Dormer Threading Tap, UNC 0.25 inch - 20 TPI Thread, UNC Standard, Hand Tap

View all Threading Taps

Subtotal (1 unit)*

SGD5.60

(exc. GST)

SGD6.10

(inc. GST)

Add to Basket
Select or type quantity
Temporarily out of stock
  • Shipping from 09 February 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
1 +SGD5.60

*price indicative

RS Stock No.:
625-506
Mfr. Part No.:
E559UNC1/4NO3
Manufacturer:
Dormer
Find similar products by selecting one or more attributes.
Select all

Brand

Dormer

Thread Size

UNC 0.25 inch - 20 TPI

Product Type

Threading Tap

Sub Type

Straight Flute

Thread Standard

UNC

Thread Direction

Right Hand

Overall Length

66mm

Material

HSS

Hand/Machine Tap

Hand Tap

Shank Diameter

5mm

Finish

Bright

Standards/Approvals

DIN ISO

RoHS Status: Exempt

COO (Country of Origin):
IN
The Dormer Straight Flute Bottoming Lead Hand Tap is a UNC-threaded tool built to ISO standards, ideal for tapping medium-strength carbon and alloy steels. It features a bottoming lead, which, while more difficult to start, allows threading nearly to the bottom of a blind hole. Best used as a machine tap or, when used by hand, in sequence after a taper and plug lead tap or a starter and intermediate serial tap for optimal results.

ISO standard

High speed steel tool material

Straight flute geometry

Related links