Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

OSG Spiral Flute Tap: 1/4"-28 UNF, H2 / 2B-3B, 3 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: 1/4"-28 UNF, H2 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (1/4"-28 UNF, MPN 2930301) is a general-purpose spiral-flute tap with an H2 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. 3G Electric interprets demand and sources this…

SKU 3G-OTH-230995

Brand
OSG
Item
Spiral Flute Tap: 1/4"-28 UNF, H2 / 2B-3B, 3 Flute
Category
General Purpose Spiral-Flute Taps
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

OSG
Manufacturer Part Number
2930301
Type
H2 / 2B-3B, Modified Bottoming Chamfer
Flute
3

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Spiral Flute Tap (1/4"-28 UNF, MPN 2930301) is a general-purpose spiral-flute tap with an H2 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. 3G Electric interprets demand and sources this genuine industrial cutting tool across 14 departments — with specialist depth in combustion, pumps, and controls — ensuring you get the right answer, not just a catalog.

Frequently Asked Questions

What is the OSG spiral flute tap 1/4-28 UNF used for?

This OSG spiral flute tap is designed for threading blind holes in materials such as steel and stainless steel. Its modified bottoming chamfer allows threading close to the bottom of the hole, while the spiral flute design efficiently evacuates chips upward, reducing the risk of tap breakage.

What are the specifications of the OSG tap 2930301?

The OSG tap 2930301 is a 1/4-28 UNF spiral flute tap with 3 flutes, a modified bottoming chamfer, and a thread tolerance of H2 / 2B-3B. It is a general-purpose tap suitable for producing threads in blind holes, with a 1/4-inch nominal diameter and 28 threads per inch.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps like the 2930301 to customers worldwide. We handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this spiral flute tap, and we will source it for your industrial threading application.

How to select the correct OSG tap for blind holes?

For blind holes, choose a spiral flute tap like this OSG 1/4-28 UNF model, which pushes chips upward and out of the hole. Ensure the chamfer type matches your depth requirement—modified bottoming chamfer allows threading close to the hole bottom. Always match the tap tolerance (H2 / 2B-3B) to your desired thread class.

Used in

Common applications for OSG
Automotive engine block production — OSG micro drill bits for oil gallery and coolant passage drilling in cast iron
Medical device manufacturing — OSG micro drill bits for drilling bone screw pilot holes in stainless steel implants
Aerospace component machining — OSG micro drill bits for fastener holes in titanium alloy structural parts
Mold and die making — OSG micro drill bits for cooling channel drilling in hardened tool steel (HRC 45-50)
Electronics enclosure fabrication — OSG micro drill bits for precision holes in aluminum alloy housings (with appropriate coating selection)
General engineering job shops — OSG micro drill bits for small-diameter hole drilling in mild steel and alloy steel parts

OSG Products

3G Electric supplies OSG general purpose spiral-flute taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
OSG Spiral Flute Tap: 1/4"-28 UNF, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930308)
OSG
OSG Spiral Flute Tap: 1/4"-28 UNF, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930308)
OSG Spiral Flute Tap: 1/4"-28 UNF, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930300)
OSG
OSG Spiral Flute Tap: 1/4"-28 UNF, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930300)
OSG Spiral Flute Tap: 3/8"-24 UNF, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2926800)
OSG
OSG Spiral Flute Tap: 3/8"-24 UNF, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2926800)
OSG Spiral Flute Tap: 1/4"-28 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 1430308)
OSG
OSG Spiral Flute Tap: 1/4"-28 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 1430308)
OSG Spiral Flute Tap: 1/4"-20 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2928008)
OSG
OSG Spiral Flute Tap: 1/4"-20 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2928008)
OSG Spiral Flute Tap: 3/8"-24 UNF, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2926801)
OSG
OSG Spiral Flute Tap: 3/8"-24 UNF, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2926801)

More from OSG

View all OSG parts
General purpose spiral-flute tap for threading blind holes. Features a 2-flute design with plug chamfer and black oxide finish on high speed steel. Suitable for ferrous and non-ferrous materials, lifting chips upward to prevent clogging. Tolerance H2 / 2B-3B
OSG
General purpose spiral-flute tap for threading blind holes. Features a 2-flute design with plug chamfer and black oxide finish on high speed steel. Suitable for ferrous and non-ferrous materials, lifting chips upward to prevent clogging. Tolerance H2 / 2B-3B
General purpose spiral-flute tap with 7/16"-20 UNF thread, H7 / 2B-3B tolerance class, modified bottoming chamfer, and 3 flutes. Designed for threading blind holes in ferrous and non-ferrous materials, the spiral flute lifts chips upward to prevent clogging. Suitable for through-hole and blind-hole applications requiring chip evacuation
OSG
General purpose spiral-flute tap with 7/16"-20 UNF thread, H7 / 2B-3B tolerance class, modified bottoming chamfer, and 3 flutes. Designed for threading blind holes in ferrous and non-ferrous materials, the spiral flute lifts chips upward to prevent clogging. Suitable for through-hole and blind-hole applications requiring chip evacuation
General purpose spiral-flute tap for threading blind holes. The spiral flute design evacuates chips upward, preventing clogging. Suitable for use in steel and stainless steel. Thread size: 5/16-24 UNF, tolerance H4 / 2B-3B, with modified bottoming chamfer and 3 flutes
OSG
General purpose spiral-flute tap for threading blind holes. The spiral flute design evacuates chips upward, preventing clogging. Suitable for use in steel and stainless steel. Thread size: 5/16-24 UNF, tolerance H4 / 2B-3B, with modified bottoming chamfer and 3 flutes
General purpose spiral-flute tap for threading blind holes. Features a TiCN coating on high speed steel for reduced friction and wear. Plug chamfer and 3-flute design aid chip evacuation upward. Thread size 7/16"-14 UNC, tolerance H3 / 2B-3B
OSG
General purpose spiral-flute tap for threading blind holes. Features a TiCN coating on high speed steel for reduced friction and wear. Plug chamfer and 3-flute design aid chip evacuation upward. Thread size 7/16"-14 UNC, tolerance H3 / 2B-3B
General purpose spiral-flute tap for threading blind holes. Spiral flute design lifts chips upward to prevent clogging. Suitable for steel, stainless steel, and aluminum. Thread size 5/8"-11 UNC, 2B class of fit, 4 flutes, modified bottoming chamfer
OSG
General purpose spiral-flute tap for threading blind holes. Spiral flute design lifts chips upward to prevent clogging. Suitable for steel, stainless steel, and aluminum. Thread size 5/8"-11 UNC, 2B class of fit, 4 flutes, modified bottoming chamfer
General purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. Features TiN coated high-speed steel construction, H3 / 2B-3B tolerance, plug chamfer, and 3 flutes. The spiral flute design evacuates chips upward, suitable for applications requiring chip clearance
OSG
General purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. Features TiN coated high-speed steel construction, H3 / 2B-3B tolerance, plug chamfer, and 3 flutes. The spiral flute design evacuates chips upward, suitable for applications requiring chip clearance
This spiral-flute tap is designed for threading blind holes in materials such as steel and aluminum. The spiral flute lifts chips upward, preventing clogging and ensuring clean threads. It features a modified bottoming chamfer for threading close to the bottom of blind holes. Suitable for general-purpose tapping in manufacturing and maintenance applications
OSG
This spiral-flute tap is designed for threading blind holes in materials such as steel and aluminum. The spiral flute lifts chips upward, preventing clogging and ensuring clean threads. It features a modified bottoming chamfer for threading close to the bottom of blind holes. Suitable for general-purpose tapping in manufacturing and maintenance applications
General-purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. Features M14x1.5 metric thread, D6 / 4H-6H tolerance, 3 flutes, and modified bottoming chamfer. Spiral flute design evacuates chips upward, suitable for deep or blind-hole tapping in general machining applications
OSG
General-purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. Features M14x1.5 metric thread, D6 / 4H-6H tolerance, 3 flutes, and modified bottoming chamfer. Spiral flute design evacuates chips upward, suitable for deep or blind-hole tapping in general machining applications