PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RD15951-150SRing,retaining

Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec · NSN 5325-00-205-6566 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-205-6566 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-205-6566. Primary manufacturer part number: RD15951-150S.
Features
  • Ring,retaining — FSC 5325
  • Ring Style: SPECIAL FLAT
  • Usage Design: INTERNAL
  • Strength Rating: ERR-060
  • Material: STEEL COMP 302
  • Material Document and Classification: AISI 302 ASSN STD SINGLE MATERIAL RESPONSE
  • Cross-Sectional Shape Style: DOUBLE OVAL
  • Major Thickness: 0.041 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
Applications
  • Applications requiring Steel Comp 302 construction
General Description

The Ring,retaining, cataloged under National Stock Number 5325-00-205-6566, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5325-00-205-6566
Primary Part NumberRD15951-150S
Item NameRing,retaining
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerHydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec
StatusCANCELLED
Ring StyleSPECIAL FLAT
Usage DesignINTERNAL
Strength RatingERR-060
MaterialSTEEL COMP 302
Material Document and ClassificationAISI 302 ASSN STD SINGLE MATERIAL RESPONSE
Cross-Sectional Shape StyleDOUBLE OVAL
Major Thickness0.041 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
Outside Diameter1.567 INCHES MINIMUM AND 1.582 INCHES MAXIMUM IN
Casehardening IndicatorNOT CASEHARDENED
Inside Diameter1.377 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
5325-00-598-2161185762 INTERCHANGEABLE
Ring,retaining
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
4460-01-198-9593 INTERCHANGEABLE
Filter,air,electrostatic
5325-01-218-7325RR-150-S INTERCHANGEABLE
Ring,retaining
Spirolox Inc
Cross-Reference Index
Part NumberManufacturer
RR150S Spirolox Inc (USA)
RR150SP Spirolox Inc (USA)
WH-150-S02 Smalley Steel Ring Co. (USA)
185762 Zf Industrieantriebe Witten Gmbh (DEU)
M2742630138D Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
RR150SP Smalley Steel Ring Co. (USA)
RD15951-150S PRIMARY Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec (USA)
RR15951-150S Spirolox Inc (USA)
Related Parts
5325-00-598-2161INTERCHANGEABLE
RING,RETAINING
185762
4460-01-198-9593INTERCHANGEABLE
FILTER,AIR,ELECTROSTATIC
5325-01-218-7325INTERCHANGEABLE
RING,RETAINING
RR-150-S

Frequently Asked Questions

What is NSN 5325-00-205-6566?

NSN 5325-00-205-6566 is a Ring,retaining, manufactured by Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec, classified under FSC 5325 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5325-00-205-6566?

NSN 5325-00-205-6566 has 8 cross-referenced part numbers: RR150S (Spirolox Inc), RR150SP (Spirolox Inc), WH-150-S02 (Smalley Steel Ring Co.), 185762 (Zf Industrieantriebe Witten Gmbh), M2742630138D (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 3 more.

What NSN replaces 5325-00-205-6566?

There are 3 known substitutes for 5325-00-205-6566: 5325-00-598-2161, 4460-01-198-9593, 5325-01-218-7325. Verify interchangeability with system specifications before substitution.

What are the specifications of RD15951-150S?

Key specifications for RD15951-150S: Ring Style: SPECIAL FLAT; Usage Design: INTERNAL; Strength Rating: ERR-060; Material: STEEL COMP 302. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5325-00-205-6566 still in active supply?

NSN 5325-00-205-6566 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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