The Nut,self-Locking,barrel, cataloged under National Stock Number 5310-01-188-5804, 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 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-188-5804 |
| Primary Part Number | 64446-542 |
| Item Name | Nut,self-Locking,barrel |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Nut Length | 0.585 INCHES MINIMUM AND 0.605 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-2416 ASSN STD ALL TREATMENT RESPONSES OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 6485 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.263 INCHES MINIMUM AND 0.283 INCHES MAXIMUM OVERALL IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.3125 INCHES IN |
| Nut Diameter | 0.669 INCHES MINIMUM AND 0.672 INCHES MAXIMUM IN |
| Specification/standard Data | 81755-C307 MANUFACTURERS SPECIFICATION CONTROL |
| Counterbore Diameter | 0.363 INCHES MINIMUM AND 0.373 INCHES MAXIMUM OVERALL IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.583 INCHES NOMINAL IN |
| Surface Treatment | NICKEL AND CADMIUM OVERALL |
| Nut Style | FLOATING SELF-LOCKING BARREL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP H11 OVERALL |
| Barrel Height | 0.486 INCHES MINIMUM AND 0.506 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 | X |
| Part Number | Manufacturer |
|---|---|
| 64446-542 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| SL409-5 | 3/2 Design control — primary reference U.S. Government activity |
| C307-5 | 7/2 Vendor item drawing reference U.S. Government activity |
| SL409-5F | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5310-01-188-5804 is a Nut,self-Locking,barrel, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-188-5804 has 1 manufacturer part number on file: 64446-542 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 64446-542: Nut Length: 0.585 INCHES MINIMUM AND 0.605 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-2416 ASSN STD ALL TREATMENT RESPONSES OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM. 20 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.