Spiral point tap in 27 inch sizes, #2-56 through 1"-8, in UNC and UNF threads. The standard version is M35 HSS-Co with 5% cobalt, TiN coated for wear, heat resistance and tool life. A spiral point — commonly called a gun tap — pushes chips forward, so it suits through holes; in a blind hole they have nowhere to escape. That is the difference from a spiral flute tap, which carries chips back out of the hole. Plug and spiral point describe two different things: plug is the 3-to-5-thread chamfer, spiral point the flute and chip-control geometry. Driving chips ahead of the cut and keeping the flutes clear is what makes it a machine tap, for CNC tapping and for drilling machines equipped to tap. Two flutes through 5/16", three from 3/8" up; H2 to H4 pitch diameter limits. M2, M42 and HSS-E, and TiAlN, TiCN or uncoated, are made to order.
| Cart+ | SKU | Price | Quantity | Total | Size | Flute Length | Type | Overall Length | Flutes | Chamfer | Pitch Dia Limit |
|---|---|---|---|---|---|---|---|---|---|---|---|
SPT-2-56 | $5 | $0 | 2-56 | 33/64″ | UNC | 1-7/8″ | 2 | Plug | H2 | ||
SPT-3-48 | $5 | $0 | 3-48 | 1/2″ | UNC | 1-7/8″ | 2 | Plug | H2 | ||
SPT-4-40 | $5 | $0 | 4-40 | 5/8″ | UNC | 2″ | 2 | Plug | H2 | ||
SPT-4-48 | $5 | $0 | 4-48 | 19/32″ | UNF | 1-15/16″ | 2 | Plug | H2 | ||
SPT-5-40 | $6 | $0 | 5-40 | 45/64″ | UNC | 2″ | 2 | Plug | H2 | ||
SPT-6-32 | $6 | $0 | 6-32 | 13/16″ | UNC | 2″ | 2 | Plug | H3 | ||
SPT-8-32 | $7 | $0 | 8-32 | 53/64″ | UNC | 2-3/16″ | 2 | Plug | H3 | ||
SPT-8-36 | $7 | $0 | 8-36 | 13/16″ | UNF | 2-3/16″ | 2 | Plug | H3 | ||
SPT-10-24 | $8 | $0 | 10-24 | 1-3/64″ | UNC | 2-9/16″ | 2 | Plug | H3 | ||
SPT-10-32 | $8 | $0 | 10-32 | 59/64″ | UNF | 2-5/8″ | 2 | Plug | H3 | ||
SPT-12-24 | $9 | $0 | 12-24 | 61/64″ | UNC | 2-11/16″ | 2 | Plug | H3 | ||
SPT-12-28 | $9 | $0 | 12-28 | 1-1/16″ | UNF | 2-1/2″ | 2 | Plug | H3 | ||
SPT-14-20 | $10 | $0 | 1/4″-20 | 1-9/64″ | UNC | 2-3/4″ | 2 | Plug | H3 | ||
SPT-14-28 | $10 | $0 | 1/4″-28 | 1-5/32″ | UNF | 2-3/4″ | 2 | Plug | H3 | ||
SPT-516-18 | $12 | $0 | 5/16″-18 | 1-23/64″ | UNC | 2-13/16″ | 2 | Plug | H3 | ||
SPT-516-24 | $12 | $0 | 5/16″-24 | 1-23/64″ | UNF | 2-13/16″ | 2 | Plug | H3 | ||
SPT-38-16 | $15 | $0 | 3/8″-16 | 1-9/32″ | UNC | 2-15/16″ | 3 | Plug | H3 | ||
SPT-38-24 | $15 | $0 | 3/8″-24 | 1-31/64″ | UNF | 3-1/8″ | 3 | Plug | H3 | ||
SPT-716-14 | $18 | $0 | 7/16″-14 | 1-29/64″ | UNC | 3-1/8″ | 3 | Plug | H3 | ||
SPT-716-20 | $18 | $0 | 7/16″-20 | 1-31/64″ | UNF | 3-1/8″ | 3 | Plug | H3 | ||
SPT-12-13 | $22 | $0 | 1/2″-13 | 1-11/16″ | UNC | 3-3/8″ | 3 | Plug | H3 | ||
SPT-12-20 | $22 | $0 | 1/2″-20 | 1-11/16″ | UNF | 3-3/8″ | 3 | Plug | H3 | ||
SPT-58-11 | $30 | $0 | 5/8″-11 | 1-27/32″ | UNC | 3-13/16″ | 3 | Plug | H3 | ||
SPT-58-18 | $30 | $0 | 5/8″-18 | 1-27/32″ | UNF | 3-13/16″ | 3 | Plug | H3 | ||
SPT-34-10 | $40 | $0 | 3/4″-10 | 2-3/64″ | UNC | 4-1/4″ | 3 | Plug | H4 | ||
SPT-78-9 | $50 | $0 | 7/8″-9 | 2-13/64″ | UNC | 4-5/16″ | 3 | Plug | H3 | ||
SPT-1-8 | $64 | $0 | 1″-8 | 2-5/16″ | UNC | 5-1/8″ | 3 | Plug | H4 |
M35 HSS-Co cobalt tap, 5% cobalt; TiN coating for wear and tool life
A machine tap for CNC tapping and drill press work, not for hand use
A through hole tap — the spiral point pushes chips forward
27 inch sizes, #2-56 to 1"-8, in UNC tap and UNF tap threads
Two flutes up to 5/16", three from 3/8" up
Plug chamfer, 3 to 5 threads
H2, H3 and H4 pitch diameter limits
Custom materials M2, M42, HSS-E on request
Custom coatings TiAlN, TiCN or uncoated on request
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