The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-329-6675, 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 14 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-329-6675 |
| Primary Part Number | 03A136-8L |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Width Across Flats | 0.550 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.805 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| KFN511DL8 | Howmet Global Fastening Systems Inc (USA) |
| KFN511DL8 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 03A136-8L PRIMARY | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| BH136M8 | Bristol Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| KFN511DL8 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 03A136-8L | 5/9 Secondary reference U.S. Government activity |
| KFN511DL8 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-329-6675 is a Nut,self-Locking,hexagon, manufactured by Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-329-6675 has 4 manufacturer part numbers on file: KFN511DL8 (Howmet Global Fastening Systems Inc), KFN511DL8 (Sps Technologies, Llc Dba PB Fasteners), 03A136-8L (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), BH136M8 (Bristol Industries, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-354-8502. Verify interchangeability with system specifications before substitution.
Key specifications for 03A136-8L: Lubrication: DRY FILM LUBRICANT; Width Across Flats: 0.550 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Hardness Rating: 33.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM. 14 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.