Bordo 1/4" x 18 NPT Bottoming Chrome Alloy Tap 4252-1/4B
Features: NPT - National Pipe Tapered; NPT is a US standard for tapered threads used to join pipes and fittings. ; ANSI/ASME standard B1.20.1 covers threads of 60 form with flat crests and roots. ; The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other. ; However a clearance remains between the crests and roots of the threads, resulting in a leakage around this spiral. ; This means that NPT fittings must be made leak free with the aid of thread seal tape or a thread sealant compound. ; For each 12" increase in distance from the end, the diameter increases by 3/4". ; BOTTOMING TAPS have a lead of two threads and are used to ensure minimum thread run-out when tapping to the bottom of a blind hole. Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. ; Specifications:Diameter1/4"Pitch18 tpiLeadBottomingOverall Length62 mmTapping Drill11.1 mm
Features: NPT - National Pipe Tapered; NPT is a US standard for tapered threads used to join pipes and fittings. ; ANSI/ASME standard B1.20.1 covers threads of 60 form with flat crests and roots. ; The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other. ; However a clearance remains between the crests and roots of the threads, resulting in a leakage around this spiral. ; This means that NPT fittings must be made leak free with the aid of thread seal tape or a thread sealant compound. ; For each 12" increase in distance from the end, the diameter increases by 3/4". ; BOTTOMING TAPS have a lead of two threads and are used to ensure minimum thread run-out when tapping to the bottom of a blind hole. Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. ; Specifications:Diameter1/4"Pitch18 tpiLeadBottomingOverall Length62 mmTapping Drill11.1 mm
Features: NPT - National Pipe Tapered; NPT is a US standard for tapered threads used to join pipes and fittings. ; ANSI/ASME standard B1.20.1 covers threads of 60 form with flat crests and roots. ; The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other. ; However a clearance remains between the crests and roots of the threads, resulting in a leakage around this spiral. ; This means that NPT fittings must be made leak free with the aid of thread seal tape or a thread sealant compound. ; For each 12" increase in distance from the end, the diameter increases by 3/4". ; BOTTOMING TAPS have a lead of two threads and are used to ensure minimum thread run-out when tapping to the bottom of a blind hole. Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. ; Specifications:Diameter1/4"Pitch18 tpiLeadBottomingOverall Length62 mmTapping Drill11.1 mm
Features: NPT - National Pipe Tapered; NPT is a US standard for tapered threads used to join pipes and fittings. ; ANSI/ASME standard B1.20.1 covers threads of 60 form with flat crests and roots. ; The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other. ; However a clearance remains between the crests and roots of the threads, resulting in a leakage around this spiral. ; This means that NPT fittings must be made leak free with the aid of thread seal tape or a thread sealant compound. ; For each 12" increase in distance from the end, the diameter increases by 3/4". ; BOTTOMING TAPS have a lead of two threads and are used to ensure minimum thread run-out when tapping to the bottom of a blind hole. Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. ; Specifications:Diameter1/4"Pitch18 tpiLeadBottomingOverall Length62 mmTapping Drill11.1 mm
in 3 offers
The lowest price for Bordo 1/4" x 18 NPT Bottoming Chrome Alloy Tap 4252-1/4B right now is $51.41 at Industrial Shed, compared across 3 retailers.
The all-time low was $27.32 on 24 July 2025 — today's price is 88% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 11 May 2026.
Last updated at 11/05/2026 09:43:46
Bordo - 1/4 NPT Chrome Alloy Tap - Bottoming | 4252-1/4B
Delivery between 12–20 May $7.95
Bordo Hand Tap Chrome NPT Bottoming 1/4"x18 - 4252-1/4B - Tool Kit Depot
Delivery between 18–21 May $10
Bordo 4252-1/4B 1/4" x 18TPI NPT Bottoming Chrome Alloy Tap
Delivery $9.70
| Diameter | 1/4" |
| Pitch | 18 tpi |
| Lead | Bottoming |
| Overall Length | 62 mm |
| Tapping Drill | 11.1 mm |
Bordo - 1/4 NPT Chrome Alloy Tap - Bottoming | 4252-1/4B
Delivery between 12–20 May $7.95
Bordo Hand Tap Chrome NPT Bottoming 1/4"x18 - 4252-1/4B - Tool Kit Depot
Delivery between 18–21 May $10
Bordo 4252-1/4B 1/4" x 18TPI NPT Bottoming Chrome Alloy Tap
Delivery $9.70
| Diameter | 1/4" |
| Pitch | 18 tpi |
| Lead | Bottoming |
| Overall Length | 62 mm |
| Tapping Drill | 11.1 mm |
