Size Chart

Bolt sizeSizeTolerance
3mm56.1256.92
1-3/8″BSW56.5157.31
M24mm4.024.12
3/16″4.784.88
M2.55mm5.025.12
M35.5mm5.535.63
M3.56mm6.036.15
1/4″6.386.50
M47mm7.037.15
5/16″7.968.11
M58mm8.038.18
1/8″BSW8.628.77
9mm9.039.18
3/8″9.559.70
M610mm10.0410.24
M711mm11.0411.24
1/4″UNF7/16″11.1511.35
3/16″BSW11.3411.54
12mm12.0412.30
5/16″UNF1/2″12.7413.00
M813mm13.0413.30
1/4″BSW13.3813.64
14mm14.0514.35
3/8″UNF9/16″14.3314.63
15mm15.0515.35
5/16″BSW15.2915.59
7/16″UNF5/8″15.9216.22
16mm16.0516.35
M1017mm17.0517.40
7/16″UNF11/16″17.5117.86
18mm18.0518.40
3/8″BSW18.0818.43
M1219mm19.0619.46
1/2″UNF3/4″19.1119.51
Bolt sizeSizeTolerance
20mm20.0620.46
9/16″B-UNF13/16″20.6921.09
7/16″BSW20.8921.29
21mm21.0621.46
M1422mm22.0622.46
1/2″UNC7/8″22.2822.68
23mm23.0623.46
1/2″BSW23.4323.83
5/8″UNF15/16″23.8724.27
M1624mm24.0624.46
25mm25.0625.46
1″25.4625.86
9/16″BSW25.7326.23
26mm26.0826.58
5/8″UNC1-1/16″27.0627.56
M1827mm27.0827.58
28mm28.0828.58
5/8″BSW28.1128.61
3/4″UNF1-1/8″28.6529.15
29mm29.0829.58
M2030mm30.0830.58
1-3/16″30.2430.74
11/16″BSW30.5631.06
31mm31.0831.58
3/4″UNC1-1/4″31.8332.33
M2232mm32.0832.58
33mm33.0833.58
3/4″BSW33.1033.60
7/8″UNF1-5/16″33.4133.91
34mm34.0834.58
1-3/8″35.0035.50
35mm35.0835.58
13/16″BSW35.3935.89
M2436mm36.1036.70
Bolt sizeSizeTolerance
7/8″UNC1-7/16″36.6137.22
7/8″BSW37.6938.29
38mm38.1038.70
1″UNF1-1/2″38.2038.80
1-9/16″39.7840.38
40mm40.1040.70
15/16″BSW40.2540.85
M2741mm41.1041.70
1″UNC1-5/8″41.3741.97
42mm42.1042.70
1″BSW42.5243.12
1-1/8″UNF1-11/16″42.9643.56
43mm43.1043.70
44mm44.1044.70
1-3/4″44.5545.15
45mm45.1045.70
M3046mm46.1046.70
1-1/8″UNC1-13/16″46.1346.73
47mm47.1047.70
1-1/8″BSW47.3447.94
1-1/4″UNF1-7/8″47.7248.32
48mm48.1048.70
49mm49.1049.70
1-15/16″49.3149.91
M3350mm50.1050.70
1-1/4″UNC2″50.9051.50
51mm51.1051.70
52mm52.1052.70
1-1/4″BSW52.1752.77
1-3/8″UNF2-1/16″52.4053.00
2-1/8″54.0754.67
54mm54.1054.70
M3655mm55.1255.92
1-3/8″UNC2-3/16″55.6856.48
Bolt sizeSizeTolerance
56mm56.1256.92
1-3/8″BSW56.5157.31
57mm57.1257.92
1-1/2″UNF2-1/4″57.2758.07
2-5/16″58.8559.65
M3960mm60.1260.92
1-1/2″UNC2-3/8″60.4461.24
1-1/2″BSW61.3362.13
1-5/8″UNF2-7/16″62.0362.83
2-1/2″63.6264.42
M4265mm65.1265.92
1-5/8″UNC2-9/16″65.2066.00
1-5/8″BSW65.6566.45
66mm66.1266.92
1-3/4″UNF2-5/8″66.7967.59
67mm67.1267.92
2-11/16″68.3869.18
1-3/4″UNC2-3/4″69.9770.77
M4570mm70.1270.92
1-3/4″BSW70.2271.02
1-7/8″UNF2-13/16″71.5572.35
73mm73.1273.92
2-7/8″73.1473.94
 1-7/8″UNC2-15/16″74.7375.53
M4875mm75.1576.15
2″UNF3″76.3577.35
1-7/8″BSW76.8577.85
77mm77.1578.15
3-1/16″77.9478.94
78mm78.1579.15
2″UNC3-1/8″79.5280.52
M5280mm80.1581.15
2″BSW80.1681.16
3-3/16″81.1182.11
Bolt sizeSizeTolerance
3-1/4″82.7083.70
3-5/16″84.2885.28
M5685mm85.1586.15
2-1/4″UNF3-3/8″85.8786.87
3-7/16″87.4688.46
2-1/4″UNC3-1/2″89.0590.05
M6090mm90.1591.15
2-1/4″BSW90.1591.15
3-9/16″90.6391.63
3-5/8″92.2293.22
3-11/16″93.8194.81
M6495mm95.1596.15
2-1/2″UNF3-3/4″95.4096.40
2-1/2″UNC3-7/8″98.5799.57
2-1/2″BSW99.15100.15
M68100mm100.15101.15
3-15/16″100.16101.16
4″101.75102.75
4-1/16″103.33104.33
4-1/8″104.92105.92
M72105mm105.20106.40
2-3/4″BSW106.38107.58
4-3/16″106.56107.76
2-3/4″UNC4-1/4″108.15109.35
4-5/16″109.73110.93
M76110mm110.20111.40
4-3/8″111.32112.52
4-7/16″112.91114.11
4-1/2″114.50115.70
M80115mm115.20116.40
3″BSW115.27116.47
4-9/16″116.08117.28
3″UNC4-5/8″117.67118.87
4-11/16″119.26120.46
Bolt sizeSizeTolerance
M85120mm120.20121.40
4-3/4″120.85122.05
4-13/16″122.43123.63
3-1/4″BSW123.52124.72
4-7/8″124.02125.22
125mm125.20126.40
4-15/16″125.61126.81
3-1/4″UNC5″127.20128.40
5-1/16″128.78129.98
M90130mm130.20131.40
5-1/8″130.37131.57
3-1/2″BSW131.78132.98
5-3/16″131.96133.16
5-1/4″133.55134.75
5-5/16″135.13136.33
M95135mm135.20136.40
3-1/2″UNC5-3/8″136.72137.92
5-7/16″138.31139.51
5-1/2″139.90141.10
140mm140.20141.40
3-3/4″BSW141.30142.50
5-9/16″141.48142.68
5-5/8″143.07144.27
5-11/16″144.66145.86
M100145mm145.20146.40
3-3/4″UNC5-3/4″146.25147.45
5-13/16″147.83149.03
5-7/8″149.42150.62
M105150mm150.20151.40
5-15/16″151.01152.21
4″BSW151.46152.66
6″152..60153.80
M110155mm155.20155.20
4″UNC6-1/8″155.78156.98

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