TVS Socket Set Screws, knurled cup point, BSW – 3/16" to 1/2", hardness 45H

TVS Sundram Fasteners Socket Set Screws, knurled cup point, BSW are headless screws with an internal hexagon drive and a knurled cup point, made by Sundram Fasteners Limited to BS 2470, in inch BSW sizes from 3/16" to 1/2", property class 45H (ISO 898-5, 450 HV minimum), supplied in zinc phosphate. The knurled cup point gives a hollow cup with a knurled edge that bites into the shaft and resists loosening under vibration. Set screws hold collars, pulleys, gears and couplings on shafts without a projecting head.

SFL's retail price list of October 2026 gives recommended retail list prices from Rs 340 to Rs 1,345 per 100 pieces across the listed sizes; the exact price for your sizes, lengths, point style 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 inch BSW (the table lists BSW only; BSF, UNC and UNF set screws are quoted on enquiry).
• The size you need is within 3/16" to 1/2".
• You want to hold a collar, pulley, gear or coupling on a shaft with no projecting head.
• The point style suits the job: a knurled cup point gives the best grip on a plain shaft under vibration.

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 zinc phosphate (grey/black) finish. A few sizes are shown; ask us for any other size in the range.

• 3/16" x 5/8" BSW: Rs 405 per 100 pieces
• 1/4" x 3/4" BSW: Rs 455 per 100 pieces
• 5/16" x 1-1/4" BSW: Rs 775 per 100 pieces
• 3/8" x 1-1/4" BSW: Rs 990 per 100 pieces
• 1/2" x 1-1/4" BSW: Rs 1,345 per 100 pieces
• Zinc phosphate (grey/black) finish

At a glance

• Brand: TVS Sundram Fasteners (Sundram Fasteners Limited, TVS group)
• Product: Socket Set Screws, knurled cup point, BSW
• Standard: BS 2470
• Sizes: 3/16" to 1/2"
• Drive: Hexagon socket
• Thread: Fully Threaded
• Hardness: 45H
• Material: Steel
• Surface finish: zinc phosphate
• Forging: cold forging
• List price: Rs 340 - 1,345 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: BS 2470
• Material: steel, hardened to class 45H (ISO 898-5, 450 HV minimum); BS 2470 dimensions
• Hardness: 45H
• Surface finish options: zinc phosphate
• Manufacture: cold forging
• 3/16": 24 tpi; socket 2.38 mm; key engagement 1.90 mm; lengths 1/4" to 5/8"
• 1/4": 20 tpi; socket 3.17 mm; key engagement 2.54 mm; lengths 1/4" to 1-1/4"
• 5/16": 18 tpi; socket 3.97 mm; key engagement 3.17 mm; lengths 5/16" to 1-1/4"
• 3/8": 16 tpi; socket 4.76 mm; key engagement 3.81 mm; lengths 5/16" to 1-1/4"
• 1/2": 12 tpi; socket 6.35 mm; key engagement 5.08 mm; lengths 1/2" to 1-1/4"
• 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 - BS 2470 - with the dimensions published in SFL's technical catalogue, so parts interchange with any other maker's to the same standard.

How to choose and fit

1. Drill and tap the hub for the set screw size.
2. Choose the length so that the screw sits just below the surface of the hub when tightened.
3. Tighten with a hex key of the exact size shown in the table; check the key engagement figure for short screws.

Where it is used

• collars, pulleys and sheaves on shafts
• gears, sprockets and couplings
• knobs and handwheels
• conveyor rollers and drive components
• older British-standard machinery, textile and mill equipment

Other versions and series

• TVS Sundram Fasteners Socket Set Screws, flat point, ISO 4026 - M3 to M12, list price Rs 450 - 1,980 per 100
• TVS Sundram Fasteners Socket Set Screws, cone point, ISO 4027 - M3 to M12, list price Rs 450 - 1,980 per 100
• TVS Sundram Fasteners Socket Set Screws, dog point, ISO 4028 - M3 to M12, list price Rs 450 - 1,980 per 100
• TVS Sundram Fasteners Socket Set Screws, knurled cup point, ISO 4029 - M3 to M12, list price Rs 310 - 1,385 per 100

Related products

• TVS Sundram Fasteners Hex Socket Keys, inch standard length - the keys that drive them
• TVS Sundram Fasteners Socket Head Cap Screws, inch BSW/BSF - screws with the same hexagon sockets

Frequently asked questions

What is the price of Socket Set Screws, knurled cup point, BSW?

SFL's recommended retail list price effective 1 October 2026 runs from Rs 340 to Rs 1,345 per 100 pieces across the listed sizes, for the zinc phosphate (grey/black) 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 non-listed lengths are quoted on enquiry.

Which point style should I use?

Flat point where the screw is adjusted often and must not mark the shaft; cone point for a permanent setting into a drilled dimple; dog point to locate in a slot or hole; knurled cup point for the strongest grip on a plain shaft under vibration.

Are TVS Socket Set Screws, knurled cup point, BSW 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 finish is zinc phosphate; 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, lengths, point style, finish and quantity of Socket Set Screws, knurled cup point, BSW you need. SFL's list price is Rs 340 - 1,345 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.