Material Hardness Rating: 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
Usage Design: INTERNAL
Minor Thickness: 0.046 INCHES NOMINAL IN
Cross-Sectional Shape Style: BEVELED ONE OUTSIDE CORNER
Outside Diameter: 1.998 INCHES NOMINAL IN
Major Thickness: 0.062 INCHES NOMINAL IN
Casehardening Indicator: NOT CASEHARDENED
Identification
NSN: 5325-00-598-0850
NIIN: 005980850
FSC: 5325 — Fastening Devices
FSG: 53 — Hardware and Abrasives
General Description
The Ring,retaining, cataloged under National Stock Number 5325-00-598-0850, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5325-00-598-0850
Item Name
Ring,retaining
FSC / FSG
5325 / 53 — Fastening Devices
Status
ACTIVE
Material Hardness Rating
44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
Usage Design
INTERNAL
Minor Thickness
0.046 INCHES NOMINAL IN
Cross-Sectional Shape Style
BEVELED ONE OUTSIDE CORNER
Outside Diameter
1.998 INCHES NOMINAL IN
Major Thickness
0.062 INCHES NOMINAL IN
Casehardening Indicator
NOT CASEHARDENED
Ring Style
INTERNAL
Surface Treatment
PASSIVATE
Material
STEEL CORROSION RESISTING
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5325-00-663-2278RR77POSSIBLE MATCH
RING,RETAINING
Possible match (shared part number)Spirolox Inc
5325-00-801-9703POSSIBLE MATCH
RING,RETAINING
Possible match (shared part number)
5325-00-804-5088NAS16625-1462POSSIBLE MATCH
RING,RETAINING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5325-01-009-6841POSSIBLE MATCH
RING,RETAINING
Possible match (shared part number)
5325-01-255-0419POSSIBLE MATCH
RING,RETAINING
Possible match (shared part number)
5325-01-309-8766POSSIBLE MATCH
RING,RETAINING
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
MIL-R-21248B
5/9Secondary reference
U.S. Government activity
MS16631-4185
2/2Government specification standardization
U.S. Government activity
Related Parts
5325-00-663-2278POSSIBLE MATCH
RING,RETAINING
RR77
5325-00-801-9703POSSIBLE MATCH
RING,RETAINING
5325-00-804-5088POSSIBLE MATCH
RING,RETAINING
NAS16625-1462
5325-01-009-6841POSSIBLE MATCH
RING,RETAINING
5325-01-255-0419POSSIBLE MATCH
RING,RETAINING
5325-01-309-8766POSSIBLE MATCH
RING,RETAINING
Frequently Asked Questions
What is NSN 5325-00-598-0850?
NSN 5325-00-598-0850 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
What NSN replaces 5325-00-598-0850?
6 possible matches (shared part number, not a government interchangeability claim): 5325-00-663-2278, 5325-00-801-9703, 5325-00-804-5088. Verify interchangeability with system specifications before substitution.
What are the specifications of 5325-00-598-0850?
Key specifications for 5325-00-598-0850: Material Hardness Rating: 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; Minor Thickness: 0.046 INCHES NOMINAL IN; Cross-Sectional Shape Style: BEVELED ONE OUTSIDE CORNER. 10 specifications are documented in the U.S. Government catalog.
Is NSN 5325-00-598-0850 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.