The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-349-0837, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-349-0837 |
| Primary Part Number | 03A136W3L |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.363 INCHES MAXIMUM IN |
| Width Across Flats | 0.245 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR MS 5737 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE WASHER |
| Nut Counterbore Depth | 0.102 INCHES MINIMUM AND 0.112 INCHES MAXIMUM FIRST END IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Counterbore Diameter | 0.205 INCHES MINIMUM AND 0.210 INCHES MAXIMUM FIRST END IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 NUT |
| Material | STEEL CORROSION RESISTING WASHER |
| 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 |
|---|---|
| 03A136W3L | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| BHW136M3 | Bristol Industries, Llc (USA) |
| 03A136W3S | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| KFN512DL3 | Howmet Global Fastening Systems Inc (USA) |
| KFN512DL3 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| KFN512DL3 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| KFN512DL3 | 3/2 Design control — primary reference U.S. Government activity |
| BHW13GM3 | 5/9 Secondary reference Bristol Industries, Llc |
| 03A136WS | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| KFN512DL3 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-349-0837 is a Nut,self-Locking,extended Washer, manufactured by Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-349-0837 has 5 manufacturer part numbers on file: 03A136W3L (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), BHW136M3 (Bristol Industries, Llc), 03A136W3S (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), KFN512DL3 (Howmet Global Fastening Systems Inc), KFN512DL3 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 03A136W3L: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.280 INCHES MAXIMUM IN; Washer Outside Diameter: 0.363 INCHES MAXIMUM IN; Width Across Flats: 0.245 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN. 19 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.