The Nut,clip-on, cataloged under National Stock Number 5310-01-185-4665, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-185-4665 |
| Primary Part Number | ST3M523C3M2 |
| Item Name | Nut,clip-on |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE CLIP |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF)UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Base to Center of Aperture | 0.520 INCHES NOMINAL0.520 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE CLIP |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Panel Thickness | 0.175 INCHES MINIMUM AND 0.175 INCHES MINIMUM AND 0.205 INCHES MAXIMUM0.205 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.190 INCHES0.190 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGNPREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | PASSIVATE CLIP |
| Countersink Angle | 90.0 DEGREES NOMINAL CLIP |
| Nut Style | FLOATINGFLOATING |
| Thread Class | 3B3B |
| Thread Quantity Per Inch | 3232 |
| Material | IRON ALLOY 660 NUT |
| Material | IRON ALLOY 660 CLIP |
| 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 |
|---|---|
| ST3M523C3M2 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M523C3M2 | Monadnock Company, the Dba Lisi Aerospace (USA) |
| ST3M523C3M2 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| A11144-8-3 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-185-4665 is a Nut,clip-on, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-185-4665 has 3 manufacturer part numbers on file: ST3M523C3M2 (Sps Technologies, Llc Dba PB Fasteners), ST3M523C3M2 (Monadnock Company, the Dba Lisi Aerospace), ST3M523C3M2 (The Boeing Company Div Defense).
Key specifications for ST3M523C3M2: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE CLIP; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF)UNIFIED NATIONAL JOINT FINE (UNJF); Distance From Base to Center of Aperture: 0.520 INCHES NOMINAL0.520 INCHES NOMINAL IN; Material Document and Classification: AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE NUT. 16 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.