Chrome Plating Finish With Exact Weight as Per Project Requirements

Choose plating finish and weight specification based on your marine application needs

Vision Alloys

ASME SB584 C651 Bolts Surface Finishes




Natural Mill Finish



Bright Polished Finish



Passivated Finish



Self-Forming Protective Oxide Layer



Statuary / Oxidized Patina



Wax / Oil Protective Coating



Electro-Polished Finish



Clear Lacquer Coating

UNS C65500 Machine Screws Weight Chart

Diameters
Row		 Lengths Row 3″ 3/16 2-1/4″ 01/4 03/4 03/8 1-1/4″ 7/16 1″ 9/16 05/8 07/8 1-1/8″ 01/2 1-1/2″ 5/16 1-3/4″ 2″ 2-1/2″ 01/8 2-3/4″
#2 3.4 0.5 2.6 0.6 1.1 0.7 1.6 0.8 1.4 0.9 1 1.3 1.5 0.8 1.8 0.6 2.1 2.4 2.8 0.4 3.1
#3 4.7 0.7 3.6 0.8 1.5 0.9 2.2 1 1.9 1.2 1.3 1.7 2 1.1 2.5 0.9 2.9 3.3 3.9 0.55 4.3
#4 6.5 0.9 5 1 2.1 1.3 3 1.5 2.5 1.7 1.8 2.3 2.8 1.6 3.5 1.2 4 4.5 5.5 0.7 6
#5 8.6 1.2 6.7 1.4 2.6 1.7 4.1 1.9 3.4 2.2 2.3 3 3.8 2 4.7 1.5 5.3 6 7.3 1.1 7.9
#6 9.8 1.5 7.6 1.7 3.2 2.1 4.6 2.2 3.9 2.6 2.8 3.5 4.3 2.4 5.3 1.9 6.1 6.8 8.3 1.4 9.1
#8 15 2.5 11.8 2.8 5 3.4 7.3 3.6 6.2 4.2 4.5 5.6 6.7 3.9 8.3 3.1 9.4 10.6 12.9 — 13.9
#10 21.2 3.9 16.6 4.3 7.3 5 10.4 5.4 8.9 6.2 6.6 8.1 9.6 5.8 11.9 4.6 13.5 15 18.1 — 19.7
#12 25.6 — 20.1 5.6 9.2 6.5 12.8 6.9 11 7.8 8.3 10.1 11.9 7.4 14.7 6.1 16.5 18.3 22 — 23.8
1/4″ 36.4 — 28.8 8.5 13.6 9.8 18.7 10.4 16.1 11.7 12.4 14.9 17.4 11.1 21.2 9.1 23.7 26.2 31.3 — 33.9
5/16″ 61.5 — 19 — 24 17.7 32.3 18.8 28.8 20.9 21.9 26.1 30.2 19.8 36.5 16.7 40.7 44.8 53.2 — 57.3
3/8″ 91.3 — 73.5 — 38 29.2 49.8 30.7 44 33.6 35.1 41 47 32.2 55.8 — 61.7 67.6 79.5 — 85.3

 

Request For Quote

Get a Quote From Silicon Bronze Fasteners Stockist in India

Get ISO, NACE & PED Certified Silicon Bronze Fasteners With Fast Global Export Delivery


Send RFQ

Refer to The Silicon Bronze Fasteners Chemical Composition and Mechanical Properties

Compare copper, silicon and tensile strength values across C651 and C655 grades

Silicon Bronze Bolt Chemical Composition

Chemical Composition
C651
UNS C65100
Cu97.0 (Nominal)
Si2.8 – 3.8
Mn0.50 – 1.3
Fe0.8 max
Zn1.5 max
Ni0.6 max
Pb0.05 max
C655
UNS C65500
Higher Strength
Cu96.0 (Nominal)
Si~3.0
Mn~1.0
Fe0.8 max
Zn1.5 max
Pb0.02 max

Silicon Bronze Fasteners Supplier for Structural and Marine Projects

Silicon Bronze Hex Bolts Equivalent Grades

Grade Equivalents
C651
Low Silicon Bronze B
🇺🇸 UNSC65100
🇺🇸 ASTMB584
🇺🇸 ASMESB584
🇺🇸 CDA651
C655
High Silicon Bronze A
🇺🇸 UNSC65500
🇺🇸 ASTMB98
🇩🇪 DIN2.1525
🇺🇸 CDA655

Mechanical Properties of Silicon Bronze Fasteners

Vision Alloys is ASME SB584 C651 Nut Supplier and Stockist in India

Mechanical Properties
C651 Nut
Up to 2″ dia
0.2% Proof Strength 260 N/mm²
Tensile Strength 485 N/mm²
Elongation 20%
Hardness 75-95 HRC

PED Approved Silicon Bronze Fasteners Supplier, Offering High Strength for Marine and Structural Applications

Price List of C651 Silicon Bronze Fasteners

PED Approved Silicon Bronze Fasteners supplier in India offers direct factory pricing


$
Price List
Silicon Bronze Fasteners Manufacturer in India, Buy Hex Bolts and Nuts at Lowest Export Price


Get Latest Price List

Types of Silicon Bronze Fasteners

Silicon Bronze Fasteners Supplier in India, Get C651 Hex Bolts, Nuts and Washers at Low Cost

ASME SB584 C651 Hex Bolts

ASME SB584 C651 Hex Bolts

  • Standard six-sided head
  • ASME SB584 dimensions
  • Marine hardware use
Silicon Bronze Carriage Bolts

Silicon Bronze Carriage Bolts

  • Round smooth head
  • Square neck anti-turn
  • Wood & deck fastening
UNS C65600 Hex Nuts

UNS C65600 Hex Nuts

  • Coarse & fine thread
  • ASME SB584 profile
  • Corrosion resistant grade
UNS C65100 Flat Washers

UNS C65100 Flat Washers

  • SAE & USS series
  • Load distribution use
  • Export ready packaging
Silicon Bronze Wood Screws

Silicon Bronze Wood Screws

  • Self-tapping thread
  • Boat deck & hull use
  • Non-staining bronze finish
Silicon Bronze Ring Nails

Silicon Bronze Ring Nails

  • Ring shank grip design
  • High pull-out resistance
  • Marine plywood fastening

Grade Comparison

C651 vs C655 Silicon Bronze Difference

C651

Low Silicon Bronze B

Silicon Content

~1%
Electrical Conductivity

High
Cold Formability


Cold heading & bending
Electrical fittings
Decorative hardware
VS
C655

High Silicon Bronze A

Silicon Content

2.8–3.8%
Tensile Strength

High
Marine Corrosion Resist.


Marine hardware
Structural fasteners
Heavy-duty machinery

ISO Certified Silicon Bronze Fasteners Manufacturer in India, Supplying Both C651 and C655 Grades

UNS C65600 Screws, Bolt, Nut Delivery Schedules

Country Name Shipping time
Saudi Arabia 8-10 Days
Qatar 8-10 Days
Oman 7-8 Days
UAE 5 Days
South Africa 25-30 Days
Egypt 11-13 Days
Malaysia 8-10 Days
Turkey 21 Days
Singapore 8-10 Days
Thailand 7 Days

 

Applications Of Silicon Bronze Flat Washers

Explore Silicon Bronze Fasteners Manufacturer in India delivering High Quality Products with Quick Delivery

Applications

Oil & Gas Industry

Marine & Ship Building

Power Plant

Refining Industry

Automotive Industry

Pharmaceutical Industry

Silicon Bronze Fasteners Manufacturing Testing Process

ISO Certified Silicon Bronze Fasteners manufacturer in India uses cold and hot forging

Forging
Silicon Bronze Bolt Forming Method
  • Cold Heading
  • Hot Forging
Testing
Silicon Bronze Fasteners Quality Testing
  • Tensile Testing
  • Hardness Testing
  • Salt Spray Testing
Inspection
Third Party Inspection
  • TPI Available On Request

 

 

Silicon Bronze Hex Nuts Thermal Properties




Heating Capacity
0.38 J/g-°C



CTE, Linear 250°C
18 µm/m-°C



Melting Range
970 – 1025°C



Thermal Conductivity
36 W/m-K



Liquidus
1025°C



Solidus
970°C

 

Project Reference

Silicon Bronze Fasteners Client Reference

CE Approved Silicon Bronze Fasteners stockist in India offers DIN and ASME compliant bolts

🇦🇪

United Arab Emirates

Marine Terminal Fender Upgrade

C651 Hex BoltsASME SB584Heavy Hex
🇸🇦

Saudi Arabia

Refinery Cooling Tower Fastening

C655 Anchor BoltsASTM B584Full Thread
🇩🇪

Germany

Architectural Bronze Cladding

Silicon Bronze ScrewsDIN 933Flat Head
🇸🇬

Singapore

Shipyard Hull Refit

Silicon Bronze Carriage BoltsCorrosion ResistantDeck Fastening
🇦🇺

Australia

Desalination Intake Structure

UNS C65100 NutsSalt Water Resist.Full Thread
🇧🇷

Brazil

Power Plant Piping Support

Silicon Bronze Stud BoltsASME B18.2.1Heavy Hex

Request For Quote

Send Your Enquiry for C651 Silicon Bronze Marine Fasteners

Get Ready Stock Silicon Bronze Bolts, Nuts and Washers Shipped Worldwide


Send RFQ

UNS C65100 Hex Bolts Standard




ASTM B584
M3 to M56



ASME SB584
M2 to M20



DIN 970, 931, 933
M3 to M48



ASME B18.2.1
M1.2 to M48



ASME B18.2.2
M2 to M20



ASTM B98 (C655)
M4 to M56

 

Find Silicon Bronze Fasteners Ready Stock in Following Locations

Estimated transit time from Mumbai port: actual delivery may vary with vessel schedule and customs clearance

🇦🇪UAE5 Days
🇸🇬Singapore8-10 Days
🇶🇦Qatar8-10 Days
🇸🇦Saudi Arabia8-10 Days
🇹🇷Turkey21 Days
🇮🇹Italy16–20 Days
🇩🇪Germany20–24 Days
🇩🇰Denmark22–26 Days
🇮🇪Ireland24–28 Days
🇧🇷Brazil28–32 Days
🇨🇦Canada28–32 Days
🇺🇸USA22–30 Days
🇪🇸Spain18–22 Days
🇬🇧UK22–26 Days
🇿🇦South Africa25–30 Days
🇳🇬Nigeria18–22 Days
🇵🇱Poland24–28 Days
🇲🇽Mexico30–34 Days
🇳🇱Netherlands20–24 Days
🇦🇺Australia14–18 Days

 

Silicon Bronze Hex Bolts Size Chart

NACE Certified Silicon Bronze Fasteners manufacturer in India, offering wide size ranges with third-party inspection for global buyers

UNS C65100 Bolt Size M4 M6 M8 M10 M12 M16 M20
ASME SB584 C651 Nut Width Across Flats 7 10 13 17 19 24 30
Silicon Bronze Flat Washer OD (in.) 0.375 0.438 0.625 0.812 0.922 1.156 1.469
Silicon Bronze Flat Washer ID (in.) 0.156 0.188 0.281 0.406 0.469 0.594 0.812

 

Find Silicon Bronze Fasteners Stockist and Resellers in Below Locations

Italy Germany Denmark Ireland Brazil
Canada USA Spain UK South Africa
Nigeria Poland Mexico Netherlands Singapore
UAE Australia Qatar Saudi Arabia Turkey

 

FAQs

Silicon Bronze Fasteners

What is the difference between C651 and C655 silicon bronze?

C651 has lower silicon, C655 has higher strength.

Are silicon bronze fasteners suitable for saltwater use?

Yes, they resist corrosion well in marine environments.

What sizes does Vision Alloys keep in ready stock?

M3 to M56 metric sizes are stocked.

Do silicon bronze fasteners carry a mill test certificate?

Yes, EN 10204/3.1B MTC ships with every batch.

Our Products

  •  Vision Alloys is A Manufacturer of Steel Fasteners Company in India
  •  Dealers and Distributors of Bolting Products in USA, Europe, New Zealand, Algeria, United Kingdom, Morocco, South Africa and Australia, Egypt, Peru, chile, Jordan, Argentina
  •  Manufacturer and Supplier of Stainless Steel, Nickel Alloy, Titanium, Copper Materials in Mumbai.
  •  Stockist and Trader of Top Quality High Temperature Alloys for Oil and Gas Industry and Standard & Custom Sizes in EX Stock
Sign up today to receive our latest news, special offers and much more.
Call us and get it done
When you hire us for construction services, you know you're getting highly qualified professionals who have the expertise and experience to make sure your project is done properly
and functions.
Get A Quote
Send Your Enquiry
Get a quote in minutes
Or reach us directly:
+91 97694 34949  |  sales@stainlesssteelfasteners.net
Copied to clipboard