We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

OSG Spiral Flute Tap: M8x1 Metric, D5 / 4H-6H, 3 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: M8x1 Metric, D5 / 4H-6H, 3 Flute

The OSG Spiral Flute Tap (M8x1 Metric, MPN 2991308) is a general-purpose spiral-flute tap with a D5 / 4H-6H tolerance, 3 flutes, and a modified bottoming chamfer. 3G Electric interprets your demand for this specific…

SKU 3G-OTH-230232

Brand
OSG
Item
Spiral Flute Tap: M8x1 Metric, D5 / 4H-6H, 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

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OSG
Manufacturer Part Number
2991308
Type
D5 / 4H-6H, 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 (M8x1 Metric, MPN 2991308) is a general-purpose spiral-flute tap with a D5 / 4H-6H tolerance, 3 flutes, and a modified bottoming chamfer. 3G Electric interprets your demand for this specific OSG threading tool and delivers it with specialist sourcing support across 14 industrial departments.

Frequently Asked Questions

What is an OSG spiral flute tap used for?

An OSG spiral flute tap is used for threading blind holes in materials such as steel, stainless steel, and aluminum. Its spiral design pulls chips upward and out of the hole, preventing clogging and ensuring clean threads. This M8x1 metric tap with a modified bottoming chamfer is ideal for threading close to the bottom of a blind hole.

What are the specifications of the OSG 2991308 tap?

The OSG 2991308 is a spiral flute tap with M8x1 metric thread, D5 / 4H-6H tolerance, 3 flutes, and a modified bottoming chamfer. It is designed for general purpose threading of blind holes in a range of materials. The D5 / 4H-6H designation indicates a precision ground thread form for accurate fit.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps, including the 2991308 spiral flute tap, to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine OSG cutting tools and support your procurement with technical guidance on thread tolerances and material compatibility.

How to select the right OSG tap for blind holes?

For blind holes, choose a spiral flute tap like the OSG 2991308 to evacuate chips upward. Match the tap's thread size (M8x1), tolerance class (D5 / 4H-6H), and chamfer type (modified bottoming) to your hole depth and material. Consult the manufacturer's speed and feed recommendations for optimal thread quality and tool life.

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: M8x1 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991300)
OSG
OSG Spiral Flute Tap: M8x1 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991300)
OSG Spiral Flute Tap: M7x1 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991100)
OSG
OSG Spiral Flute Tap: M7x1 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991100)
OSG Spiral Flute Tap: M3.5x0.6 Metric, D4 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2990508)
OSG
OSG Spiral Flute Tap: M3.5x0.6 Metric, D4 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2990508)
OSG Spiral Flute Tap: M10x1.25 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991708)
OSG
OSG Spiral Flute Tap: M10x1.25 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991708)
OSG Spiral Flute Tap: M7x1 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991108)
OSG
OSG Spiral Flute Tap: M7x1 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991108)
OSG Spiral Flute Tap: M3.5x0.6 Metric, D4 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2990500)
OSG
OSG Spiral Flute Tap: M3.5x0.6 Metric, D4 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2990500)

More from OSG

View all OSG parts
OSG Spiral Flute Tap: M6x1 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991008)
OSG
OSG Spiral Flute Tap: M6x1 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2991008)
OSG Spiral Flute Tap: M12x1.5 Metric, D6 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2992208)
OSG
OSG Spiral Flute Tap: M12x1.5 Metric, D6 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2992208)
OSG Spiral Flute Tap: 5/8"-18 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer, High Speed Steel (MPN 1433300)
OSG
OSG Spiral Flute Tap: 5/8"-18 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer, High Speed Steel (MPN 1433300)
OSG Spiral Flute Tap: M12x1.25 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2992100)
OSG
OSG Spiral Flute Tap: M12x1.25 Metric, D5 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2992100)
OSG Spiral Flute Tap: 1/4"-20 UNC, H7 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2940208)
OSG
OSG Spiral Flute Tap: 1/4"-20 UNC, H7 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2940208)
OSG Spiral Flute Tap: #6-32 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1412400)
OSG
OSG Spiral Flute Tap: #6-32 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1412400)
OSG Spiral Flute Tap: M12x1.75 Metric, D6 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2992308)
OSG
OSG Spiral Flute Tap: M12x1.75 Metric, D6 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2992308)
OSG Spiral Flute Tap: #8-32 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2912800)
OSG
OSG Spiral Flute Tap: #8-32 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2912800)