The Nut,self-Locking,cap, cataloged under National Stock Number 5310-00-722-4146, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc. Government technical data includes 13 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-722-4146 |
| Primary Part Number | 3344563 |
| Item Name | Nut,self-Locking,cap |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc |
| Status | ACTIVE |
| Width Across Flats | 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Material Document and Classification | MIL-B-15939,COMP 5 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.750 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 1.000 INCHES MINIMUM IN |
| Nut Style | CAP |
| Thread Class | 3B |
| Thread Quantity Per Inch | 16 |
| Material | PLASTIC POLYAMIDE NYLON LOCKING INSERT |
| Material | COPPER ALLOY OVERALL EXCEPT INSERT |
| Bearing Surface Type | WASHER FACED |
| 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 |
|---|---|
| 3344563 PRIMARY | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc (USA) |
| Reference | Meaning |
|---|---|
| 3327013 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 3344563 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 09K3953-126 | 5/9 Secondary reference Harvard Industries Inc |
| 3344563 | 3/9 Design control — primary reference General Motors Corp Electro-Motive Div |
| 3344563 | 5/9 Secondary reference General Motors Corp |
NSN 5310-00-722-4146 is a Nut,self-Locking,cap, manufactured by Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-722-4146 has 1 manufacturer part number on file: 3344563 (Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-266-7923. Verify interchangeability with system specifications before substitution.
Key specifications for 3344563: Width Across Flats: 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN; Thread Series: UNF; Material Document and Classification: MIL-B-15939,COMP 5 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT; Thread Direction: RIGHT-HAND. 13 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.