Hamilton Khaki Aviation

Most Hamilton Khaki Aviation references take a 22 mm watch strap: 96 of 198. The lug width follows the case size: 41 mm case → 22 mm, 42 mm case → 20 mm, 44 mm case → 22 mm and 46 mm case → 22 mm.

Shop 18 mm Shop 19 mm Shop 20 mm Shop 22 mm

Hamilton Khaki Aviation lug width by case size

198 references measured. Updated 2026-10-30.

Case	Lug width	Buckle width	References	Watch strap attachment	For example
35 mm	18 mm	—	3	—	H76419531, H76419941, H76419951
36 mm	18 mm	18 mm	5	—	H76215130, H76215140, H76215850
38 mm	19 mm · 18 mm on 3 · 20 mm on 3	18 mm	14	—	H76225151, H76225751, H76235131
39 mm	20 mm	—	4	—	H76305130, H76305140, H76305530
40 mm	20 mm · 22 mm on 1	—	10	—	H74512133, H74512333, H74512833
41 mm	22 mm · 20 mm on 2	—	27	—	H76409140, H76409540, H76416135
42 mm	20 mm · 21 mm on 14	20 mm	52	—	H64605531, H64611135, H64611535
43 mm	20 mm	—	3	—	H76709510, H76709530, H76719530
44 mm	22 mm · 20 mm on 3	—	35	—	H76515133, H76515523, H76515533
45 mm	22 mm	—	19	—	H76712151, H76712751, H76714135
46 mm	22 mm · 20 mm on 5	—	20	—	H64705531, H64715545, H64725131
55 mm	22 mm	—	4	—	H71726213, H71726233, H71726313
not recorded	20 mm	—	2	—	H6006461111, H64655941

References that take a different watch strap

H64425555: 20 mm, not the 19 mm of most 38 mm cases
H64425585: 20 mm, not the 19 mm of most 38 mm cases
H64445595: 20 mm, not the 19 mm of most 38 mm cases
H76205530: 18 mm, not the 19 mm of most 38 mm cases
H76255810: 18 mm, not the 19 mm of most 38 mm cases
H76265810: 18 mm, not the 19 mm of most 38 mm cases
H76409530: 22 mm, not the 20 mm of most 40 mm cases
H76582733: 20 mm, not the 22 mm of most 41 mm cases
H76582933: 20 mm, not the 22 mm of most 41 mm cases
H77612133: 21 mm, not the 20 mm of most 42 mm cases
H77612333: 21 mm, not the 20 mm of most 42 mm cases
H77612533: 21 mm, not the 20 mm of most 42 mm cases
H77612933: 21 mm, not the 20 mm of most 42 mm cases
H77622553: 21 mm, not the 20 mm of most 42 mm cases
H77642333: 21 mm, not the 20 mm of most 42 mm cases
H77665173: 21 mm, not the 20 mm of most 42 mm cases
H77665373: 21 mm, not the 20 mm of most 42 mm cases
H77665673: 21 mm, not the 20 mm of most 42 mm cases
H77665873: 21 mm, not the 20 mm of most 42 mm cases
H77665973: 21 mm, not the 20 mm of most 42 mm cases
H77672133: 21 mm, not the 20 mm of most 42 mm cases
H77672333: 21 mm, not the 20 mm of most 42 mm cases
H77682313: 21 mm, not the 20 mm of most 42 mm cases
H77626353: 20 mm, not the 22 mm of most 44 mm cases

And 7 more in the full list below.

Questions about the Hamilton Khaki Aviation

Do all Hamilton Khaki Aviation case sizes take the same watch strap?

No. The lug width changes with the case size: the 41 mm case takes 22 mm, the 42 mm case takes 20 mm, the 44 mm case takes 22 mm, the 45 mm case takes 22 mm and the 46 mm case takes 22 mm. Check your case diameter before you buy.

Can two Hamilton Khaki Aviation watches with a 42 mm case take different watch straps?

Yes. Of the 52 Hamilton Khaki Aviation references with a 42 mm case, 38 take 20 mm and 14 take 21 mm. The reference number decides, not the case size alone.