®
Attachment Chain Nomenclature
Type
A
K
SA
SK
D
Description
Standard Attachments
Double Pitch
ASME/ANSI Standard
Bent Lug One Side
A-1: One Hole
A-2: Two Holes
A-1
A-1 or A-2
K-1
K-1 or K-2
1
SA-1
SA-1 or SA-2
S
SK-1
SK-1 or SK-2
r
D-1 or D-3
1 D
D-1 or D-3
1
3
Bent Lug Both Sides
K-1: One Hole
K-2: Two Holes
Straight Lug One Side
SA-1: One Hole
SA-2: Two Holes
Straight Lug Both Sides
SK-1: One Hole
SK-2: Two Holes
Extended Pins
D-1: One Pin Extended
D-3: Both Pins Extended
ASME/ANSI Specialty Attachments
WA
WK
WSA
WSK
AA
KK
Wide Contour
Bent Lug One Side
A-1: One Hole
A-2: Two Holes
WA-1
WA-2
Wide Contour
Bent Lug Both Sides
WK-1: One Hole
WK-2: Two Holes
WK-1
WK-2
Wide Contour
Straight Lug One Side
WSA-1: One Hole
WSA-2: Two Holes
WSA-1
WSA-2
Wide Contour
Straight Lug Both Sides
WSK-1: One Hole
WSK-2: Two Holes
WSK-1
WSK-2
Double Lug
Bent Top & Bottom
T
One Side
AA-1: One Hole
AA-1
Double Lug
Bent Top & Bottom
T
Both Sides
KK-1: One Hole
KK-1
