The Nut,self-Locking,barrel, cataloged under National Stock Number 5310-00-659-0286, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-659-0286 |
| Primary Part Number | 2552-144 |
| Item Name | Nut,self-Locking,barrel |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Nut Length | 2.000 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE NUT |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 250.0 FAHRENHEIT NOMINAL DEGF |
| Hardness Rating | 29.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | MIL-M-20693 MIL SPEC ALL MATERIAL RESPONSES LOCKING INSERT |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Nut Counterbore Depth | 0.506 INCHES MINIMUM AND 0.526 INCHES MAXIMUM NUT IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.875 INCHES IN |
| Nut Diameter | 1.5554 INCHES MINIMUM AND 1.5584 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.907 INCHES MINIMUM AND 0.917 INCHES MAXIMUM NUT IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 1.364 INCHES MINIMUM AND 1.384 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM NUT |
| Nut Style | FLOATING SELF-LOCKING BARREL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 14 |
| Material | STEEL COMP 4130 NUT |
| Material | PLASTIC POLYHEXAMETHYLENE AMIDE OR PLASTIC POLYCAPROLACTAM LOCKING INSERT |
| Barrel Height | 0.817 INCHES MINIMUM AND 0.837 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 2552-144 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 2552-144 | 5/9 Secondary reference Harvard Industries Inc |
| SL4090-14 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-659-0286 is a Nut,self-Locking,barrel, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-659-0286 has 1 manufacturer part number on file: 2552-144 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 2552-144: Nut Length: 2.000 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE NUT; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Temp Rating: 250.0 FAHRENHEIT NOMINAL DEGF. 22 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.