Description
Sutton Tools
Sutton HSS Hand Tap — 8-32 UNC Bottoming
Part No: T4160417 | Barcode: 9311963013282 | Brand: Sutton Tools
Sutton premium high-speed steel hand tap for cutting internal threads in steel, cast iron, brass, aluminium and most engineering metals. Ground from solid HSS with a bright finish and ISO529 straight flutes for accurate, repeatable threads. This 8-32 UNC Bottoming variant covers the UNC (Unified Coarse) thread standard — American Unified Coarse 60° thread — the dominant imperial standard in US-built machinery, automotive and industrial fasteners.
HSS Material
Ground From Solid
ISO529 Straight Flute
Bright Finish
6H Tolerance
Hand or Machine Use
Key Features & Benefits
- M2 High-Speed Steel construction — long edge life cutting steel up to 1000 N/mm² without premature dulling.
- Ground from solid — Sutton’s signature ground-from-solid process delivers concentric flutes and consistent thread form.
- ISO529 straight flute — industry-standard geometry suits both hand tapping and powered use in most engineering metals.
- 6H tolerance class — produces a class-fit thread that mates accurately with standard fasteners.
- Australian made — manufactured at Sutton’s Thomastown plant — same family business that has supplied Australian trades since 1917.
When to Use This HSS Hand Tap
Use this tap when cutting accurate threads in tougher engineering metals — mild and tool steels, stainless, cast iron, brass, aluminium and bronze — where carbon-steel taps would dull quickly. The taper lead-in makes it the natural starter tap; follow with the intermediate (second) and bottoming (plug) tap from the same series for blind holes. This particular variant (T4160417) cuts a 8-32 UNC Bottoming thread.
Pro Tip: Use a quality cutting fluid (Sutton recommends sulphurised oil for steels and a wax stick or kerosene for aluminium) and back the tap off a quarter-turn every one to two full turns to break the chip — this prevents heat build-up and stops the flutes packing up in deeper holes.
Authorised Sutton Tools Dealer — This product is sourced directly from Sutton Tools Australia, an Australian-owned family business manufacturing cutting tools in Thomastown, Victoria since 1917, and is backed by full Australian manufacturer warranty and local support.
Product Specifications
| Part No. | Size / Pitch | Thread | Form | Barcode |
|---|---|---|---|---|
| T4140351 | #6-32 | UNC | Taper | 9311963011417 |
| T4140417 | 8-32 | UNC | Taper | 9311963012582 |
| T4140483 | #10-24 | UNC | Taper | 9311963015729 |
| T4140635 | 1/4-20 | UNC | Taper | 9311963005362 |
| T4140794 | 5/16-18 | UNC | Taper | 9311963006833 |
| T4140953 | 3/8-16 | UNC | Taper | 9311963004648 |
| T4141111 | 7/16-14 | UNC | Taper | 9311963015736 |
| T4141270 | 1/2-13 | UNC | Taper | 9311963008332 |
| T4141588 | 5/8 | UNC | Taper | 9311963013961 |
| T4141905 | 3/4-10 | UNC | Taper | 9311963010069 |
| T4150351 | #6-32 | UNC | Intermediate | 9311963007328 |
| T4150417 | 8-32 | UNC | Intermediate | 9311963014814 |
| T4150483 | #10-24 | UNC | Intermediate | 9311963009230 |
| T4150635 | 1/4-20 | UNC | Intermediate | 9311963005904 |
| T4150794 | 5/16-18 | UNC | Intermediate | 9311963004266 |
| T4150953 | 3/8-16 | UNC | Intermediate | 9311963006116 |
| T4151111 | 7/16-14 | UNC | Intermediate | 9311963008851 |
| T4151270 | 1/2-13 | UNC | Intermediate | 9311963007335 |
| T4151429 | 9/16-12 | UNC | Intermediate | 9311963025896 |
| T4151588 | 5/8-11 | UNC | Intermediate | 9311963006123 |
| T4151905 | 3/4-10 | UNC | Intermediate | 9311963008349 |
| T4160351 | #6-32 | UNC | Bottoming | 9311963008547 |
| T4160417 ★ | 8-32 | UNC | Bottoming | 9311963013282 |
| T4160483 | #10-24 | UNC | Bottoming | 9311963008325 |
| T4160636 | 1/4-20 | UNC | Bottoming | 9311963002897 |
| T4160794 | 5/16-18 | UNC | Bottoming | 9311963033884 |
| T4160953 | 3/8-16 | UNC | Bottoming | 9311963004358 |
| T4161111 | 7/16-14 | UNC | Bottoming | 9311963006550 |
| T4161270 | 1/2-13 | UNC | Bottoming | 9311963005911 |
| T4161429 | 9/16-12 | UNC | Bottoming | 9311963019437 |
| T4161588 | 5/8-11 | UNC | Bottoming | 9311963010458 |
| T4161905 | 3/4-10 | UNC | Bottoming | 9311963009667 |
★ You are viewing the highlighted variant. Other sizes in this series are also available.
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