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MS16633 — external E retaining ring, reduced section

MS16633: external e retaining ring for .040 to 1.375 shafts. Ring and groove dimensions, and every part number by material and finish.

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Specification

Where to buy
ItemValue
TypeExternal E retaining ring
MaterialCarbon spring 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/Zn 5, or ASTM B695, Type II, Class 5) or phosphate coat (MIL-DTL-16232, Type Z, Class 2); corrosion-resistant steel: cleaned, descaled and passivated (SAE AMS2700)
ProcurementMIL-R-21248, Type I, Class 5
StatusCheck the current issue before design use.

Dimensions by size

Dimension, in.040.062.094.110.125.140.156.172.188.219.250.312.375.438.500.625.744.750.875.9841.1881.375
D — D free dia, basic.025.051.073.076.094.102.114.125.145.185.207.243.300.337.392.480.616.574.688.8221.0661.213
D tolerance+.001/-.003+.001/-.003+.001/-.003+.001/-.003+.001/-.003+.001/-.003+.001/-.003+.001/-.003+.001/-.003+.001/-.003+.001/-.003+.002/-.004+.002/-.004+.002/-.004+.002/-.004+.003/-.005+.003/-.005+.003/-.005+.003/-.005+.003/-.005+.006/-.010+.006/-.010
E — E large section height, ref.027.052.057.150.068.084.084.094.095.126.160.128.180.175.204.230.192.273.316.339.280.331
T — T thickness, basic.010.010.015.015.015.025.025.025.025.025.025.025.035.035.042.042.050.050.050.050.062.062
T tolerance±.001±.001±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.002±.003±.003
G — G groove dia, basic.026.052.074.079.095.105.116.127.147.188.210.250.303.343.396.485.625.580.675.8351.0791.230
G tolerance+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.005/-.000+.005/-.000
FIM — Groove concentricity, FIM.0015.0015.0015.0015.0015.002.002.002.002.002.002.004.004.004.004.004.004.004.004.004.005.005
W — W groove width, basic.012.014.020.020.020.030.030.030.030.030.030.030.040.040.047.047.056.056.056.056.068.068
W tolerance+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.002/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.003/-.000+.004/-.000+.004/-.000
R — R max, retained part.015.030.040.080.040.060.060.060.060.060.060.060.065.065.080.080.080.085.085.085.090.090
CH — CH max, retained part.010.020.030.060.030.045.045.045.045.045.045.045.050.050.060.060.045.065.065.065.070.070
E1 — E1 small section height, ref.012.022.022.060.030.038.033.040.035.045.055.047.060.062.080.090.078.110.120.130.130.140

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.

.0401 part number

Part no.Material and finish
MS16633-5004Beryllium copper

.0625 part numbers

Part no.Material and finish
MS16633-1006Carbon steel, cadmium plate
MS16633-2006Carbon steel, zinc coat
MS16633-3006Carbon steel, phosphate coat
MS16633-4006Corrosion-resistant steel
MS16633-5006Beryllium copper

.0945 part numbers

Part no.Material and finish
MS16633-1009Carbon steel, cadmium plate
MS16633-2009Carbon steel, zinc coat
MS16633-3009Carbon steel, phosphate coat
MS16633-4009Corrosion-resistant steel
MS16633-5009Beryllium copper

.1105 part numbers

Part no.Material and finish
MS16633-1011Carbon steel, cadmium plate
MS16633-2011Carbon steel, zinc coat
MS16633-3011Carbon steel, phosphate coat
MS16633-4011Corrosion-resistant steel
MS16633-5011Beryllium copper

.1255 part numbers

Part no.Material and finish
MS16633-1012Carbon steel, cadmium plate
MS16633-2012Carbon steel, zinc coat
MS16633-3012Carbon steel, phosphate coat
MS16633-4012Corrosion-resistant steel
MS16633-5012Beryllium copper

.1405 part numbers

Part no.Material and finish
MS16633-1014Carbon steel, cadmium plate
MS16633-2014Carbon steel, zinc coat
MS16633-3014Carbon steel, phosphate coat
MS16633-4014Corrosion-resistant steel
MS16633-5014Beryllium copper

.1565 part numbers

Part no.Material and finish
MS16633-1015Carbon steel, cadmium plate
MS16633-2015Carbon steel, zinc coat
MS16633-3015Carbon steel, phosphate coat
MS16633-4015Corrosion-resistant steel
MS16633-5015Beryllium copper

.1725 part numbers

Part no.Material and finish
MS16633-1017Carbon steel, cadmium plate
MS16633-2017Carbon steel, zinc coat
MS16633-3017Carbon steel, phosphate coat
MS16633-4017Corrosion-resistant steel
MS16633-5017Beryllium copper

.1885 part numbers

Part no.Material and finish
MS16633-1018Carbon steel, cadmium plate
MS16633-2018Carbon steel, zinc coat
MS16633-3018Carbon steel, phosphate coat
MS16633-4018Corrosion-resistant steel
MS16633-5018Beryllium copper

.2195 part numbers

Part no.Material and finish
MS16633-1021Carbon steel, cadmium plate
MS16633-2021Carbon steel, zinc coat
MS16633-3021Carbon steel, phosphate coat
MS16633-4021Corrosion-resistant steel
MS16633-5021Beryllium copper

.2505 part numbers

Part no.Material and finish
MS16633-1025Carbon steel, cadmium plate
MS16633-2025Carbon steel, zinc coat
MS16633-3025Carbon steel, phosphate coat
MS16633-4025Corrosion-resistant steel
MS16633-5025Beryllium copper

.3125 part numbers

Part no.Material and finish
MS16633-1031Carbon steel, cadmium plate
MS16633-2031Carbon steel, zinc coat
MS16633-3031Carbon steel, phosphate coat
MS16633-4031Corrosion-resistant steel
MS16633-5031Beryllium copper

.3755 part numbers

Part no.Material and finish
MS16633-1037Carbon steel, cadmium plate
MS16633-2037Carbon steel, zinc coat
MS16633-3037Carbon steel, phosphate coat
MS16633-4037Corrosion-resistant steel
MS16633-5037Beryllium copper

.4385 part numbers

Part no.Material and finish
MS16633-1043Carbon steel, cadmium plate
MS16633-2043Carbon steel, zinc coat
MS16633-3043Carbon steel, phosphate coat
MS16633-4043Corrosion-resistant steel
MS16633-5043Beryllium copper

.5005 part numbers

Part no.Material and finish
MS16633-1050Carbon steel, cadmium plate
MS16633-2050Carbon steel, zinc coat
MS16633-3050Carbon steel, phosphate coat
MS16633-4050Corrosion-resistant steel
MS16633-5050Beryllium copper

.6255 part numbers

Part no.Material and finish
MS16633-1062Carbon steel, cadmium plate
MS16633-2062Carbon steel, zinc coat
MS16633-3062Carbon steel, phosphate coat
MS16633-4062Corrosion-resistant steel
MS16633-5062Beryllium copper

.7445 part numbers

Part no.Material and finish
MS16633-1074Carbon steel, cadmium plate
MS16633-2074Carbon steel, zinc coat
MS16633-3074Carbon steel, phosphate coat
MS16633-4074Corrosion-resistant steel
MS16633-5074Beryllium copper

.7505 part numbers

Part no.Material and finish
MS16633-1075Carbon steel, cadmium plate
MS16633-2075Carbon steel, zinc coat
MS16633-3075Carbon steel, phosphate coat
MS16633-4075Corrosion-resistant steel
MS16633-5075Beryllium copper

.8755 part numbers

Part no.Material and finish
MS16633-1087Carbon steel, cadmium plate
MS16633-2087Carbon steel, zinc coat
MS16633-3087Carbon steel, phosphate coat
MS16633-4087Corrosion-resistant steel
MS16633-5087Beryllium copper

.9845 part numbers

Part no.Material and finish
MS16633-1098Carbon steel, cadmium plate
MS16633-2098Carbon steel, zinc coat
MS16633-3098Carbon steel, phosphate coat
MS16633-4098Corrosion-resistant steel
MS16633-5098Beryllium copper

1.1885 part numbers

Part no.Material and finish
MS16633-1118Carbon steel, cadmium plate
MS16633-2118Carbon steel, zinc coat
MS16633-3118Carbon steel, phosphate coat
MS16633-4118Corrosion-resistant steel
MS16633-5118Beryllium copper

1.3755 part numbers

Part no.Material and finish
MS16633-1137Carbon steel, cadmium plate
MS16633-2137Carbon steel, zinc coat
MS16633-3137Carbon steel, phosphate coat
MS16633-4137Corrosion-resistant steel
MS16633-5137Beryllium copper

Part number

What each code means

PartMeaning
FormatMS16633-<dash>
ExampleMS16633-1025 — Carbon steel, cadmium plate, for a .250 shaft

Table II: hardness

Shaft dia (ref), inCarbon steelCorrosion-resistant steelBeryllium copper
.040——79 - 82 HR15N
.062 to .125 incl.84.5 - 87.0 HR15N82.5 - 86 HR15N79 - 82 HR15N
.140 to .312 incl.66.5 - 71 HR30N63 - 69.5 HR30N56.5 - 68 HR30N
.375 to 1.375 incl.47 - 52 HRC44 - 51 HRC37 - 43 HRC

As printed in MS16633D Table II; the .040 ring is listed for beryllium copper only.

Every MS16633 number and its replacement

22 pairs, as listed in MS16633 Rev. D. The old number stays valid on drawings and IPCs; the replacement is what to order.

Show the 22 pairs
MS16633-4→ MS16633-5004MS16633-6→ MS16633-1006, -2006 or -3006MS16633-1→ MS16633-1009, -2009 or -3009MS16633-11→ MS16633-1011, -2011 or -3011MS16633-12→ MS16633-1012, -2012 or -3012MS16633-14→ MS16633-1014, -2014 or -3014MS16633-15→ MS16633-1015, -2015 or -3015MS16633-17→ MS16633-1017, -2017 or -3017MS16633-18→ MS16633-1018, -2018 or -3018MS16633-21→ MS16633-1021, -2021 or -3021MS16633-25→ MS16633-1025, -2025 or -3025MS16633-31→ MS16633-1031, -2031 or -3031MS16633-37→ MS16633-1037, -2037 or -3037MS16633-43→ MS16633-1043, -2043 or -3043MS16633-50→ MS16633-1050, -2050 or -3050MS16633-62→ MS16633-1062, -2062 or -3062MS16633-74→ MS16633-1074, -2074 or -3074MS16633-75→ MS16633-1075, -2075 or -3075MS16633-87→ MS16633-1087, -2087 or -3087MS16633-98→ MS16633-1098, -2098 or -3098MS16633-118→ MS16633-1118, -2118 or -3118MS16633-137→ MS16633-1137, -2137 or -3137

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.
  • The .040 ring is made in beryllium copper only: dash -5004 supersedes dash -4.
  • Inactive carbon steel numbers are replaced by the cadmium plated, zinc coated or phosphate coated carbon steel ring of the same shaft (pairs below).
  • Applied radially; intended to give large shoulders that withstand considerable thrust. Do not over-expand the ring at installation.
  • Approximate safety RPM limits, shafts .250, .500 and 1.000: steel 25000, 14000 and 8500; beryllium copper 16000, 9000 and 4000.

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Calculators

CalculatorPart Number Equivalent Cross-Reference & DecoderType any MS16633 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 sheetMS16632Ring, Retaining, External, Crescent (Reduced Section Type)Data sheetMS17984Pin, Quick Release, Self-Retaining, Positive Locking, Single Acting, Button Handle

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.
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