The Ring,retaining, cataloged under National Stock Number 5325-01-020-3873, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-020-3873 |
| Primary Part Number | 10224820-2 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Material Hardness Rating | 45.0 ROCKWELL C MINIMUM |
| Usage Design | EXTERNAL |
| Material Document and Classification | MIL-S-5059, TYPE 301, 1/4 HARD MIL SPEC 2ND MATERIAL RESPONSE |
| Inside Diameter | 0.187 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | COBALT ALLOY AND STEEL COMP 301 |
| 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 |
|---|---|
| CA18163 | Fairchild Fasteners Europe - Camloc Gmbh (DEU) |
| 10224820-2 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| CA18163 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Tridair Products |
| MIL-STD-130K | 5/9 Secondary reference U.S. Government activity |
NSN 5325-01-020-3873 is a Ring,retaining, manufactured by Us Army Aviation and Missile Command, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-020-3873 has 2 manufacturer part numbers on file: CA18163 (Fairchild Fasteners Europe - Camloc Gmbh), 10224820-2 (Us Army Aviation and Missile Command).
5 possible matches (shared part number, not a government interchangeability claim): 5325-01-029-9309, 5330-01-126-1268, 5330-01-173-5065. Verify interchangeability with system specifications before substitution.
Key specifications for 10224820-2: Material Hardness Rating: 45.0 ROCKWELL C MINIMUM; Usage Design: EXTERNAL; Material Document and Classification: MIL-S-5059, TYPE 301, 1/4 HARD MIL SPEC 2ND MATERIAL RESPONSE; Inside Diameter: 0.187 INCHES NOMINAL IN. 6 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.