The Spacer,ring, cataloged under National Stock Number 5365-01-243-5300, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is Rockwell Collins, Inc. Dba Rc Displays Systems. Government technical data includes 7 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. 2 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 | 5365-01-243-5300 |
| Primary Part Number | 42281-1 |
| Item Name | Spacer,ring |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Rockwell Collins, Inc. Dba Rc Displays Systems |
| Status | ACTIVE |
| Outside Diameter | 4.082 INCHES MINIMUM AND 4.092 INCHES MAXIMUM IN |
| Overall Thickness | 0.158 INCHES MINIMUM AND 0.168 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE |
| Features Provided | CASEHARDENED |
| Inside Diameter | 3.893 INCHES MINIMUM AND 3.903 INCHES MAXIMUM IN |
| Surface Treatment | CHROMIUM |
| Material | TITANIUM ALLOY UNS R56400 |
| 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 |
|---|---|
| 42281-1 PRIMARY | Rockwell Collins, Inc. Dba Rc Displays Systems (USA) |
NSN 5365-01-243-5300 is a Spacer,ring, manufactured by Rockwell Collins, Inc. Dba Rc Displays Systems, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-01-243-5300 has 1 manufacturer part number on file: 42281-1 (Rockwell Collins, Inc. Dba Rc Displays Systems).
2 possible matches (shared part number, not a government interchangeability claim): 5985-01-363-5058, 5940-01-563-2686. Verify interchangeability with system specifications before substitution.
Key specifications for 42281-1: Outside Diameter: 4.082 INCHES MINIMUM AND 4.092 INCHES MAXIMUM IN; Overall Thickness: 0.158 INCHES MINIMUM AND 0.168 INCHES MAXIMUM IN; Material Document and Classification: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE; Features Provided: CASEHARDENED. 7 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.