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HS Round Dies, NC and NF

National Coarse Thread Adjustable Round Split Dies

High Speed Round Adjustable Dies. For cutting external threads.
Adjustment screw allows die to be set for different classes of fit.
Can be used to cut new threads or clean up existing threads.
Pitches not found in the listings for National Coarse thread dies or National Fine thread dies are listed as Special Pitch Dies.

Follow this link to see the corresponding Taps for these Dies.

Follow this link to explore our complete offering of taps, dies, and other threading tools.
Quantity Price Model Description Size Threads Per Inch O.D.

$11.40 RD-1-64-A
#1-64 DIE, RND ADJ HSS, 13/16" OD, 0535-0010 #1 64 13/16"

$11.40 RD-2-56-A
#2-56 DIE, RND ADJ HSS, 13/16" OD, 0535-0020 #2 56 13/16"

$11.40 RD-3-48-A
#3-48 DIE, RND ADJ HSS, 13/16" OD, 0535-0030 #3 48 13/16"

$11.40 RD-4-40-A
#4-40 DIE, RND ADJ HSS, 13/16" OD, 0535-0040 #4 40 13/16"

$7.75 RD-5-40-A
#5-40 DIE, RND ADJ HSS, 13/16" OD, 0535-0050 #5 40 13/16"

$7.75 RD-6-32-A
#6-32 DIE, RND ADJ HSS, 13/16" OD, 0535-0060 #6 32 13/16"

$7.75 RD-8-32-A
#8-32 DIE, RND ADJ HSS, 13/16" OD, 0535-0070 #8 32 13/16"

$7.75 RD-10-24-A
#10-24 DIE, RND ADJ HSS, 13/16" OD, 0535-0080 #10 24 13/16"

$7.75 RD-12-24-A
#12-24 DIE, RND ADJ HSS, 13/16" OD, 0535-0090 #12 24 13/16"

$13.00 RD-1-64-B
#1-64 DIE, RND ADJ HSS, 1" OD, 0536-0010 #1 64 1"

$13.00 RD-2-56-B
#2-56 DIE, RND ADJ HSS, 1" OD, 0536-0020 #2 56 1"

$13.00 RD-3-48-B
#3-48 DIE, RND ADJ HSS, 1" OD, 0536-0030 #3 48 1"

$13.00 RD-4-40-B
#4-40 DIE, RND ADJ HSS, 1" OD, 0536-0040 #4 40 1"

$8.95 RD-5-40-B
#5-40 DIE, RND ADJ HSS, 1" OD, 0536-0050 #5 40 1"

$8.95 RD-6-32-B
#6-32 DIE, RND ADJ HSS, 1" OD, 0536-0060 #6 32 1"

$8.95 RD-8-32-B
#8-32 DIE, RND ADJ HSS, 1" OD, 0536-0070 #8 32 1"

$8.95 RD-10-24-B
#10-24 DIE, RND ADJ HSS, 1" OD, 0536-0080 #10 24 1"

$8.95 RD-12-24-B
#12-24 DIE, RND ADJ HSS, 1" OD, 0536-0090 #12 24 1"

$8.95 RD-1/4-20-B
1/4"-20 DIE, RND ADJ HSS, 1" OD, 0536-0105 1/4" 20 1"

$8.95 RD-5/16-18-B
5/16"-18 DIE, RND ADJ HSS, 1" OD, 0536-0115 5/16" 18 1"

$8.95 RD-3/8-16-B
3/8"-16 DIE, RND ADJ HSS, 1" OD, 0536-0125 3/8" 16 1"

$8.95 RD-7/16-14-B
7/16"-14 DIE, RND ADJ HSS, 1" OD, 0536-0135 7/16" 14 1"

$8.95 RD-1/2-13-B
1/2"-13 DIE, RND ADJ HSS, 1" OD, 0536-0145 1/2" 13 1"

$14.00 RD-1/4-20-C
1/4"-20 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0105 1/4" 20 1-1/2"

$14.00 RD-5/16-18-C
5/16"-18 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0115 5/16" 18 1-1/2"

$14.00 RD-3/8-16-C
3/8"-16 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0125 3/8" 16 1-1/2"

$14.00 RD-7/16-14-C
7/16"-14 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0135 7/16" 14 1-1/2"

$14.00 RD-1/2-13-C
1/2"-13 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0145 1/2" 13 1-1/2"

$14.00 RD-9/16-12-C
9/16"-12 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0155 9/16" 12 1-1/2"

$14.00 RD-5/8-11-C
5/8"-11 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0165 5/8" 11 1-1/2"

$14.00 RD-3/4-10-C
3/4"-10 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0175 3/4" 10 1-1/2"

$24.50 RD-1/4-20-D
1/4"-20 DIE, RND ADJ HSS, 2" OD, 0538-0105 1/4" 20 2"

$24.50 RD-5/16-18-D
5/16"-18 DIE, RND ADJ HSS, 2" OD, 0538-0115 5/16" 18 2"

$24.50 RD-3/8-16-D
3/8"-16 DIE, RND ADJ HSS, 2" OD, 0538-0125 3/8" 16 2"

$24.50 RD-7/16-14-D
7/16"-14 DIE, RND ADJ HSS, 2" OD, 0538-0135 7/16" 14 2"

$24.50 RD-1/2-13-D
1/2"-13 DIE, RND ADJ HSS, 2" OD, 0538-0145 1/2" 13 2"

$24.50 RD-9/16-12-D
9/16"-12 DIE, RND ADJ HSS, 2" OD, 0538-0155 9/16" 12 2"

$24.50 RD-5/8-11-D
5/8"-11 DIE, RND ADJ HSS, 2" OD, 0538-0165 5/8" 11 2"

$24.50 RD-3/4-10-D
3/4"-10 DIE, RND ADJ HSS, 2" OD, 0538-0175 3/4" 10 2"

$24.50 RD-7/8-9-D
7/8"-9 DIE, RND ADJ HSS, 2" OD, 0538-0185 7/8" 9 2"

$24.50 RD-1-8-D
1"-8 DIE, RND ADJ HSS, 2" OD, 0538-0195 1" 8 2"

$55.25 RD-1-1/8-7-E
1 1/8"-7 DIE, RND ADJ HSS, 2-1/2" OD, 0539-0205 1-1/8" 7 2-1/2"

$55.25 RD-1-1/4-7-E
1 1/4"-7 DIE, RND ADJ HSS, 2-1/2" OD, 0539-0215 1-1/4" 7 2-1/2"

$55.25 RD-1-3/8-6-E
1 3/8"-6 DIE, RND ADJ HSS, 2-1/2" OD, 0539-0225 1-3/8" 6 2-1/2"

$55.25 RD-1-1/2-6-E
1 1/2"-6 DIE, RND ADJ HSS, 2-1/2" OD, 0539-0235 1-1/2" 6 2-1/2"

National Fine Adjustable Round Split Dies

High Speed Steel. For cutting external threads.
Adjustment screw allows die to be set for different classes of fit.
Can be used to cut new threads or clean up existing threads.
Pitches not found in the listings for National Coarse or National Fine are listed as Special Pitch Dies.

Follow this link to see the corresponding Taps for these Dies.

Follow this link to explore our complete offering of taps, dies, and other threading tools.
Quantity Price Model Description Size Threads Per Inch O.D.

$11.40 RD-0-80-A
#0-80 DIE, RND ADJ HSS, 13/16" OD, 0535-0005 #0 80 13/16"

$11.40 RD-1-72-A
#1-72 DIE, RND ADJ HSS, 13/16" OD, 0535-0015 #1 72 13/16"

$11.40 RD-2-64-A
#2-64 DIE, RND ADJ HSS, 13/16" OD, 0535-0025 #2 64 13/16"

$11.40 RD-3-56-A
#3-56 DIE, RND ADJ HSS, 13/16" OD, 0535-0035 #3 56 13/16"

$11.40 RD-4-48-A
#4-48 DIE, RND ADJ HSS, 13/16" OD, 0535-0045 #4 48 13/16"

$7.75 RD-5-44-A
#5-44 DIE, RND ADJ HSS, 13/16" OD, 0535-0055 #5 44 13/16"

$7.75 RD-6-40-A
#6-40 DIE, RND ADJ HSS, 13/16" OD, 0535-0065 #6 40 13/16"

$7.75 RD-8-36-A
#8-36 DIE, RND ADJ HSS, 13/16" OD, 0535-0075 #8 36 13/16"

$7.75 RD-10-32-A
#10-32 DIE, RND ADJ HSS, 13/16" OD, 0535-0085 #10 32 13/16"

$7.75 RD-12-28-A
#12-28 DIE, RND ADJ HSS, 13/16" OD, 0535-0095 #12 28 13/16"

$13.00 RD-0-80-B
#0-80 DIE, RND ADJ HSS, 1" OD, 0536-0005 #0 80 1"

$13.00 RD-1-72-B
#1-72 DIE, RND ADJ HSS, 1" OD, 0536-0015 #1 72 1"

$13.00 RD-2-64-B
#2-64 DIE, RND ADJ HSS, 1" OD, 0536-0025 #2 64 1"

$13.00 RD-3-56-B
#3-56 DIE, RND ADJ HSS, 1" OD, 0536-0035 #3 56 1"

$13.00 RD-4-48-B
#4-48 DIE, RND ADJ HSS, 1" OD, 0536-0045 #4 48 1"

$8.95 RD-5-44-B
#5-44 DIE, RND ADJ HSS, 1" OD, 0536-0055 #5 44 1"

$8.95 RD-6-40-B
#6-40 DIE, RND ADJ HSS, 1" OD, 0536-0065 #6 40 1"

$8.95 RD-8-36-B
#8 36- DIE, RND ADJ HSS, 1" OD, 0536-0075 #8 36 1"

$8.95 RD-10-32-B
#10-32 DIE, RND ADJ HSS, 1" OD, 0536-0085 #10 32 1"

$8.95 RD-12-28-B
#12-28 DIE, RND ADJ HSS, 1" OD, 0536-0095 #12 28 1"

$8.95 RD-1/4-28-B
1/4"-28 DIE, RND ADJ HSS, 1" OD, 0536-0110 1/4" 28 1"

$8.95 RD-5/16-24-B
5/16"-24 DIE, RND ADJ HSS, 1" OD, 0536-0120 5/16" 24 1"

$8.95 RD-3/8-24-B
3/8"-24 DIE, RND ADJ HSS, 1" OD, 0536-0130 3/8" 24 1"

$8.95 RD-7/16-20-B
7/16"-20 DIE, RND ADJ HSS, 1" OD, 0536-0140 7/16" 20 1"

$8.95 RD-1/2-20-B
1/2"-20 DIE, RND ADJ HSS, 1" OD, 0536-0150 1/2" 20 1"

$14.00 RD-1/4-28-C
1/4"-28 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0110 1/4" 28 1-1/2"

$14.00 RD-5/16-24-C
5/16"-24 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0120 5/16" 24 1-1/2"

$14.00 RD-3/8-24-C
3/8"-24 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0130 3/8" 24 1-1/2"

$14.00 RD-7/16-20-C
7/16"-20 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0140 7/16" 20 1-1/2"

$14.00 RD-1/2-20-C
1/2"-20 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0150 1/2" 20 1-1/2"

$14.00 RD-9/16-18-C
9/16"-18 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0160 9/16" 18 1-1/2"

$14.00 RD-5/8-18-C
5/8"-18 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0170 5/8" 18 1-1/2"

$14.00 RD-3/4-16-C
3/4"-16 DIE, RND ADJ HSS, 1-1/2" OD, 0537-0180 3/4" 16 1-1/2"

$24.50 RD-1/4-28-D
1/4"-28 DIE, RND ADJ HSS, 2" OD, 0538-0110 1/4" 28 2"

$24.50 RD-5/16-24-D
5/16"-24 DIE, RND ADJ HSS, 2" OD, 0538-0120 5/16" 24 2"

$24.50 RD-3/8-24-D
3/8"-24 DIE, RND ADJ HSS, 2" OD, 0538-0130 3/8" 24 2"

$24.50 RD-7/16-20-D
7/16"-20 DIE, RND ADJ HSS, 2" OD, 0538-0140 7/16" 20 2"

$24.50 RD-1/2-20-D
1/2"-20 DIE, RND ADJ HSS, 2" OD, 0538-0150 1/2" 20 2"

$24.50 RD-9/16-18-D
9/16"-18 DIE, RND ADJ HSS, 2" OD, 0538-0160 9/16" 18 2"

$24.50 RD-5/8-18-D
5/8"-18 DIE, RND ADJ HSS, 2" OD, 0538-0170 5/8" 18 2"

$24.50 RD-3/4-16-D
3/4"-16 DIE, RND ADJ HSS, 2" OD, 0538-0180 3/4" 16 2"

$24.50 RD-7/8-14-D
7/8"-14 DIE, RND ADJ HSS, 2" OD, 0538-0190 7/8" 14 2"
Out of stock
$24.50 RD-1-14-D
1"-14 DIE, RND ADJ HSS, 2" OD, 0538-0200 1" 14 2"

$55.25 RD-1-14-E
1"-14 DIE, RND ADJ HSS, 2-1/2" OD (limited quantity), 0539-0200 1" 14 2-1/2"

$55.25 RD-1-1/8-12-E
1 1/8"-12 DIE, RND ADJ HSS, 2-1/2" OD, 0539-0210 1-1/8" 12 2-1/2"

$55.25 RD-1-1/4-12-E
1 1/4"-12 DIE, RND ADJ HSS, 2-1/2" OD, 0539-0220 1-1/4" 12 2-1/2"

$55.25 RD-1-3/8-12-E
1 3/8"-12 DIE, RND ADJ HSS, 2-1/2" OD, 0539-0230 1-3/8" 12 2-1/2"

$55.25 RD-1-1/2-12-E
1 1/2"-12 DIE, RND ADJ HSS, 2-1/2" OD, 0539-0240 1-1/2" 12 2-1/2"

Tapfree 2 Cutting Fluid

We have temporarily removed these items from our catalog while we re-organize our inventory.
Tapfree 2 Cutting Fluid.
For all metals except magnesium.
Environmentally safe, water-based fluid.
Used for tapping, milling, drilling, etc.
Quickly penetrates to the cutting edge and reduces friction and heat generated during cutting.
Safer than chlorinated solvents or oils.
Intended to be used full strength (primarily through misting or direct application), and not in recirculators. The viscosity of these fluids makes pumping difficult.

Please note: these cutting and tapping fluids ship by GROUND ONLY !
These products are NOT available for export.
Quantity Price Model Description
Out of stock
$11.16 CF-T2-PT
Tapfree 2, Pint WT:6720-70
Out of stock
$62.40 CF-T2-GA
Tapfree 2, Gallon

Die Stocks For Adjustable Round Split Dies

Die Stocks for holding round threading dies.
Straight-arm die stocks for manual threading.

A 1" Die Stock holds 1" Outside Diameter (OD) dies, a DS-2 holds 2" OD dies, etc.

Follow this link to explore our complete offering of taps, dies, and other threading tools.
Quantity Price Model Description Holds Dies of OD: Approx. Length:

$4.90 DS-5/8
5/8" Die Stock, 0513-0295 5/8" 5.5"

$5.10 DS-13/16
13/16" Die Stock, 0513-0003 13/16" 6.25"

$5.90 DS-1
1" Die Stock, 0513-0005 1" 8.6"

$8.60 DS-1-1/2
1-1/2" Die Stock, 0513-0010 1 1/2" 12"

$12.00 DS-2
2" Die Stock, 0513-0015 2" 19.5"

$20.70 DS-2-1/2
2-1/2" Die Stock, 0513-0020 2 1/2" 19"

$28.00 DS-3
3" Die Stock, 0513-0030 3" 21.75"

$55.20 DS-4
4" Die Stock, 0513-0300 4" 29.25"

$93.00 DS-5
5" Die Stock, 0513-0305 5" 33"