The Nut,self-Locking,plate, cataloged under National Stock Number 5310-00-779-3605, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 26 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-779-3605 |
| Primary Part Number | 33A27C3K |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| Plate Thickness | 0.032 INCHES MAXIMUM IN |
| Nut Length | 1.051 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Plate Width | 0.290 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN |
| Temp Rating | 800.0 FAHRENHEIT NOMINAL DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Hardness Rating | 49.0 ROCKWELL C MAXIMUM |
| Mounting Hole Countersink Angle | 98.0 DEGREES MINIMUM AND 102.0 DEGREES MAXIMUM |
| Material Document and Classification | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Mounting Provision Location | OPPOSITE NUT PROJECTION SIDE |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Distance From Aperture Center to Mounting Hole Center | 0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.310 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Nut Height | 0.250 INCHES MAXIMUM IN |
| Surface Treatment | SILVER OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Nut Mounting Provision | COUNTERSUNK 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 |
|---|---|
| 33A27C3K | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| RF100C3K | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| F2031-3BC | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| F2031-3BC | 5/9 Secondary reference Klx Aerospace Solutions II SAS |
| 13715-02BC | 5/2 Secondary reference U.S. Government activity |
| LHTA517-2860-02BC | 5/9 Secondary reference Harvard Industries Inc |
| 13715-02BC | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| MS21062-3K | 3/2 Design control — primary reference U.S. Government activity |
| T66C1032CBC | 5/9 Secondary reference Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace |
| MS21062-3K | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-779-3605 is a Nut,self-Locking,plate, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-779-3605 has 2 manufacturer part numbers on file: 33A27C3K (Lockheed Martin Corporation Div Rotary and Mission Systems), RF100C3K (Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems).
Key specifications for 33A27C3K: Plate Thickness: 0.032 INCHES MAXIMUM IN; Nut Length: 1.051 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 26 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.