Spiral retaining rings are axially installed into housings/bores (internal) or onto shafts (external), making 360° contact with the groove. These rings are manufactured by coiling flat wire into the shape of the finished retaining ring. These rings lack lugs and holes, making them difficult to remove once installed.
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| Smalley® | Spiral Equivalent |
Military MIL-DTL-27426 |
Aerospace AS 3219 |
Metric Aerospace MA 4035 |
| VH | UR | - | - | - |
| VS | US | - | - | - |
| WH | RR | /3 | AS 4299 AS 3217Z |
- |
| WS | RS | /1 | AS 4299 AS 3218 |
- |
| WHT | RRT | - | - | - |
| WST | RST | - | - | - |
| WHM | RRN | /4 | AS 4299 AS 3215 |
- |
| WSM | RSN | /2 | AS 4299 AS 3216 |
- |
| DNH | - | - | - | - |
| DNS | - | - | - | - |
| EH | - | - | - | MA-4017 |
| ES | - | - | - | MA 4016 |
| FH | - | - | - | - |
| FS | - | - | - | - |

HO
HOI
BHO
VHO
TI
DHO
DHI
DHT
DHR
MHO
SH
SHR
SHI
SHM
BSH
VSH
E
SE
RE
BE
C
LC
PO
POL
EL
SHF
RG
TX
TY
DSH
DSI
DST
DSR
DE
DC
DTX
DTI
DSF
MSH
MSR
ME
MC
MRE
CFH
CRH
HBL
HN
IN
NAN
ND
SAE
SR
UHO
UHB
Ball & Roller
CBS
CFS
CRS
EN
RHC/RHO
Round
SAE
SB
SHC/SHO
SNL
Square
USC
USH
XAN
XD
VH
WH
WHT
WHM
VS
WS
WST
WSM
COV-CO
COL
CFV-CF
CWV-CW
CDV-CD
CDL
CMV-CM
CCV-CC
CHV-CH
CJV-CJ
FC
SC
SW/MW/BW
CE
PF
PC
HC
HW
DW
CTB
CTL
Assortment Kits