NPT and NPTF

Drill Bit

Plug Chamfer

Bottoming

Chamfer

Pipe

Size Thread

Type Threads

Per Inch Thread

Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Each Each

Uncoated High-Speed Steel

1/16 NPT 27 11/16" 2 1/8" C 0.242" 4 2525A171 $24.74 ______ __

1/16 NPTF 27 11/16" 2 1/8" C 0.242" 4 2525A211 24.74 ______ __

1/8 NPT 27 3/4" 2 1/8" Q 0.332" 4 2525A169 24.74 ______ __

1/8 NPT 27 3/4" 3" Q 0.332" 4 2538A41 34.16 ______ __

1/8 NPTF 27 3/4" 2 1/8" Q 0.332" 4 2525A213 24.74 ______ __

1/8 NPTF 27 3/4" 3" Q 0.332" 4 2538A11 34.16 ______ __

1/4 NPT 18 1 1/16" 2 7/16" 7/16" 0.4375" 4 2525A173 28.40 ______ __

1/4 NPT 18 1 1/16" 3 1/2" 7/16" 0.4375" 4 2538A42 38.28 ______ __

1/4 NPTF 18 1 1/16" 2 7/16" 7/16" 0.4375" 4 2525A214 28.40 ______ __

1/4 NPTF 18 1 1/16" 3 1/2" 7/16" 0.4375" 4 2538A12 38.28 ______ __

3/8 NPT 18 1 1/16" 2 9/16" 9/16" 0.5625" 4 2525A174 36.04 ______ __

3/8 NPT 18 1 1/16" 3 3/4" 9/16" 0.5625" 4 2538A43 50.23 ______ __

3/8 NPTF 18 1 1/16" 2 9/16" 9/16" 0.5625" 4 2525A215 36.04 ______ __

3/8 NPTF 18 1 1/16" 3 3/4" 9/16" 0.5625" 4 2538A13 50.23 ______ __

1/2 NPT 14 1 21/32" 3 1/8" 45/64" 0.7031" 4 2525A175 57.04 ______ __

1/2 NPT 14 1 3/8" 4 3/8" 45/64" 0.7031" 4 2538A44 80.17 ______ __

1/2 NPTF 14 1 21/32" 3 1/8" 45/64" 0.7031" 4 2525A216 57.04 ______ __

3/4 NPT 14 1 3/8" 3 1/4" 29/32" 0.9063" 5 2525A176 79.88 ______ __

3/4 NPT 14 1 3/8" 4 5/8" 29/32" 0.9063" 5 2538A45 107.65 ______ __

3/4 NPTF 14 1 3/8" 3 1/4" 29/32" 0.9063" 5 2525A217 79.88 ______ __

1 NPT 11 1/2 1 3/4" 3 3/4" 1 9/64" 1.1406" 5 2525A177 120.96 ______ __

1 NPT 11 1/2 1 3/4" 5 1/4" 1 9/64" 1.1406" 5 2538A46 162.85 ______ __

1 NPTF 11 1/2 1 3/4" 3 3/4" 1 9/64" 1.1406" 5 2525A218 120.96 ______ __

1 1/4 NPT 11 1/2 1 3/4" 4" 1 31/64" 1.4844" 5 2525A178 173.70 ______ __

1 1/4 NPTF 11 1/2 1 3/4" 4" 1 31/64" 1.4844" 5 2525A219 173.70 ______ __

1 1/2 NPT 11 1/2 3" 4 1/4" 1 23/32" 1.7188" 7 2525A179 233.04 ______ __

1 1/2 NPTF 11 1/2 3" 4 1/4" 1 23/32" 1.7188" 7 2525A221 233.04 ______ __

2 NPT 11 1/2 1 3/4" 4 1/4" 2 3/16" 2.1875" 7 2525A181 315.48 ______ __

2 NPTF 11 1/2 1 3/4" 4 1/4" 2 3/16" 2.1875" 7 2525A222 315.48 ______ __

2 1/2 NPT 8 2 9/16" 5 1/2" 2 39/64" 2.6094" 7 ______ __ 2525A182 $429.80

2 1/2 NPTF 8 2 9/16" 5 1/2" 2 39/64" 2.6094" 7 ______ __ 2525A223 429.80

Titanium Nitride (TiN) Coated High-Speed Steel

1/16 NPT 27 11/16" 2 1/8" C 0.242" 4 2652A41 31.74 ______ __

1/16 NPTF 27 11/16" 2 1/8" C 0.242" 4 2652A21 31.74 ______ __

1/8 NPT 27 3/4" 2 1/8" Q 0.332" 4 2652A11 31.74 ______ __

1/8 NPTF 27 3/4" 2 1/8" Q 0.332" 4 2652A12 31.74 ______ __

1/4 NPT 18 1 1/16" 2 7/16" 7/16" 0.4375" 4 2652A43 36.85 ______ __

1/4 NPTF 18 1 1/16" 2 7/16" 7/16" 0.4375" 4 2652A23 36.85 ______ __

3/8 NPT 18 1 1/16" 2 9/16" 9/16" 0.5625" 4 2652A44 46.71 ______ __

3/8 NPTF 18 1 1/16" 2 9/16" 9/16" 0.5625" 4 2652A24 46.71 ______ __

1/2 NPT 14 1 3/8" 3 1/8" 45/64" 0.7031" 4 2652A45 73.98 ______ __

1/2 NPTF 14 1 3/8" 3 1/8" 45/64" 0.7031" 4 2652A25 73.98 ______ __

3/4 NPT 14 1 3/8" 3 1/4" 29/32" 0.9063" 5 2652A46 103.59 ______ __

3/4 NPTF 14 1 3/8" 3 1/4" 29/32" 0.9063" 5 2652A26 103.59 ______ __

1 NPT 11 1/2 1 3/4" 3 3/4" 1 9/64" 1.1406" 5 2652A47 156.73 ______ __

1 NPTF 11 1/2 1 3/4" 3 3/4" 1 9/64" 1.1406" 5 2652A27 156.73 ______ __

1 1/4 NPT 11 1/2 1 3/4" 4" 1 31/64" 1.4844" 5 2652A48 259.84 ______ __

1 1/2 NPT 11 1/2 1 3/4" 4 1/4" 1 23/32" 1.7188" 7 2652A49 349.41 ______ __

2 NPT 11 1/2 1 3/4" 4 1/2" 2 3/16" 2.1875" 7 2652A51 474.76 ______ __

NPSM and NPSF

Drill Bit

Plug Chamfer

Pipe

Size Thread

Type Threads

Per Inch Thread

Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Each

Uncoated High-Speed Steel

1/8 NPSF 27 3/4" 2 1/8" R 0.339" 4 2526A41 $29.04

1/8 NPSM 27 3/4" 2 1/8" T 0.358" 4 2526A31 29.04

1/4 NPSF 18 1 1/16" 2 7/16" 7/16" 0.4375" 4 2526A43 32.25

1/4 NPSM 18 1 1/16" 2 7/16" 15/32" 0.4688" 4 2526A32 32.25

3/8 NPSF 18 1 1/16" 2 9/16" 37/64" 0.5781" 4 2526A44 42.17

3/8 NPSM 18 1 1/16" 2 9/16" 19/32" 0.5938" 4 2526A33 42.17

1/2 NPSF 14 1 21/32" 3 1/8" 18 mm 0.7087" 4 2526A45 67.26

1/2 NPSM 14 1 21/32" 3 1/8" 19 mm 0.748" 4 2526A34 67.26

3/4 NPSF 14 1 3/8" 3 1/4" 59/64" 0.9219" 5 2526A46 94.43

3/4 NPSM 14 1 3/8" 3 1/4" 61/64" 0.9531" 5 2526A35 94.43

1 NPSF 11 1/2 1 3/4" 3 3/4" 1 11/64" 1.1719" 5 2526A47 143.41

1 NPSM 11 1/2 1 3/4" 3 3/4" 1 13/64" 1.2031" 5 2526A36 143.41

Titanium Nitride (TiN) Coated High-Speed Steel

1/8 NPSM 27 3/4" 2 1/8" T 0.358" 4 4478N11 28.59

1/4 NPSM 18 1 1/16" 2 7/16" 15/32" 0.4688" 4 4478N12 32.19

3/8 NPSM 18 1 1/16" 2 9/16" 19/32" 0.5938" 4 4478N13 40.52

1/2 NPSM 14 1 21/32" 3 1/8" 19 mm 0.748" 4 4478N14 65.61

3/4 NPSM 14 1 3/8" 3 1/4" 61/64" 0.9531" 5 4478N15 90.62

1 NPSM 11 1/2 1 3/4" 3 3/4" 1 13/64" 1.2031" 5 4478N16 142.34

BSPP and BSPT

Drill Bit

Bottoming

Chamfer

Pipe

Size Thread

Type Threads

Per Inch Thread

Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Each

Uncoated High-Speed Steel

1/8 BSPP 28 3/4" 2 1/8" 8.8 mm 0.3464" 4 8328A21 $19.83

1/8 BSPT 28 3/4" 2 1/8" 8.4 mm 0.3307" 4 8328A11 19.83

1/4 BSPP 19 1 1/16" 2 7/16" 11.8 mm 0.4645" 4 8328A22 22.17

1/4 BSPT 19 1 1/16" 2 7/16" 11.2 mm 0.4409" 4 8328A12 22.17

3/8 BSPP 19 1 1/16" 2 9/16" 15 mm 0.5905" 4 8328A23 28.00

3/8 BSPT 19 1 1/16" 2 9/16" 14.5 mm 0.5709" 4 8328A13 28.00

1/2 BSPP 14 1 3/8" 3 1/8" 19 mm 0.748" 4 8328A24 44.33

1/2 BSPT 14 1 3/8" 3 1/8" 18 mm 0.7087" 4 8328A14 44.33

3/4 BSPP 14 1 3/8" 3 1/4" 24 mm 0.9449" 5 8328A25 61.83

3/4 BSPT 14 1 3/8" 3 1/4" 22 mm 0.8661" 5 8328A15 61.83

1 BSPP 11 1 3/4" 3 3/4" 30 mm 1.1811" 5 8328A26 94.50

1 BSPT 11 1 3/4" 3 3/4" 30 mm 1.1811" 5 8328A16 94.50

1 1/4 BSPP 11 1 3/4" 4" 39.5 mm 1.5551" 5 8328A27 137.67

1 1/4 BSPT 11 1 3/4" 4" 38.5 mm 1.5157" 5 8328A17 137.67

1 1/2 BSPP 11 1 3/4" 4 1/4" 45 mm 1.7716" 7 8328A28 183.17

1 1/2 BSPT 11 1 3/4" 4 1/4" 44.5 mm 1.7519" 7 8328A18 183.17

2 BSPP 11 1 3/4" 4 1/2" 57 mm 2.244" 7 8328A29 256.67

2 BSPT 11 1 3/4" 4 1/2" 56 mm 2.2047" 7 8328A19 256.67

Titanium Nitride (TiN) Coated High-Speed Steel

1/8 BSPP 28 3/4" 2 1/8" 8.8 mm 0.3464" 4 4478N17 19.40

1/8 BSPT 28 3/4" 2 1/8" 8.4 mm 0.3307" 4 4478N18 19.40

1/4 BSPP 19 1 1/16" 2 7/16" 11.8 mm 0.4645" 4 4478N19 21.84

1/4 BSPT 19 1 1/16" 2 7/16" 11.2 mm 0.4409" 4 4478N21 21.84

3/8 BSPP 19 1 1/16" 2 9/16" 15 mm 0.5905" 4 4478N22 27.41

3/8 BSPT 19 1 1/16" 2 9/16" 14.5 mm 0.5709" 4 4478N23 27.41

1/2 BSPP 14 1 3/8" 3 1/8" 19 mm 0.748" 4 4478N24 44.52

1/2 BSPT 14 1 3/8" 3 1/8" 18 mm 0.7087" 4 4478N25 44.52

3/4 BSPP 14 1 3/8" 3 1/4" 24 mm 0.9449" 4 4478N26 61.49

3/4 BSPT 14 1 3/8" 3 1/4" 22 mm 0.8661" 4 4478N27 61.49

1 BSPP 11 1 3/4" 3 3/4" 30 mm 1.1811" 6 4478N28 94.89

1 BSPT 11 1 3/4" 3 3/4" 30 mm 1.1811" 6 4478N29 94.89

1 1/4 BSPP 11 1 3/4" 4" 39.5 mm 1.5551" 6 4478N31 150.00

1 1/2 BSPP 11 1 3/4" 4 1/4" 45 mm 1.7716" 6 4478N32 222.20

Metric

Thread

Drill Bit

Bottoming

Chamfer

Size Pitch,

mm Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Each

Uncoated High-Speed Steel

M8 1 7/8" 2 1/4" 6.9 mm 0.2716" 4 1017N111 $60.00

M10 1 3/4" 2 1/4" 8.9 mm 0.3503" 4 1017N112 64.00

M12 1.5 7/8" 2 1/2" 10.2 mm 0.4015" 4 1017N113 76.00

M14 1.5 7/8" 2 3/4" 12.2 mm 0.4803" 4 1017N114 92.00

M16 1.5 7/8" 2 1/2" 14 mm 0.5512" 4 1017N115 98.00

M18 1.5 7/8" 3 3/8" 16 mm 0.6299" 4 1017N116 142.00

M20 1.5 7/8" 3 3/16" 18 mm 0.7087" 4 1017N117 162.00

M22 1.5 7/8" 3 3/16" 20 mm 0.7874" 4 1017N118 184.00