The Nut,self-Locking,single Ball Sea, cataloged under National Stock Number 5310-00-455-2579, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Esna, Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Esna, Llc (CAGE 019L2); Sps Technologies, Llc Dba PB Fasteners (CAGE 56878) |
| Parameter | Value |
|---|---|
| NSN | 5310-00-455-2579 |
| Primary Part Number | H55LH4367-048 |
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| 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 |
| Part Number | Manufacturer |
|---|---|
| H55LH4367-048 PRIMARY | Esna, Llc (USA) |
| 68563N-08 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 55LH4367-048 | 5/9 Secondary reference Harvard Industries Inc |
| STSCA001N08 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5310-00-455-2579 is a Nut,self-Locking,single Ball Sea, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-455-2579 has 2 manufacturer part numbers on file: H55LH4367-048 (Esna, Llc), 68563N-08 (Sps Technologies, Llc Dba PB Fasteners).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-123-6986. Verify interchangeability with system specifications before substitution.
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.