The Segment,ring Spacer, cataloged under National Stock Number 5365-01-577-2044, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is Hendrickson Trailer Suspension Systems. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-01-577-2044 |
| Primary Part Number | S-21099 |
| Item Name | Segment,ring Spacer |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Hendrickson Trailer Suspension Systems |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5365-01-577-2044 is a Segment,ring Spacer, manufactured by Hendrickson Trailer Suspension Systems, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-01-577-2044 has 3 manufacturer part numbers on file: S-21099 (Hendrickson Trailer Suspension Systems), 121543 (Haulmark Trailers (australia) Pty Ltd), S-21099 (Hendrickson Asia Pacific Pty Ltd).
1 possible match (shared part number, not a government interchangeability claim): 4240-01-696-2333. Verify interchangeability with system specifications before substitution.
Key specifications for S-21099: Special Features: USED ON ALL MODELS FOR HT230 OR N-HT230;4 REQUIRED PER SUSPENSION; Part Name Assigned by Controlling Agency: BUSHING TUBE SPACER; End Item Identification: HT230 TOP MOUNT SUSPENSION SYSTEM. 0 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.