The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-288-2111, 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 27 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-288-2111 |
| Primary Part Number | ST3M726C3MH |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Plate Thickness | 0.020 INCHES MAXIMUM IN |
| Nut Length | 0.989 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.568 INCHES MAXIMUM IN |
| Temp Rating | -65.0 FAHRENHEIT MINIMUM AND 350.0 FAHRENHEIT MAXIMUM DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Material Document and Classification | MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES SHELL |
| Material Document and Classification | AMS 5735 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5525 ASSN STD 2ND MATERIAL RESPONSE NUT |
| Material Document and Classification | MIL-R-25988,TY2,CL 1,GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE SEAL |
| Material Document and Classification | MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES WASHER |
| 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 | 0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.686 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Nut Height | 0.404 INCHES MINIMUM AND 0.533 INCHES MAXIMUM IN |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | RUBBER FLUOROSILICONE CLASS FQ SEAL |
| Material | IRON ALLOY 660 OR STEEL COMP 630 NUT |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 316 SHELL |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 316 WASHER |
| 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 |
|---|---|
| BSN726C3MH | Bristol Industries, Llc (USA) |
| ST3M726C3MH PRIMARY | The Boeing Company Div Defense (USA) |
| F52673H-3 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 10110283 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| NS202725G-3 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-288-2111 is a Nut,self-Locking,plate, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-288-2111 has 3 manufacturer part numbers on file: BSN726C3MH (Bristol Industries, Llc), ST3M726C3MH (The Boeing Company Div Defense), F52673H-3 (Howmet Global Fastening Systems Inc).
Key specifications for ST3M726C3MH: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.640 INCHES MAXIMUM IN; Plate Thickness: 0.020 INCHES MAXIMUM IN; Nut Length: 0.989 INCHES MAXIMUM IN. 27 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.