Mustad: 7131

Smaller marked as Japanned, larger as black

Company	Mustad
Type	Single
Eye	Ringed eye
Eye Position	Parallell
Shank Style	Straigth
Barb	Barb
Color	Black Japanned
Usages	Wet Streamer Nymph Trout Grayling Freshwater Soft Hackle
Sizes	6 5 1 1/0 2/0 3/0

Sizes

Length	18.98 mm
Shank Length	11.31 mm
Throat	7.29 mm
Gape	6.93 mm
Eye Width	2.99 mm
Wire Thickness	0.69 mm

Length	20.24 mm
Shank Length	12.54 mm
Throat	8.09 mm
Gape	7.24 mm
Eye Width	3.21 mm
Wire Thickness	0.74 mm

Length	28.03 mm
Shank Length	16.32 mm
Throat	9.78 mm
Gape	9.86 mm
Eye Width	4.13 mm
Wire Thickness	0.91 mm

Length	30.54 mm
Shank Length	18.62 mm
Throat	11.43 mm
Gape	10.38 mm
Eye Width	4.16 mm
Wire Thickness	0.95 mm

Length	32.90 mm
Shank Length	20.10 mm
Throat	12.39 mm
Gape	11.48 mm
Eye Width	4.74 mm
Wire Thickness	1.04 mm

Length	36.56 mm
Shank Length	21.25 mm
Throat	12.87 mm
Gape	13.87 mm
Eye Width	5.12 mm
Wire Thickness	1.14 mm

Similar hooks

Hooks found to have similar properties as this hook (matched per hook size, ordered by total length).
The left number in each column is this value for that size.

Size	Hook	Length	Shank Length	Gape	Throat	Wire
6	HDN 302	18.98 -> 18.74	11.31 -> 11.84	6.93 -> 7.29	7.29 -> 8.00	0.69 -> 0.64
3/0	7111 B	36.56 -> 39.21	21.25 -> 23.26	13.87 -> 13.75	12.87 -> 13.22	1.14 -> 1.14