PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5101-78Ring,retaining

Rotor Clip Company, Inc. · NSN 5325-00-912-5818 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-912-5818 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-912-5818. Primary manufacturer part number: 5101-78.
Features
  • Ring,retaining — FSC 5325
  • Ring Style: EXTERNAL BOWED
  • Material Hardness Rating: 66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
  • Cross-Sectional Shape Style: RECTANGULAR
  • End Play Takeup: 0.020 INCHES MAXIMUM IN
  • Material: STEEL
  • Material Document and Classification: FED STD NO. 66,AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
  • Surface Treatment: NICKEL
Applications
  • Applications requiring Steel construction
General Description

The Ring,retaining, cataloged under National Stock Number 5325-00-912-5818, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Rotor Clip Company, Inc.. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5325-00-912-5818
Primary Part Number5101-78
Item NameRing,retaining
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerRotor Clip Company, Inc.
StatusCANCELLED
Ring StyleEXTERNAL BOWED
Material Hardness Rating66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
Cross-Sectional Shape StyleRECTANGULAR
End Play Takeup0.020 INCHES MAXIMUM IN
MaterialSTEEL
Material Document and ClassificationFED STD NO. 66,AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
Surface TreatmentNICKEL
Major Thickness0.042 INCHES NOMINAL IN
Casehardening IndicatorNOT CASEHARDENED
Inside Diameter0.722 INCHES NOMINAL IN
Usage DesignEXTERNAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5136-00-189-3218402290 INTERCHANGEABLE
Die,thread Cutting
Greenfield Industries Inc
3460-00-189-4624 INTERCHANGEABLE
Chuck,drill
3120-00-422-633223230 INTERCHANGEABLE
Bearing,sleeve
Briggs and Stratton Corp
4920-00-475-074823-2-1-30 INTERCHANGEABLE
Tie Down,trailer,th
Celtech Corporation Div Use CAGE 65552 for All Orders
3120-00-496-659521-329 INTERCHANGEABLE
Bushing,sleeve
Dresser Industries Inc Leroi Div
6645-00-536-1549 INTERCHANGEABLE
Staff,balance
1680-00-700-8371S6140-61105 INTERCHANGEABLE
Grip Assembly,controller,aircraf
Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp
2520-00-740-9816305340 INTERCHANGEABLE
Cover,brake Case
Garwood/feller Inc Garwood Winch Div
3110-00-801-3140 INTERCHANGEABLE
Bearing,ball,annular
6105-00-816-540511M502C3 INTERCHANGEABLE
Motor,control
American Precision Industries, Inc Div Portescap Us
Cross-Reference Index
Part NumberManufacturer
5101-78 Rotor Clip Company, Inc. (USA)
232-0030-00 Clinton Engines Corp (USA)
5101-78 Truarc Company Llc Dba Waldes Truarc (USA)
N1401-78CD Seeger Inc Anderton-United Products Div (USA)
MS16628-78 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
3101-78-ST Truarc Co Llc (USA)
2223601 Dresser Industries Inc Waukesha Engine Div (USA)
3101-78-ST Rotor Clip Company, Inc. (USA)
N1401-78CD Truarc Company Llc Dba Waldes Truarc (USA)
232-30 Clinton Engines Corp (USA)
21329 Clinton Engines Corp (USA)
1200119 Univex Corporation Div Univex Corportation (USA)
N1401-78CD Rotor Clip Company, Inc. (USA)
3101-78 Truarc Co Llc (USA)
N1401-78AS Seeger Inc Anderton-United Products Div (USA)
Related Parts
5136-00-189-3218INTERCHANGEABLE
DIE,THREAD CUTTING
402290
3460-00-189-4624INTERCHANGEABLE
CHUCK,DRILL
3120-00-422-6332INTERCHANGEABLE
BEARING,SLEEVE
23230
4920-00-475-0748INTERCHANGEABLE
TIE DOWN,TRAILER,TH
23-2-1-30
3120-00-496-6595INTERCHANGEABLE
BUSHING,SLEEVE
21-329
6645-00-536-1549INTERCHANGEABLE
STAFF,BALANCE
1680-00-700-8371INTERCHANGEABLE
GRIP ASSEMBLY,CONTROLLER,AIRCRAF
S6140-61105
2520-00-740-9816INTERCHANGEABLE
COVER,BRAKE CASE
305340
3110-00-801-3140INTERCHANGEABLE
BEARING,BALL,ANNULAR
6105-00-816-5405INTERCHANGEABLE
MOTOR,CONTROL
11M502C3
5998-00-824-5807INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5962-01-044-4593INTERCHANGEABLE
MICROCIRCUIT,DIGITAL

Frequently Asked Questions

What is NSN 5325-00-912-5818?

NSN 5325-00-912-5818 is a Ring,retaining, manufactured by Rotor Clip Company, Inc., classified under FSC 5325 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5325-00-912-5818?

NSN 5325-00-912-5818 has 15 cross-referenced part numbers: 5101-78 (Rotor Clip Company, Inc.), 232-0030-00 (Clinton Engines Corp), 5101-78 (Truarc Company Llc Dba Waldes Truarc), N1401-78CD (Seeger Inc Anderton-United Products Div), MS16628-78 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M) and 10 more.

What NSN replaces 5325-00-912-5818?

There are 12 known substitutes for 5325-00-912-5818: 5136-00-189-3218, 3460-00-189-4624, 3120-00-422-6332 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5101-78?

Key specifications for 5101-78: Ring Style: EXTERNAL BOWED; Material Hardness Rating: 66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR; End Play Takeup: 0.020 INCHES MAXIMUM IN. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5325-00-912-5818 still in active supply?

NSN 5325-00-912-5818 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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