The Aviation Point
The Aviation PointTechnical data sheet · theaviationpoint.com/parts/pins/ms3215/

MS3215 — external E retaining ring, reinforced, reduced section

MS3215: external e retaining ring, reinforced for .094 to .562 shafts. Ring and groove dimensions, and every part number by material and finish.

View PDF

Specification

Where to buy
ItemValue
TypeExternal E retaining ring, reinforced
MaterialCarbon steel, grade 1060 thru 1095 (ASTM A568/A568M or ASTM A684/A684M); corrosion-resistant steel, SAE-AMS 5520 (UNS S15700); beryllium copper, alloy 170 (UNS C17000) or 172 (UNS C17200), ASTM B194
FinishCarbon steel, by dash number: cadmium plate (SAE-AMS-QQ-P-416, Type II, Class 3, or ASTM B696, Type II, Class 5), zinc coat (ASTM B633, Type II, Class Fe/Zn5, or ASTM B695, Type II, Class 5) or phosphate coat (MIL-DTL-16232, Type I, Class 2); corrosion-resistant steel: cleaned, descaled and passivated (SAE-AMS2700)
ProcurementMIL-R-21248, Type I, Class 9
StatusCheck the current issue before design use.

Dimensions by size

Dimension, in.094.125.156.188.219.250.312.375.438.500.562
D — D free dia, basic.072.093.113.143.182.204.242.292.332.385.430
D tolerance+.001/-.003+.001/-.003+.002/-.003±.003±.003±.003±.003±.004±.004±.004±.004
E — E large section height, ref.067.089.111.116.132.156.173.184.207.212.220
T — T thickness, basic.015.015.025.025.025.025.025.035.035.042.042
T tolerance±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002
G — G groove dia, basic.074.095.116.147.188.210.250.303.343.396.437
G tolerance+.002/-.000+.002/-.000+.002/-.000+.002/-.000±.002±.002±.003±.003±.003±.003±.003
FIM — Groove concentricity, FIM.0015.0015.0015.0015.002.002.003.003.003.004.004
W — W groove width, basic.020.020.030.030.030.030.030.040.040.047.047
W tolerance+.002/-.000+.002/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000
R — R max, retained part.045.045.065.065.065.065.070.070.070.080.080
CH — CH max, retained part.033.033.050.050.050.050.055.055.055.060.060
Y — Y free outside dia, ref.206.270.335.375.446.516.588.660.746.810.870

Dimensions in inches, as tabulated in the standard (letters as on its drawing). Groove and retained-part figures are recommendations (ref).

Part numbers

Every part number by shaft diameter, material and finish. The standard governs.

.0945 part numbers

Part no.Material and finish
MS3215-1009Carbon steel, cadmium plate
MS3215-2009Carbon steel, zinc coat
MS3215-3009Carbon steel, phosphate coat
MS3215-4009Corrosion-resistant steel
MS3215-5009Beryllium copper

.1255 part numbers

Part no.Material and finish
MS3215-1012Carbon steel, cadmium plate
MS3215-2012Carbon steel, zinc coat
MS3215-3012Carbon steel, phosphate coat
MS3215-4012Corrosion-resistant steel
MS3215-5012Beryllium copper

.1565 part numbers

Part no.Material and finish
MS3215-1015Carbon steel, cadmium plate
MS3215-2015Carbon steel, zinc coat
MS3215-3015Carbon steel, phosphate coat
MS3215-4015Corrosion-resistant steel
MS3215-5015Beryllium copper

.1885 part numbers

Part no.Material and finish
MS3215-1018Carbon steel, cadmium plate
MS3215-2018Carbon steel, zinc coat
MS3215-3018Carbon steel, phosphate coat
MS3215-4018Corrosion-resistant steel
MS3215-5018Beryllium copper

.2195 part numbers

Part no.Material and finish
MS3215-1021Carbon steel, cadmium plate
MS3215-2021Carbon steel, zinc coat
MS3215-3021Carbon steel, phosphate coat
MS3215-4021Corrosion-resistant steel
MS3215-5021Beryllium copper

.2505 part numbers

Part no.Material and finish
MS3215-1025Carbon steel, cadmium plate
MS3215-2025Carbon steel, zinc coat
MS3215-3025Carbon steel, phosphate coat
MS3215-4025Corrosion-resistant steel
MS3215-5025Beryllium copper

.3125 part numbers

Part no.Material and finish
MS3215-1031Carbon steel, cadmium plate
MS3215-2031Carbon steel, zinc coat
MS3215-3031Carbon steel, phosphate coat
MS3215-4031Corrosion-resistant steel
MS3215-5031Beryllium copper

.3755 part numbers

Part no.Material and finish
MS3215-1037Carbon steel, cadmium plate
MS3215-2037Carbon steel, zinc coat
MS3215-3037Carbon steel, phosphate coat
MS3215-4037Corrosion-resistant steel
MS3215-5037Beryllium copper

.4385 part numbers

Part no.Material and finish
MS3215-1043Carbon steel, cadmium plate
MS3215-2043Carbon steel, zinc coat
MS3215-3043Carbon steel, phosphate coat
MS3215-4043Corrosion-resistant steel
MS3215-5043Beryllium copper

.5005 part numbers

Part no.Material and finish
MS3215-1050Carbon steel, cadmium plate
MS3215-2050Carbon steel, zinc coat
MS3215-3050Carbon steel, phosphate coat
MS3215-4050Corrosion-resistant steel
MS3215-5050Beryllium copper

.5625 part numbers

Part no.Material and finish
MS3215-1056Carbon steel, cadmium plate
MS3215-2056Carbon steel, zinc coat
MS3215-3056Carbon steel, phosphate coat
MS3215-4056Corrosion-resistant steel
MS3215-5056Beryllium copper

Part number

What each code means

PartMeaning
FormatMS3215-<dash>
ExampleMS3215-1025 — Carbon steel, cadmium plate, for a .250 shaft

Table II: hardness

Shaft dia (ref), inCarbon steelCorrosion-resistant steelBeryllium copper
.094 and .12584.5 - 87 HR15N82.5 - 86 HR15N77 - 82 HR15N
.156 to .12 incl.66.5 - 71 HR30N63 - 69.5 HR30N54 - 62 HR30N
.375 to .562 incl.47 - 52 HRC44 - 51 HRC34 - 43 HRC

As printed in MS3215C Table II; its middle row (".156 to .12 incl.") covers the shaft sizes .156 to .312.

Notes from the standard

  • Thickness T applies to unplated rings; for corrosion-resistant steel and plated rings add .002 to the maximum tolerance (±.002 becomes +.004/-.002).
  • FIM (full indicator movement): maximum allowable deviation of concentricity between the groove and the shaft.
  • R and CH: radii or chamfers allowable on the parts retained by the ring.
  • Use corrosion-resistant steel in food processing machinery, in fuel or lubrication systems, or above 450°F.
  • Calculated RPM limits (apply the required safety factor), shafts .125, .188, .250, .375 and .500: carbon and corrosion-resistant steel 70000, 50000, 38000, 28000 and 20000; beryllium copper 45000, 32000, 24000, 18000 and 13000.
  • Applied radially; intended to give large shoulders that withstand strong push-out forces, vibration and shock. Do not over-expand the ring at installation.

Where to buy

AmericaDistributor coming soonOur partner for this region is on its way
EuropeDistributor coming soonOur partner for this region is on its way
OceaniaDistributor coming soonOur partner for this region is on its way

Distributor? Get listed →

Distributors coming soon.

Keep going

Calculators

CalculatorPart Number Equivalent Cross-Reference & DecoderType any MS3215 number and see its other names.CalculatorDistributor finderFind where to buy aircraft part numbers

Guides

GuideASNA fastenersHow to read ASNA blind bolt and rivet numbersChartFastener cross-referenceFrequent fastener crosses with their supersession status

Data sheets

Data sheetPins, rings and small hardwareThe family side by side.Data sheetMS27980Fastener, Snap, Style 2Data sheetMS9048Pin, Spring, Steel, Cadmium Plated

Books

Fasteners & HardwareBookFasteners & HardwareFastener types and codes, sizes, tools and substitutes in one reference. Coming soon.

Sources

Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.
esc
↑↓ navigate↵ openesc close