The Ring,retaining, cataloged under National Stock Number 5325-00-421-4945, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Pilatus Aircraft Ltd. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-421-4945 |
| Primary Part Number | 940.61.09.218 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Pilatus Aircraft Ltd |
| Status | ACTIVE |
| Material Hardness Rating | 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM |
| Usage Design | EXTERNAL |
| Material Document and Classification | AMS 5520 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Major Thickness | 0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN |
| Inside Diameter | 0.915 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | EXTERNAL INVERTED LUGS |
| Surface Treatment | PASSIVATE |
| Material | STEEL COMP 632 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 940.61.09.218 | Pilatus Aircraft Ltd (CHE) |
| Reference | Meaning |
|---|---|
| 5108-100-H | 5/9 Secondary reference Truarc Company Llc Dba Waldes Truarc |
| 4100-100-SS2 | C/1 Advisory reference — outside the item-of-supply concept Rotor Clip Company, Inc. |
| 51080100HSTB | 5/9 Secondary reference Truarc Company Llc Dba Waldes Truarc |
| 51000062CSTB | C/1 Advisory reference — outside the item-of-supply concept Rotor Clip Company, Inc. |
| MS16626-4100 | 2/2 Government specification standardization U.S. Government activity |
| MS16626-4098 | 4/1 Identification reference U.S. Government activity |
| SHI-100-SS2 | 5/9 Secondary reference Rotor Clip Company, Inc. |
| 51000062CSTB | 5/9 Secondary reference Truarc Company Llc Dba Waldes Truarc |
| 4100-100-SS2 | 5/9 Secondary reference U.S. Government activity |
| 1408-100-AS | 5/9 Secondary reference Seeger Inc Anderton-United Products Div |
| MS16626-4100 | 5/1 Secondary reference Rotor Clip Company, Inc. |
NSN 5325-00-421-4945 is a Ring,retaining, manufactured by Pilatus Aircraft Ltd, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-421-4945 has 1 manufacturer part number on file: 940.61.09.218 (Pilatus Aircraft Ltd).
Key specifications for 940.61.09.218: Material Hardness Rating: 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM; Usage Design: EXTERNAL; Material Document and Classification: AMS 5520 ASSN STD SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.