The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-101-3120, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. Government technical data includes 12 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-101-3120 |
| Primary Part Number | 29NU-101 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| Status | ACTIVE |
| Width Across Flats | 1.045 INCHES MINIMUM AND 1.067 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Special Test Features | LOCKING TORQUE IAW MIL-N-25027 |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.625 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.844 INCHES MINIMUM AND 0.874 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 11 |
| Material | STEEL OVERALL EXCEPT INSERT |
| 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 |
|---|---|
| 29NU-101 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| PL A-1978 PIECE 51 | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| Reference | Meaning |
|---|---|
| R-523PIECE74 | C/1 Advisory reference — outside the item-of-supply concept Circor Naval Solutions Llc Dba Warren Pumps |
| 29NU-101 | 5/9 Secondary reference Harvard Industries Inc |
| 49U-101 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 49NU-101 | C/1 Advisory reference — outside the item-of-supply concept Harvard Industries Inc |
NSN 5310-01-101-3120 is a Nut,self-Locking,hexagon, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-101-3120 has 2 manufacturer part numbers on file: 29NU-101 (Circor Naval Solutions Llc Dba Warren Pumps), PL A-1978 PIECE 51 (Circor Naval Solutions Llc Dba Warren Pumps).
Key specifications for 29NU-101: Width Across Flats: 1.045 INCHES MINIMUM AND 1.067 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Special Test Features: LOCKING TORQUE IAW MIL-N-25027; Thread Direction: RIGHT-HAND. 12 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.