Headless Bristol/Allen Set Screw UNC Stainless 304-A2 Bsc Stainless UNC in stainless steel, inch thread. 60 sizes available; sold by unit.
| SKU | Size | Price | Status | Qty | |
|---|---|---|---|---|---|
| VT-24527 | 1/8 X 3/16 | $ 77 | In stock | ||
| VT-24529 | 1/8 X 5/16 | $ 77 | In stock | ||
| VT-24530 | 1/8 X 3/8 | $ 90 | In stock | ||
| VT-24531 | 1/8 X 1/2 | $ 103 | In stock | ||
| VT-24532 | 1/8 X 5/8 | $ 131 | In stock | ||
| VT-24533 | 5/32 X 1/8 | $ 150 | In stock | ||
| VT-24534 | 5/32 X 3/16 | $ 221 | In stock | ||
| VT-24535 | 5/32 X 1/4 | $ 251 | In stock | ||
| VT-24536 | 5/32 X 5/16 | $ 278 | In stock | ||
| VT-24537 | 5/32 X 3/8 | $ 308 | In stock | ||
| VT-24538 | 5/32 X 1/2 | $ 414 | In stock | ||
| VT-24539 | 5/32 X 5/8 | $ 553 | In stock | ||
| VT-24540 | 5/32 X 3/4 | $ 512 | In stock | ||
| VT-24541 | 5/32 X 1 | $ 684 | In stock | ||
| VT-24542 | 3/16 X 3/16 | $ 92 | In stock | ||
| VT-24543 | 3/16 X 1/4 | $ 124 | In stock | ||
| VT-24544 | 3/16 X 5/16 | $ 154 | In stock | ||
| VT-24545 | 3/16 X 3/8 | $ 150 | In stock | ||
| VT-24546 | 3/16 X 1/2 | $ 142 | In stock | ||
| VT-24547 | 3/16 X 5/8 | $ 180 | In stock | ||
| VT-24548 | 3/16 X 3/4 | $ 221 | In stock | ||
| VT-24549 | 3/16 X 1 | $ 448 | In stock | ||
| VT-24550 | 3/16 X 1.1/4" | $ 622 | In stock | ||
| VT-24551 | 3/16 X 1.1/2" | $ 703 | In stock | ||
| VT-24552 | 3/16 X 2 | $ 926 | In stock | ||
| VT-24553 | 1/4 X 1/4" | $ 138 | In stock | ||
| VT-24554 | 1/4 X 5/16 | $ 164 | In stock | ||
| VT-24555 | 1/4 X 3/8 | $ 172 | In stock | ||
| VT-24556 | 1/4 X 1/2 | $ 227 | In stock | ||
| VT-24557 | 1/4 X 5/8 | $ 142 | In stock | ||
| VT-24558 | 1/4 X 3/4 | $ 356 | In stock | ||
| VT-24559 | 1/4 X 1 | $ 497 | In stock | ||
| VT-24561 | 1/4 X 1.1/2 | $ 960 | In stock | ||
| VT-24562 | 1/4 X 2 | $ 1.252 | In stock | ||
| VT-24563 | 5/16 X 1/4 | $ 229 | In stock | ||
| VT-24564 | 5/16 X 5/16 | $ 354 | In stock | ||
| VT-24565 | 5/16 X 3/8 | $ 416 | In stock | ||
| VT-24566 | 5/16 X 1/2 | $ 546 | In stock | ||
| VT-24567 | 5/16 X 5/8 | $ 613 | In stock | ||
| VT-24568 | 5/16 X 3/4 | $ 855 | In stock | ||
| VT-24569 | 5/16 X 1 | $ 998 | In stock | ||
| VT-24570 | 5/16 X 1.1/4 | $ 1.416 | In stock | ||
| VT-24571 | 5/16 X 1.1/2 | $ 1.365 | In stock | ||
| VT-24572 | 3/8 X 5/16 | $ 412 | In stock | ||
| VT-24573 | 3/8 X 3/8 | $ 493 | In stock | ||
| VT-24574 | 3/8 X 1/2 | $ 737 | In stock | ||
| VT-24575 | 3/8 X 5/8 | $ 928 | In stock | ||
| VT-24576 | 3/8 X 3/4 | $ 1.129 | In stock | ||
| VT-24577 | 3/8 X 1 | $ 1.356 | In stock | ||
| VT-24578 | 3/8 X 1.1/4 | $ 1.609 | In stock | ||
| VT-24579 | 3/8 X 1.1/2 | $ 2.021 | In stock | ||
| VT-24580 | 3/8 X 2 | $ 2.798 | In stock | ||
| VT-24581 | 1/2 X 3/8 | $ 1.656 | In stock | ||
| VT-24582 | 1/2 X 1/2 | $ 2.179 | In stock | ||
| VT-24583 | 1/2 X 5/8 | $ 2.788 | In stock | ||
| VT-24584 | 1/2 X 3/4 | $ 3.396 | In stock | ||
| VT-24585 | 1/2 X 1 | $ 4.361 | In stock | ||
| VT-24586 | 1/2 X 1.1/4 | $ 6.454 | In stock | ||
| VT-24587 | 1/2 X 1.1/2 | $ 7.665 | In stock | ||
| VT-24588 | 1/2 X 2 | $ 10.099 | In stock |
Prices per unit, before VAT. Availability is confirmed in the formal quote.
| Material | acero inoxidable |
| Thread system | pulgadas |
| Family | Socket head cap screws & set screws |
The headless Bristol/Allen set screw is an industrial fastening element with Bristol or Allen drive, used in hidden fastening, set screws, shafts, pulleys, and component adjustment. TECTUL offers it in 304-A2 stainless steel, UNC inch thread, and UNC thread reference when applicable to the product design. Selection must start from the thread, usable length, head type, and compatibility with the existing threaded part or nut. It differs from a Bristol socket head cap screw because it remains embedded or flush, without protruding from the part. For this lot there are actual sizes such as 1/2 X 1 to 3/16 X 1.1/2, sold by unit. It is an option for maintenance, fabrication, equipment assembly, spare parts, and assemblies where precise, removable fastening with good tool access is required.
| Actual lot size | Sales unit |
|---|---|
| 1/2 X 1 | unit |
| 1/2 X 1.1/2 | unit |
| 1/2 X 1.1/4 | unit |
| 1/2 X 1/2 | unit |
| 1/2 X 2 | unit |
| 1/2 X 3/4 | unit |
| 1/2 X 3/8 | unit |
| 1/2 X 5/8 | unit |
| 1/4 X 1 | unit |
| 1/4 X 1.1/2 | unit |
| 1/4 X 1/2 | unit |
| 1/4 X 1/4 | unit |
| 1/4 X 2 | unit |
| 1/4 X 3/4 | unit |
| 1/4 X 3/8 | unit |
| 1/4 X 5/16 | unit |
| 1/4 X 5/8 | unit |
| 1/8 X 1/2 | unit |
| 1/8 X 3/16 | unit |
| 1/8 X 3/8 | unit |
| 1/8 X 5/16 | unit |
| 1/8 X 5/8 | unit |
| 3/16 X 1 | unit |
| 3/16 X 1.1/2 | unit |
We dispatch to Bogotá, Medellín, Cali, Barranquilla, and all of Colombia. Request a quote via WhatsApp for the headless Bristol/Allen set screw, indicating size, thread, material, quantity, and whether you need equivalence with DIN, ISO, or inch thread.
The price depends on the size, material, thread, standard, and requested quantity. Send us the exact reference via WhatsApp and TECTUL will quote according to lot availability.
Compared with a Bristol socket head cap screw, this format works as a set screw and leaves no external head; it is chosen to secure shafts, pulleys, or parts where the screw must remain hidden.
It is installed with a Bristol/Allen key or compatible tool, verifying thread pitch, available depth, head or tip seating, and the torque defined by the joint design.
This page corresponds to 304-A2 stainless steel with UNC inch thread. The standard reference indicated for selection is UNC thread when applicable.
You can quote the sizes listed in the product technical table. If you need an unpublished length, confirm availability with the sales team.
304-A2 stainless steel improves performance against moisture and moderate corrosion, but final compatibility depends on the environment, chemicals, and maintenance.
Metric Stainless 304-A2 DIN 912 Socket Head Cap Screw BccBristol/Allen Countersunk Head Screw Metric Stainless 304 DIN 7991 BcpBristol/Allen Socket Head Cap Screw Stainless UNC 304-A2 Bcc StainlessBristol/Allen Countersunk Head Screw UNC Stainless 304-A2 Bcp Stainless UNCBristol/Allen Round Head Screw Metric Stainless Button 304 ISO 7380Headless Bristol/Allen Set Screw Metric Stainless 304-A2 DIN 913 Bsc Stainless MetricUpdated: July 22, 2026
