Fasteners

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Our Products

Industrial Fasteners, Manufactured to Certified Standards

Apollo Steel Industries manufactures a complete range of industrial fasteners — Hex Bolts, Stud Bolts, U-Bolts, Washers and Anchor Fasteners — in Stainless Steel, Alloy Steel, Duplex, Super Duplex and High-Nickel Alloys. We also offer specialized PTFE Coated and Xylan Coated fasteners engineered for anti-corrosive, anti-galling and high-friction-resistant performance in the harshest industrial environments. Every batch is manufactured under strict quality control with complete material and dimensional traceability.

Standard Fastener Hex Bolts and Nuts

Hex Bolts & Nuts

Precision-machined hexagonal bolts and nuts for structural, piping and general engineering assembly. Manufactured in Stainless Steel, Carbon Steel and Alloy Steel with full and heavy series options, suited for high-load and vibration-prone applications.

SizeM6 – M100 / 1/4" – 4"
StandardsASME B18.2.1, DIN 933/931, ISO 4014/4017
MaterialsB7, B8/B8M, Stainless Steel 304, 316, Duplex 2205, supper duplex 2507, Hastelloy, Monel, Inconel, Titanium, 904L, Alloys steel
FinishBlack, Zinc Plated, Passivated, Bright
High Pressure Stud Bolts

Stud Bolts

Full-thread and double-end stud bolts supplied with matching heavy hex nuts for flanged pipe joints and pressure-vessel connections. Available in continuous thread and tap-end configurations for critical, leak-free service.

Size1/2" – 3" (M12 – M75)
StandardsASME B18.2.1, ASTM A193/A194
MaterialsB7, B8/B8M, Stainless Steel 304, 316, Duplex 2205, supper duplex 2507, Hastelloy, Monel, Inconel, Titanium, 904L, Alloys steel
TypeContinuous Thread, Double End, Tap End
Pipe Support U-Bolts

U-Bolts

U-shaped fasteners used for clamping and supporting pipelines, tubes and round structural members. Manufactured to precise bend radii with rolled or cut threads and supplied with matching plates and nuts.

Size1/2" – 24" NB
StandardsMSS SP-58, Client Drawing
MaterialsSS 304/316, Carbon Steel, Galvanized MS
FinishHot Dip Galvanized, Passivated
Load Distribution Washers

Washers

Flat, spring and belleville washers manufactured for even load distribution and vibration resistance in bolted joints. Precision-punched to tight thickness and flatness tolerances.

SizeM6 – M100
StandardsDIN 125, DIN 127, IS 2016
MaterialsSS 304/316, Spring Steel, Carbon Steel
TypeFlat, Spring, Belleville
Heavy Duty Anchor Fasteners

Anchor Fasteners

Wedge Anchors and V-Anchors engineered for secure base-fixing of heavy machinery, structural steel and refractory linings, delivering reliable holding strength in concrete and masonry substrates.

SizeM8 – M32
StandardsClient Drawing / Custom Specification
MaterialsSS 304/316, Carbon Steel, Alloy Steel
TypeWedge Anchor, V-Anchor
Socket Head Allen Cap Screws

Allen Cap Screws

Socket head cap screws with a hexagonal internal drive, machined for high-strength fastening in confined spaces and precision assemblies. Manufactured with close tolerance heads for a clean, low-profile finish.

SizeM3 – M36
StandardsASME B18.3, DIN 912, ISO 4762
MaterialsSS 304/316, Alloy Steel, High Tensile Steel
FinishBlack Oxide, Zinc Plated, Bright
Vibration Resistant Spring Washers

Spring Washers

Split-ring spring washers manufactured to maintain bolt tension and prevent loosening under vibration and cyclic loading in structural and piping joints.

SizeM6 – M100
StandardsDIN 127, IS 3063
MaterialsSpring Steel, SS 304/316, Carbon Steel
TypeSquare , flat
Anti-Corrosive PTFE Coated Fasteners

PTFE Coated Fasteners

Fasteners coated with Polytetrafluoroethylene (PTFE) to provide excellent chemical resistance, low friction and anti-galling performance. Ideal for fasteners exposed to corrosive chemicals, high humidity and saline environments.

Coating Thickness25 – 30 microns
StandardsASTM B117 Salt Spray Tested
MaterialsB7, B8/B8M, Stainless Steel 304, 316, Duplex 2205, supper duplex 2507, Hastelloy, Monel, Inconel, Titanium, 904L, Alloys steel
ColourGreen, Blue, Black (Grade Identified)
Anti-Galling Xylan Coated Fasteners

Xylan Coated Fasteners

Xylan is a fluoropolymer coating applied over fasteners for superior corrosion protection, torque-tension control and galling resistance, commonly specified for offshore, oil & gas and marine fastening applications.

Coating Thickness1 – 2 mil (Xylan 1424 / 1010)
StandardsNACE MR0175, ASTM F1136
MaterialsB7, B8/B8M, Stainless Steel 304, 316, Duplex 2205, supper duplex 2507, Hastelloy, Monel, Inconel, Titanium, 904L, Alloys steel
Friction Coefficient0.10 – 0.15 (Controlled)
Material Grades

Fastener Material & Grade Reference

Common grades supplied against ASTM / ASME standards for our fastener range.

Grade Material Standard Typical Application
B7 Chrome-Moly Alloy Steel ASTM A193 Gr. B7 High Temperature Bolting & Fasteners
B8 / B8M Austenitic Stainless Steel Bolting ASTM A193 Gr. B8 / B8M Corrosion Resistant Bolting & Fasteners
Stainless Steel 304 Austenitic Stainless Steel ASTM A240 / A276 / A312 Gr. 304 General Corrosion Resistant Service
Stainless Steel 316 Austenitic Stainless Steel + Mo ASTM A240 / A276 / A312 Gr. 316 Chemical, Marine & Process Service
Duplex 2205 Duplex Stainless Steel UNS S31803 / S32205 Offshore, Chloride & Chemical Process Service
Super Duplex 2507 Super Duplex Stainless Steel UNS S32750 / S32760 High Chloride, Sour Service & Offshore Applications
Hastelloy Nickel-Chromium-Molybdenum Alloy ASTM B575 / B574 (C276 / C22) Severe Corrosion & High Temperature Service
Monel Nickel-Copper Alloy ASTM B127 / B164 (Monel 400 / K500) Sea Water & Hydrofluoric Acid Service
Inconel Nickel-Chromium Alloy ASTM B168 / B166 / B446 High Temperature & Corrosive Service
Titanium Commercially Pure / Alloyed Titanium ASTM B265 / B348 (Grade 2 / 5) Marine, Aerospace & Chemical Process Service
904L Super Austenitic Stainless Steel UNS N08904 Sulphuric Acid & High Corrosion Service
Alloy Steel Chrome-Moly Alloy Steel ASTM A182 / A335 / A387 High Temperature & High Pressure Service
Where We Deliver

Application Industries

Our fasteners and refractory anchors are trusted across heavy engineering and critical process industries.

Heavy Engineering Industries
Ship Building Industries
Earth Moving Equipment Manufacturers
Steel Plants
Indian Railways
Civil Construction Industries
Locomotive Manufacturers
Mining Industries
Petro-Chemical Industries
Elevators Manufacturers
Fertilizer Plants
Oil Exploration Projects
Power Generation Units (Nuclear, Hydro, Thermal)
Defence Organizations
Pre-Engineered Buildings
Offshore & Marine Structures
Why Apollo Steel

Built for Reliability, Backed by Certification

Certified Quality

Every batch is supplied with complete material test certificates and dimensional traceability.

Exotic Alloy Expertise

Specialized manufacturing in Duplex, Super Duplex, Inconel, Monel and Hastelloy grades.

Custom Manufacturing

Non-standard sizes and drawing-based fasteners manufactured to your exact specification.

On-Time Bulk Supply

Large stock inventory ensures fast turnaround on bulk and repeat project orders.