Calc Result

Target Archery Equipment Reference

Page Contents

Fletch Sizes

Length

Name

Imperial

Metric

EP-16 1 ¾" 44.5mm
EP-23 2 ⅜" 60.3mm
EP-26 2 ⅞" 73mm
EP-40 3 ⅞" 98.4mm
EP-50 4 ¾" 121mm

Taper-Fit Nock Sizes

Outside Diameter

Spine

Imperial

Metric

Nock Size

23xx 23/64" 9.1mm 11/32"
22xx 11/32" 8.7mm 11/32"
21xx 21/64" 8.3mm 5/16"
20xx 5/16" 7.9mm 5/16"
19xx 19/64" 7.5mm 9/32"
18xx 9/32" 7.1mm 9/32"
17xx 17/64" 6.7mm 1/4"
16xx 1/4" 6.35mm 1/4"
15xx 15/64" 5.95mm 7/32"
14xx 7/32" 5.6mm 7/32"

Approximate Arrow Length Chart

Arrow Length Bow Length
14-18" 48"
18-20" 54"
20-22" 58"
22-24" 62"
24-26" 64"
26-28" 66"
28-30" 68"
30"+ 70"

Typical Bracing Heights

Outside Diameter

Bow Length

Colour Code

Min Bracing Height

Max Bracing Height

70" Green 8.5" / 216 mm 9.75" / 248 mm
68" Red 8.25" / 210 mm 9.5" / 241 mm
66" Blue 8" / 203 mm 9.25" / 235 mm
64" Pink 7.75" / 197 mm 9" / 229 mm
54" Yellow 6.5" / 165 mm 7.25" / 184 mm

Standard Size Reference

Item Size
Sight-block mounting screws 10-24 x ¾" long (3/16" Diameter Coarse thread)
Pressure Button / Arrow-rest mounting bolt. 5/16" -24
Pressure Button grub screws M3 x3 (5mm max)
Limb bolts
(Varies by manufacturer)
5/16" -24
From 1" to 1 ½" long
Counter-sunk Hex-head screws
For some kinds of tab
3mm x 8mm (0.5 thread.)
Recurve sight-pins 8 x 32
Compound sight-pins 10 x 32
Item Allen Key
Pressure Button - Spring. 2.5mm
Pressure Button - grub screws 1.5mm
Limb bolts
(where appropriate)
3/16"
(4.5mm or 5mm _may_ fit.)
Screws for some kinds of tab 2mm

Arrow Spine Conversion Chart

Aluminium Arrow Designation Approximate Spine
(small = stiff)
1214 2.5
1413 2.0
1416 1.7
1514 1.4
1516 1.4
1614 1.15
1616 1.08
1713 1.04
1714 0.96
1716 0.88
1813 0.87
1814 0.80
1816 0.76
1913 0.73
1914 0.66
1916 0.62
2013 0.61
2014 0.58
2016 0.53
2114 0.51
2115 0.46
2212 0.505
2213 0.46
2214 0.425
2312 0.42
2314 0.39
2412 0.40
2413 0.365
2511 0.348
2512 0.321
2612 0.285
2613 0.265
2712 0.260