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sales@www.nknutbolt.com

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Shop No- 6B, Ground Floor, Sindhi Ln, opposite Municipal School, Charni Road East, Cawasji Patel Tank, Girgaon, Mumbai, Maharashtra 400004

 

PTFE Coated Fasteners

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Ceramic, zinc flake, and Xylan or PTFE coated fasteners are typically coated using conventional air spraying methods, followed by a curing process. This process not only adheres the coating to the surface of the fasteners but also enhances the durability of the finish. PTFE-coated bolts, stud bolts, and nuts significantly improve lifespan and performance. Neelkamal Alloys LLP is a prominent PTFE coated bolts and nuts manufacturer and supplier in Mumbai, India. PTFE-coated bolts and nuts are recognized for their exceptional corrosion resistance, low coefficient of friction, consistent tensioning, and ease of installation and removal. 

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Fasteners with a PTFE coating, such as PTFE coated hex head bolts and blue Teflon coated studs, are designed to provide exceptional resistance against corrosion, chemicals, and high temperatures. These PTFE fasteners are very essential in fields such as chemical manufacturing, maritime engineering, and oil and gas, where reliability and durability are critical. Even in the toughest conditions, the PTFE covered bolts provide seamless installation, low friction, and a long service life.

As a trusted name among PTFE coated hex head bolt manufacturers in India, Neelkamal Alloys Pvt. Ltd. offers a wide selection of PTFE coated fasteners. Made to meet exacting standards for quality, our product line includes Teflon coated bolts, PTFE coated screws, and Teflon coated bolts. Even in the most hostile and demanding surroundings, the well-kept PTFE coating thickness on our fasteners guarantees outstanding protection and functioning.

We provide a broad assortment of fasteners, including PTFE coated studs, Teflon coated nuts, and PTFE coated bolts, designed to cater to various industrial applications. We especially favor our blue Teflon coated bolts for their robust resistance to wear and their reliable performance under high-pressure conditions. Additionally, Teflon bolts and nuts offer an excellent fit and dependable performance for diverse projects.

PTFE and Teflon coatings shield fasteners from corrosion and chemical exposure. The smooth surface ensures easier installation and efficient operation. Industries such as marine, chemical processing, and industrial manufacturing find it suitable. Tailored PTFE bolt coating solutions are available to meet specific project needs.

Choose Neelkamal Alloys Pvt. Ltd. for a reliable selection of PTFE fasteners and Teflon coated fasteners. Explore our range of products, including PTFE coated screws, Teflon nuts and bolts, and more, to find the ideal solution for your requirements. Contact us today to discuss your needs!

PTFE Coated Bolts and Nuts Fasteners Specification

PTFE Coated Studs & BoltsAvailable in blue, green & red color
PTFE coating thickness20 ± 5 microns to 45± 5 microns thick.
Temperature rangeup to + 500°F
Coating Corrosioin Resistanceup to 3,000 hrs (Nuts not frozen) Salt Spray (ASTM B117)
Hardness Value5H – 6H (ASTM D3363-92A)
Coating Friction Coefficient0.06 – 0.08
Nominal Thickness0.001” (1 mil)
Impact Strength160 in lb (ASTM D2794-93)
Elongation35%-50%
Adhesion5B (ASTM D3359-95)
Tensile Stress4,000 psi
Working PressureUp to 100,000 psi
SAE Specification
  • Bolts: SAE J429
  • Nut : SAE J995
Teflon Coated B7 Stud Bolts Size Metric
  • Dia: M10 – M110
  • Length: 12 – 1200MM
PTFE Coated Bolts and Nuts Size Inch
  • Dia: 1/2″ –
    4.0″
  • Length: 1/2″ – 52″
PTFE Coated Fasteners International SpecificationIS, ANSI, ASTM, DIN, ISO, JIS, GB, ASME, BS, UNI, CSN, EU, IFI, PN,
ASME B18.31.2 Xylan Bolts Standard
  • American ASME
  • Indian IS
  • International ISO
  • American SAE
  • German DIN
  • Spanish CSN
  • British BS
  • Italian UNI
  • Polish PN
  • European EU
PTFE U-Bolt Standard SizesM10, M4, M16, M36 M2.5, M6, M30, M12, M8, M14, M2, M3, M20, M24, M5 to M160
Blue Teflon Coated Bolts ThreadsUnified national coarse (UNC), Unified national fine (UNF), Unified national extra fine (UNEF), UNJC and UNJF threads, UNK threads, UNR threads, Constant-pitch threads
PTFE Hex Bolt Head DrivePhillips, Slotted, Phillips/Slot, Six-Lobe
MTC (Manufacturer Test Certificate)EN 10204 / 3.1
Xylan Coated B7 Studs Production Process
  • M2-M24: Cold Forging, Hot forging
  • M24-M100, machining and CNC for Customized connecting element
Teflon Coated Hex Head Bolts Packing
  • Wooden Pallet, Canton, Carton / Small Box or as required
  • Carton size : 36* 24 *16 CM & 36 *24 *12 CM  or as required
  • Pallet size: Standard Euro Pallet 110* 80 *90 CM
Free SampleYes if we have in stock
Payment TermsPaypal, Western Union, T/T (Telegraphic Transfer or Wire Transfer), L/C or Trade Assurance 30% deposit & balance before shipping
Preferred PTFE Coated Nut Bolt Drawing FormatsJPEG, PDF, CAD, STP, IGS
Manufacturing Process
  • Heading
  • Machining
  • Threading
  • Heat treatment
  • Plating
  • Baking
  • QA
  • Package
  • Shipping
Delivery Time7-15 working days as usual, It will based on the detailed order quantity.
Port of DispatchMumbai or Kalamboli ports in Maharashtra state of India
ASTM A307 Grade A Teflon Bolts Plating Specifications
  • ASTM A153 Zinc coating (hot dip)
  • ASTM B695 zinc coating
  • ASTM F1941 Electrodeposited coatings (Zinc plating).
  • ASTM F2329 Zinc coating, hot dip

Specification of Xylan® Coating

Grades
  • Xylan® 1424
  • Xylan® 1425
  • Xylan® 1427
  • Xylan® 1010
  • Xylan® 1014
  • Xylan® 1052
  • Xylan® 1070
Tensile Stress (ASTM D1708)4000 – 5000 psi
Impact Strength (ASTM D256)13 ft – lb/in
Elongation (ASTM D1457)50%
Coefficient of Friction (ASTM D1894).15 – .35 static
Hardness Value (ASTM D2240)60 – 90 HB (shore D)
Abrasion Resistance Property (Tabor)> 15 mg
Water Absorption (ASTM D570)< .03 %
Dielectric Stress (ASTM D149)1400 volts per mil
Chemical Resistance (ASTM D543)good
Temperature Range-100°F to 500°F max
Melting Rangen/a
Thermal Conductivity Valuen/a
Salt Spray Resistance (ASTM B117)excellent
Thickness of coating.0008″ – .002″
Ready stock of Teflon Coated B7 Stud Bolts, Teflon Nut Bolt, 1070 Coated Grade 8.8 Studs and Nuts, ASTM A194 Grade 2H Heavy Hex PTFE Coated Nuts, PTFE Coated 8Mm Threaded Rod

Extensive testing and real-world applications indicate that the future of Teflon-coated B7 stud bolts lies with Fluoropolymer coatings. Previously, hot-dip galvanization, cadmium, or zinc plating were standard practices. However, these coatings often fail in corrosive environments prevalent in many industries. PTFE-coated B7 studs paired with 2H nuts are widely utilized across various applications for their superior performance. The electroplating process for fasteners begins with thoroughly cleaning the surface in an alkaline detergent solution. Following this, the fasteners are treated with acid to remove any rust or scale. Ensuring the surface is free from oil or rust is crucial, as these contaminants can hinder the adhesion of coatings. While the primary goal of applying a coating is to protect the fasteners, care must be taken during cleaning, as hydrogen absorption can occur. If these hydrogen-absorbed screws are used in sour-well environments, they risk becoming susceptible to hydrogen embrittlement, rendering PTFE-coated fasteners ineffective. Fasteners classified as strength classes 10.9 and above, along with USA Grade 8 fasteners, are particularly vulnerable to this issue. To mitigate the risk, the coated fasteners undergo a baking process; however, it is essential to note that complete prevention of hydrogen embrittlement cannot be guaranteed.

PTFE Coated Fasteners Price List India

PTFE Coated A193 B7M HEX BOLT, Size 1/2 X 45MM 260/Pcs
PTFE Coated A193 GR.B7M STUD BOLT with 2 A194 GR. 2HM HEX NUTS, Size 1/2 X 130MM 132/Pcs
PTFE Coated Bolts Torque Chart
PTFE COATED BOLT
SIZE
Torque Chart FT-LBS
30% Initial
Torque
70%
Torque
100% Final
Torque
1/2 12 29 41
9/16 18 41 59
5/8 24 57 82
3/4 43 101 145
7/8 70 163 233
1 105 245 350
1.1/8 154 359 513
217 505 722
1.3/8 294 685 979
388 905 1292
1.9/16 441 1030 1471
1.5/8 501 1169 1670
631 1471 2102
1.7/8 783 1827 2610
2 960 2240 3199
1388 3238 4626
1923 4487 6410
2341 5462 7802
3 3061 7143 10204

PTFE COATED BOLT
SIZE
Torque Chart Nm
30% Initial
Torque
70%
Torque
100% Final
Torque
1/2 16 39 56
9/16 24 56 80
5/8 33 77 111
3/4 58 137 197
7/8 95 221 316
1 142 332 475
1.1/8 209 487 696
294 685 979
1.3/8 399 929 1327
526 1227 1752
1.9/16 598 1396 1994
1.5/8 679 1585 2264
856 1994 2850
1.7/8 1062 2477 3539
2 1302 3037 4337
1882 4390 6272
2607 6084 8691
3174 7405 10578
3 4150 9685 13835
PTFE Coated Fasteners Available Material and Grades
PTFE Coated Carbon Steel Nut Bolt AISI 1018, AISI 1045, AISI 1117, AISI 12L14, AISI 1215, ASTM A36, ASTM A29, A108, A549, SAE J429, ASTM A307 Grade A/ B/ C PTFE Coated Fasteners
Teflon Coated High Tensile Bolts PTFE Coated Grade 4.8, grade 8.8, grade 10.9, grade 12.9, grade 4.6, Grade 5.8, Grade 9.8 Studs and Nuts
ASTM Standard Blue Teflon Coated ASTM A320, A325, A36, A320 L7 , L7m, A320 Grade B8, A320 B8m, A307, A540, A563, A354, A490, A593, F593C, F593D, F593G Bolts
Alloy Steel Xylan Coated Studs Xylan Coated AISI 4140, AISI 4130, ASTM A193 B7/ B8 / B8M/ B8 Class 2/ B8M Class 2, ASTM A320 L7/ L43 Fasteners
Types of PTFE Coated Bolt Nut Fasteners
  • Teflon Coated B7 Stud Bolts
  • PTFE U-Bolt
  • Blue Teflon Coated Bolts
  • ASME B18.31.2 Xylan Bolts
  • PTFE Hex Bolt
  • Teflon Coated Washers
  • Xylan Coated B7 Studs
  • Teflon Coated Hex Head Bolts
  • PTFE Coated Nut Bolt
  • ASTM A307 Grade A Teflon Bolts
Polytetrafluoroethylene Coated Bolts Applications
  • Oil & Gas Industries
  • Chemical Industry
  • Petroleum Industries
  • Nuclear Energy Sector
  • Defence Industry
  • Aerospace Industry
Teflon Coated Hex Bolts Supplier and Exporter - Neelkamal Alloys LLP
Please note: Teflon® and Xylan® brand originally owned by Dupont.
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