The Nut,self-Locking,plate, cataloged under National Stock Number 5310-00-207-5564, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5310-00-207-5564 |
| Primary Part Number | RMLHA228-40 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Plate Thickness | 0.025 INCHES NOMINAL IN |
| Nut Length | 0.664 INCHES MINIMUM AND 0.684 INCHES MAXIMUM IN |
| Distance From Mounting Hole Center to Base | 0.320 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Plate Width | 0.295 INCHES MINIMUM AND 0.325 INCHES MAXIMUM IN |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Distance From Base to Center of Aperture | 0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.217 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN |
| Nut Height | 0.127 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 40 |
| 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 |
|---|---|
| RMLHA228-40 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| ES3958-01 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| ES3958-01 | 7/9 Vendor item drawing reference Drs Sustainment Systems, Inc. |
| RMLHA228-40 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-207-5564 is a Nut,self-Locking,plate, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-207-5564 has 1 manufacturer part number on file: RMLHA228-40 (Esna, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-344-6018. Verify interchangeability with system specifications before substitution.
Key specifications for RMLHA228-40: Lubrication: DRY FILM LUBRICANT; Plate Thickness: 0.025 INCHES NOMINAL IN; Nut Length: 0.664 INCHES MINIMUM AND 0.684 INCHES MAXIMUM IN; Distance From Mounting Hole Center to Base: 0.320 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN. 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.