The Nut,self-Locking,plate, cataloged under National Stock Number 5310-00-021-6949, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Esna, Llc. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5310-00-021-6949 |
| Primary Part Number | LHTA3300-02 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Plate Thickness | 0.085 INCHES NOMINAL IN |
| Nut Length | 0.722 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Precious Material | SILVER |
| Plate Width | 0.406 INCHES MAXIMUM IN |
| Temp Rating | 900.0 FAHRENHEIT NOMINAL DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Distance From Aperture Center to Mounting Hole Center | 0.250 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.500 INCHES NOMINAL IN |
| Nut Height | 0.208 INCHES MAXIMUM IN |
| Surface Treatment | SILVER OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Nut Mounting Provision | STRAIGHT HOLES |
| 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 |
|---|---|
| LHTA3300-02 PRIMARY | Esna, Llc (USA) |
| 19136-3 | Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company (USA) |
| Reference | Meaning |
|---|---|
| LHTA3300-02 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-021-6949 is a Nut,self-Locking,plate, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-021-6949 has 2 manufacturer part numbers on file: LHTA3300-02 (Esna, Llc), 19136-3 (Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company).
1 possible match (shared part number, not a government interchangeability claim): 5975-00-951-8272. Verify interchangeability with system specifications before substitution.
Key specifications for LHTA3300-02: Plate Thickness: 0.085 INCHES NOMINAL IN; Nut Length: 0.722 INCHES MAXIMUM IN; Thread Series: UNF; Precious Material: SILVER. 21 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.