TVS Hex Nuts, ISO 4032 metric – M4 to M64, grades 5, 8, 10 and 12

TVS Sundram Fasteners Hex Nuts, ISO 4032 metric are hexagon nuts made by Sundram Fasteners Limited to ISO 4032 / IS 1364-3, in metric sizes from M4 to M64, property classes 5, 8, 10 and 12, supplied in zinc phosphate and 4 plated or coated finishes (listed below). They are the standard mating nuts for hex head bolts and screws of the same thread, made by cold forging, with hot forging for the larger sizes, and carry the TVS mark on the face.

SFL's retail price list of October 2026 gives recommended retail list prices from Rs 180 to Rs 190,360 per 100 pieces across the listed sizes; the exact price for your sizes, pitch, property class and finish is confirmed on enquiry.

Jai Enterprises is an authorised distributor of TVS Sundram Fasteners high tensile fasteners and supplies them from Bhilai and Raipur all over Chhattisgarh - Bhilai, Raipur, Durg, Korba, Bilaspur, Raigarh, Jagdalpur, Kanker, Ambikapur and every other district - and across India.

Is this the right one for you?

Check these four things before you order:

• Your thread is metric coarse or fine (M sizes) - the pitches listed in the table.
• The size you need is within M4 to M64.
• You need a plain hex nut in class 5, 8, 10 or 12; pair a class 8 nut with 8.8 bolts and a class 10 nut with 10.9 bolts.
• Vibration is not the main concern - otherwise look at the SunLoc nylon insert nuts or the prevailing torque nuts.

List prices (SFL, 1 October 2026)

Prices are SFL's recommended retail list prices effective 1 October 2026, in rupees per 100 pieces, for the phosphated finish. A few sizes are shown; ask us for any other size in the range.

• M6 x 1: Rs 180 (GR 8) / Rs 230 (GR 10) per 100 pieces
• M8 x 1.25: Rs 230 (GR 8) / Rs 240 (GR 10) per 100 pieces
• M10 x 1.5: Rs 335 (GR 8) / Rs 430 (GR 10) per 100 pieces
• M12 x 1.75: Rs 575 (GR 8) / Rs 620 (GR 10) per 100 pieces
• M20 x 2.5: Rs 3,325 (GR 8) / Rs 3,325 (GR 10) per 100 pieces
• Phosphated finish; GR 8 and GR 10 listed (ISO 4032 / DIN 934)
• SFL quotes about 10 weeks delivery for grade 10 standard-pitch nuts; non-standard pitches in grade 10 on enquiry
• For the fine-pitch sizes and for M52 to M64, delivery and quantity are confirmed at the enquiry stage (the list runs to M72; sizes above M64 on enquiry)

At a glance

• Brand: TVS Sundram Fasteners (Sundram Fasteners Limited, TVS group)
• Product: Hex Nuts, ISO 4032 metric
• Standard: ISO 4032 / IS 1364-3
• Sizes: M4 to M64
• Form: hexagon
• Property class: 5, 8, 10 and 12
• Material: Steel
• Surface finish: zinc phosphate, trivalent iridescent (5 / 8 / 10), trivalent white (5 / 8 / 10), hot dip galvanised (5 / 8 / 10) and zinc flake coating (Geomet / Magni / Delta)
• Forging: cold forging, with hot forging for the larger sizes
• List price: Rs 180 - 190,360 per 100 pieces (SFL list, 1 October 2026); exact price on enquiry
• Supplied by: Jai Enterprises, Bhilai and Raipur - to every district of Chhattisgarh and across India, +91 9340081159

Specifications and dimensions

• Standard: ISO 4032 / IS 1364-3
• Material: high tensile steel; nut classes to ISO 898-2
• Property class: 5, 8, 10 and 12
• Surface finish options: zinc phosphate, trivalent iridescent (5 / 8 / 10), trivalent white (5 / 8 / 10), hot dip galvanised (5 / 8 / 10) and zinc flake coating (Geomet / Magni / Delta)
• Manufacture: cold forging, with hot forging for the larger sizes
• Marking: TVS brand mark on the face and the property class mark
• M4: pitch 0.7; across flats 7.00 mm, across corners 7.66 mm, thickness 3.05 mm
• M5: pitch 0.8; across flats 8.00 mm, across corners 8.79 mm, thickness 4.55 mm
• M6: pitch 1.0; across flats 10.00 mm, across corners 11.05 mm, thickness 5.05 mm
• M8: pitch 1.25 / 1.0; across flats 13.00 mm, across corners 14.38 mm, thickness 6.62 mm
• M10: pitch 1.5 / 1.25 / 1.0; across flats 16.00 mm, across corners 17.77 mm, thickness 8.22 mm
• M12: pitch 1.75 / 1.5 / 1.25 / 1.0; across flats 18.00 mm, across corners 20.03 mm, thickness 10.58 mm
• M14: pitch 2.0 / 1.5; across flats 21.00 mm, across corners 23.36 mm, thickness 12.80 mm
• M16: pitch 2.0 / 1.5; across flats 24.00 mm, across corners 26.75 mm, thickness 14.80 mm
• M18: pitch 2.5 / 2.0 / 1.5; across flats 27.00 mm, across corners 29.56 mm, thickness 15.80 mm
• M20: pitch 2.5 / 1.5; across flats 30.00 mm, across corners 32.95 mm, thickness 18.00 mm
• M24: pitch 3.0; across flats 36.00 mm, across corners 39.55 mm, thickness 21.50 mm
• M27: pitch 3.0; across flats 41.00 mm, across corners 45.20 mm, thickness 23.80 mm
• M30: pitch 3.5; across flats 46.00 mm, across corners 50.85 mm, thickness 25.60 mm
• M33: pitch 3.5; across flats 50.00 mm, across corners 55.37 mm, thickness 28.70 mm
• M36: pitch 4.0; across flats 55.00 mm, across corners 60.79 mm, thickness 31.00 mm
• M39: pitch 4.0; across flats 60.00 mm, across corners 66.44 mm, thickness 33.40 mm
• M42: pitch 4.5; across flats 65.00 mm, across corners 71.30 mm, thickness 34.00 mm
• M45: pitch 4.5; across flats 70.00 mm, across corners 76.95 mm, thickness 36.00 mm
• M48: pitch 5.0; across flats 75.00 mm, across corners 82.60 mm, thickness 38.00 mm
• M52: pitch 5.0; across flats 80.00 mm, across corners 88.25 mm, thickness 42.00 mm
• M56: pitch 5.5; across flats 85.00 mm, across corners 93.56 mm, thickness 45.00 mm
• M64: pitch 6.0; across flats 95.00 mm, across corners 104.86 mm, thickness 51.00 mm
• Note: ISO 4032 covers the coarse-pitch sizes; the fine-pitch sizes in the table correspond to ISO 8673 (DIN 934 covers both)
• Source: SFL's technical product catalogue (September 2026 edition) and SFL's digital product catalogue; dimensions in mm

Why choose TVS Sundram Fasteners

• Made by Sundram Fasteners Limited, a TVS group company making high tensile fasteners since 1966: first Indian company with ISO 9000, IATF 16949:2016 certified, Deming Prize 2018 for 17 plants.
• Every lot is backed by a BIS, NABL and ISO/IEC 17025 certified laboratory - tensile, fatigue, torque-tension, salt spray and coating thickness testing - as described in SFL's technical product catalogue (September 2026 edition).
• Made to a named standard - ISO 4032 / IS 1364-3 - with the dimensions published in SFL's technical catalogue, so parts interchange with any other maker's to the same standard.
• The grade mark on each part shows its property class (5, 8, 10 and 12), so site inspection is simple.
• A choice of finishes - zinc phosphate, trivalent iridescent (5 / 8 / 10), trivalent white (5 / 8 / 10), hot dip galvanised (5 / 8 / 10) and zinc flake coating (Geomet / Magni / Delta) - from plain indoor use to hot dip galvanised and zinc flake coating for outdoor and corrosive service.
• Available through Jai Enterprises in Bhilai and Raipur, with the full size range to order.

How to choose and fit

1. Match the thread of the bolt exactly - size and pitch (or threads per inch) - from the table above.
2. Match the class: class 8 nuts with 8.8 bolts, class 10 with 10.9, class 12 with 12.9 (nut class not lower than the bolt class).
3. Fit a washer under the nut where the joint face is soft, slotted or painted.
4. Tighten to the specified torque with the bolt held.

Where it is used

• every hex bolt and screw joint of the same thread
• structural steel and fabricated frames
• automotive and tractor assemblies
• maintenance and repair stock

Other versions and series

• TVS Sundram Fasteners Hex Nuts, DIN 934 - M10, M12, M14 and M22, list price Rs 335 - 4,325 per 100
• TVS Sundram Fasteners Hex Nuts, inch UNC/UNF - 1/4" to 1", list price Rs 225 - 5,880 per 100
• TVS Sundram Fasteners Hex Nuts, inch BSW/BSF - 1/4" to 3/4", price on request

Related products

• TVS Sundram Fasteners Hex Head Cap Screws, ISO 4017 metric - the matching hex head cap screw
• TVS Sundram Fasteners Hex Head Bolts, ISO 4014 metric - the matching hex head bolt
• TVS Sundram Fasteners SunLoc Nylon Insert Nuts, DIN 982 / ISO 7040 - the locking version with a nylon insert

Frequently asked questions

What is the price of Hex Nuts, ISO 4032 metric?

SFL's recommended retail list price effective 1 October 2026 runs from Rs 180 to Rs 190,360 per 100 pieces across the listed sizes, for the phosphated finish. The examples above show typical sizes. Call Jai Enterprises on +91 9340081159 with your sizes, grade, finish and quantity for the exact price; other finishes and sizes outside the list are quoted on enquiry.

Which nut class goes with which bolt?

Use a nut class at least equal to the first number of the bolt class: class 8 nuts with 8.8 bolts and class 10 with 10.9 bolts (class 12 nuts, for 12.9 bolts, are quoted on enquiry). A weaker nut can strip before the bolt reaches its load.

Are TVS Hex Nuts, ISO 4032 metric available in Chhattisgarh?

Yes. Jai Enterprises, an authorised distributor of TVS Sundram Fasteners, supplies from Bhilai and Raipur all over Chhattisgarh and across India. Call +91 9340081159 or use the enquiry form.

Can I get a different finish or a non-listed size?

Yes. The standard finishes are zinc phosphate, trivalent iridescent (5 / 8 / 10), trivalent white (5 / 8 / 10), hot dip galvanised (5 / 8 / 10) and zinc flake coating (Geomet / Magni / Delta); other finishes and sizes or lengths outside the list are quoted on enquiry from SFL.

How to order

Call Jai Enterprises on +91 9340081159 or send an enquiry with the sizes, pitch, property class, finish and quantity of Hex Nuts, ISO 4032 metric you need. SFL's list price is Rs 180 - 190,360 per 100 pieces across the listed sizes (SFL list, 1 October 2026); the exact price is confirmed on enquiry. We supply from Bhilai and Raipur all over Chhattisgarh - Bhilai, Raipur, Durg, Korba, Bilaspur, Raigarh, Jagdalpur, Kanker, Ambikapur and every other district - and across India.