NTM TL574219A SC Port 1/4-28 Solid Carbide Contour Tool
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The NTM Inc. TL574219A (REV A) is a new, solid carbide (SC) port contour tool designed to finish-machine SAE/O-ring boss port seats to the 1/4-28 UNF thread standard, producing the precise conical seat and face geometry required for leak-free O-ring face seal (ORFS) or straight-thread O-ring boss (SAE J1926) hydraulic port connections. Manufactured in the USA by NTM Inc. (One Stop Tooling and Machine Shop), the body features a dark oxide/nitride coating on the shank for corrosion protection while the cutting geometry is left uncoated ground carbide, with the characteristic pilot pin, flat-face cutting lands, and angled contour relieved flutes visible in the photos. The tool is cataloged under NTM part number TL574219A with GM/OEM internal reference 12563318, indicating use in production or MRO machining of hydraulic manifolds, valve bodies, and housings where 1/4-28 SAE straight-thread port seats must be generated or re-faced to specification.
Product Specifications
| Brand | NTM Inc. |
| Part Number | TL574219A |
| Revision | REV A |
| OEM/Cross Reference # | 12563318 |
| Tool Type | Port Contour Tool |
| Port Thread Size | 1/4-28 UNF |
| Port Standard | SAE Straight-Thread O-Ring Boss (SAE J1926) |
| Material | Solid Carbide (SC) |
| Shank Treatment | Dark oxide/nitride coating |
| Country of Origin | USA |
| Condition | New |