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Shop No- 6B, Ground Floor, Sindhi Ln, opposite Municipal School, Charni Road East, Cawasji Patel Tank, Girgaon, Mumbai, Maharashtra 400004
Email ID -
Physical Address -
Shop No- 6B, Ground Floor, Sindhi Ln, opposite Municipal School, Charni Road East, Cawasji Patel Tank, Girgaon, Mumbai, Maharashtra 400004
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.
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 Studs & Bolts | Available in blue, green & red color |
PTFE coating thickness | 20 ± 5 microns to 45± 5 microns thick. |
Temperature range | up to + 500°F |
Coating Corrosioin Resistance | up to 3,000 hrs (Nuts not frozen) Salt Spray (ASTM B117) |
Hardness Value | 5H – 6H (ASTM D3363-92A) |
Coating Friction Coefficient | 0.06 – 0.08 |
Nominal Thickness | 0.001” (1 mil) |
Impact Strength | 160 in lb (ASTM D2794-93) |
Elongation | 35%-50% |
Adhesion | 5B (ASTM D3359-95) |
Tensile Stress | 4,000 psi |
Working Pressure | Up to 100,000 psi |
SAE Specification |
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Teflon Coated B7 Stud Bolts Size Metric |
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PTFE Coated Bolts and Nuts Size Inch |
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PTFE Coated Fasteners International Specification | IS, ANSI, ASTM, DIN, ISO, JIS, GB, ASME, BS, UNI, CSN, EU, IFI, PN, |
ASME B18.31.2 Xylan Bolts Standard |
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PTFE U-Bolt Standard Sizes | M10, M4, M16, M36 M2.5, M6, M30, M12, M8, M14, M2, M3, M20, M24, M5 to M160 |
Blue Teflon Coated Bolts Threads | Unified 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 Drive | Phillips, Slotted, Phillips/Slot, Six-Lobe |
MTC (Manufacturer Test Certificate) | EN 10204 / 3.1 |
Xylan Coated B7 Studs Production Process |
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Teflon Coated Hex Head Bolts Packing |
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Free Sample | Yes if we have in stock |
Payment Terms | Paypal, 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 Formats | JPEG, PDF, CAD, STP, IGS |
Manufacturing Process |
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Delivery Time | 7-15 working days as usual, It will based on the detailed order quantity. |
Port of Dispatch | Mumbai or Kalamboli ports in Maharashtra state of India |
ASTM A307 Grade A Teflon Bolts Plating Specifications |
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Grades |
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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 Range | n/a |
Thermal Conductivity Value | n/a |
Salt Spray Resistance (ASTM B117) | excellent |
Thickness of coating | .0008″ – .002″ |
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 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 BOLT SIZE |
Torque Chart FT-LBS | ||
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30% Initial Torque |
70% Torque |
100% Final Torque |
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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 |
1¼ | 217 | 505 | 722 |
1.3/8 | 294 | 685 | 979 |
1½ | 388 | 905 | 1292 |
1.9/16 | 441 | 1030 | 1471 |
1.5/8 | 501 | 1169 | 1670 |
1¾ | 631 | 1471 | 2102 |
1.7/8 | 783 | 1827 | 2610 |
2 | 960 | 2240 | 3199 |
2¼ | 1388 | 3238 | 4626 |
2½ | 1923 | 4487 | 6410 |
2¾ | 2341 | 5462 | 7802 |
3 | 3061 | 7143 | 10204 |
PTFE COATED BOLT SIZE |
Torque Chart Nm | ||
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30% Initial Torque |
70% Torque |
100% Final Torque |
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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 |
1¼ | 294 | 685 | 979 |
1.3/8 | 399 | 929 | 1327 |
1½ | 526 | 1227 | 1752 |
1.9/16 | 598 | 1396 | 1994 |
1.5/8 | 679 | 1585 | 2264 |
1¾ | 856 | 1994 | 2850 |
1.7/8 | 1062 | 2477 | 3539 |
2 | 1302 | 3037 | 4337 |
2¼ | 1882 | 4390 | 6272 |
2½ | 2607 | 6084 | 8691 |
2¾ | 3174 | 7405 | 10578 |
3 | 4150 | 9685 | 13835 |
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 |
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