UNF Thread Mill

UNF Thread Milling Cutter Specifications

Item	Specification
Thread Standard	UNF (Unified National Fine Thread)
Thread Angle	60°
Tool Material	Ultra-fine Grain Solid Carbide
Coating	TiAlN / AlTiN / Uncoated
Tool Type	Single Tooth / 3-Tooth / Full Form
Common UNF Sizes	#4-48, #6-40, #8-36, #10-32, 1/4-28, 5/16-24, 3/8-24, 1/2-20, 5/8-18, 3/4-16
Max Machining Hardness	HRC 55

Applicable Materials

Stainless Steel: 304, 316, 410, duplex stainless steel
Carbon Steel & Alloy Steel: 45# steel, 40Cr, mold steel, pre-hardened steel
Non-Ferrous Metals: Aluminum alloy, copper, brass
Hardened Steel: Tempered steel up to HRC 55
Engineering Plastics: POM, PEEK, nylon precision parts

Application Scenarios

UNF fine threads are widely used in fields requiring high precision, anti-vibration and high fastening stability:

Aerospace & Military Parts: High-precision fine thread fasteners and structural components
Automotive Precision Components: Engine parts, sensor fittings, transmission fine thread parts
Hydraulic & Pneumatic Systems: High-precision valve connectors and sealing parts
Electronic & 3C Precision Products: Instrument shells, precision brackets, connectors
Mold & Precision Machinery: Fine thread mold inserts and high-tolerance mechanical parts

FAQ

Q1: What is the difference between UNF and UNC thread mills?
A1: UNF is fine thread with smaller pitch, higher precision, better anti-vibration and tighter fitting. UNC is coarse thread for general assembly. UNF is used for high-precision and high-stability connection scenarios.

Q2: Can UNF thread mills process both internal and external threads?
A2: Yes. Our UNF thread cutters support internal thread, external thread, left-hand and right-hand thread milling with one tool.

Q3: Why choose thread milling instead of tapping for UNF threads?
A3: UNF fine-pitch taps are extremely fragile and easy to break. Thread milling provides higher precision, smoother thread surface, zero breakage risk, and lower production loss.