The Ring,retaining, cataloged under National Stock Number 5325-00-721-5377, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Spirolox Inc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5325-00-721-5377 |
| Primary Part Number | RR81C |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — No Item Name Available |
| Manufacturer | Spirolox Inc |
| Status | CANCELLED |
| Major Thickness | 0.031 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Strength Rating | ERR-060 |
| Material | STEEL |
| Surface Treatment | CADMIUM |
| Material Document and Classification | SAE 1070 TO 1090 ASSN STD SINGLE MATERIAL RESPONSE |
| Inside Diameter | 0.723 INCHES NOMINAL IN |
| Usage Design | INTERNAL |
| Outside Diameter | 0.853 INCHES NOMINAL IN |
| Ring Style | SPIRAL |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 626-001-9038 | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| 305904 | Teledyne Brown Engineering, Inc. Dba Teledyne Turbine Engines Div Teledyne Turbine Engines (USA) |
| RR81C PRIMARY | Spirolox Inc (USA) |
NSN 5325-00-721-5377 is a Ring,retaining, manufactured by Spirolox Inc, classified under FSC 5325 (No Item Name Available). Status: cancelled.
NSN 5325-00-721-5377 has 3 cross-referenced part numbers: 626-001-9038 (Honeywell International Inc. Div Aerospace - Torrance), 305904 (Teledyne Brown Engineering, Inc. Dba Teledyne Turbine Engines Div Teledyne Turbine Engines), RR81C (Spirolox Inc).
There are 2 known substitutes for 5325-00-721-5377: 6515-01-580-2179, 6515-01-622-3134. Verify interchangeability with system specifications before substitution.
Key specifications for RR81C: Major Thickness: 0.031 INCHES NOMINAL IN; Casehardening Indicator: NOT CASEHARDENED; Strength Rating: ERR-060; Material: STEEL. 11 total characteristics are documented in the Federal Logistics Information System.
NSN 5325-00-721-5377 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.