CalcResult

Target Archery Equipment Reference

Page Contents

Fletch Sizes

Length

Name

Imperial

Metric

EP-161 ¾"44.5mm
EP-232 ⅜"60.3mm
EP-262 ⅞"73mm
EP-403 ⅞"98.4mm
EP-504 ¾"121mm

Taper-Fit Nock Sizes

Outside Diameter

Spine

Imperial

Metric

Nock Size

23xx23/64"9.1mm 11/32"
22xx11/32"8.7mm11/32"
21xx21/64"8.3mm5/16"
20xx5/16"7.9mm5/16"
19xx19/64" 7.5mm9/32"
18xx9/32"7.1mm9/32"
17xx17/64"6.7mm1/4"
16xx1/4"6.35mm1/4"
15xx 15/64"5.95mm7/32"
14xx7/32"5.6mm7/32"

Approximate Arrow Length Chart

Arrow LengthBow 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"Green8.5" / 216 mm9.75" / 248 mm
68"Red8.25" / 210 mm9.5" / 241 mm
66"Blue8" / 203 mm9.25" / 235 mm
64" Pink7.75" / 197 mm9" / 229 mm
54"Yellow6.5" / 165 mm7.25" / 184 mm

Standard Size Reference

ItemSize
Sight-block mounting screws10-24 x ¾" long (3/16" Diameter Coarse thread)
Pressure Button / Arrow-rest mounting bolt.5/16" -24
Pressure Button grub screwsM3 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-pins8 x 32
Compound sight-pins10 x 32
ItemAllen Key
Pressure Button - Spring.2.5mm
Pressure Button - grub screws1.5mm
Limb bolts
(where appropriate)
3/16"
(4.5mm or 5mm _may_ fit.)
Screws for some kinds of tab2mm

Arrow Spine Chart

Aluminium Arrow Designation Approximate Spine
(small = stiff)
12142.5
14132.0
14161.7
15141.4
1516 1.4
16141.15
16161.08
17131.04
17140.96
1716 0.88
18130.87
18140.80
18160.76
19130.73
1914 0.66
19160.62
20130.61
20140.58
20160.53
2114 0.51
21150.46
22120.505
22130.46
22140.425
2312 0.42
23140.39
24120.40
24130.365
25110.348
2512 0.321
26120.285
26130.265
27120.260