The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-434-6928, 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 19 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-434-6928 |
| Primary Part Number | FN1418-428 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Washer Outside Diameter | 0.409 INCHES MAXIMUM IN |
| Width Across Flats | 0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Temp Rating | 1400.0 FAHRENHEIT NOMINAL DEGF |
| Hardness Rating | 44.0 ROCKWELL C NOMINAL |
| Washer Thickness | 0.033 INCHES MINIMUM IN |
| Material Document and Classification | NICKEL ALLOY WAS PALOY,FSCM 80539 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | SILVER OVERALL |
| Precious Material and Location | EXTERNAL SURFACE SILVER |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | NICKEL ALLOY OVERALL |
| 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 |
|---|---|
| FN1418-428 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| DHE5579-4 | Wudel Edmond J Mfg Co Inc (USA) |
| BH00670-4 | Bristol Industries, Llc (USA) |
| H38-4 | Howmet Global Fastening Systems Inc (USA) |
| DHE5579 | Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts (USA) |
| Reference | Meaning |
|---|---|
| LH7399-048 | 5/9 Secondary reference Harvard Industries Inc |
| Z00.N5412521305 | 5/9 Secondary reference Daher Aerospace - Ex Socata |
| FN1418-428 | 5/9 Secondary reference U.S. Government activity |
| H38-4 | 5/9 Secondary reference Tecnotec Sarl |
| H38-4 | 5/9 Secondary reference Klx Aerospace Solutions II SAS |
NSN 5310-00-434-6928 is a Nut,self-Locking,extended Washer, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-434-6928 has 5 manufacturer part numbers on file: FN1418-428 (Sps Technologies, Llc Dba PB Fasteners), DHE5579-4 (Wudel Edmond J Mfg Co Inc), BH00670-4 (Bristol Industries, Llc), H38-4 (Howmet Global Fastening Systems Inc), DHE5579 (Alcoa Global Fasteners, Inc Dba Simmonds Mecaero Fas Pdts Div Simmonds Mecaero Fas Pdts).
3 possible matches (shared part number, not a government interchangeability claim): 5940-00-755-4399, 6685-00-998-2418, 5950-01-175-4667. Verify interchangeability with system specifications before substitution.
Key specifications for FN1418-428: Lubrication: SOLUBLE LUBRICANT; Overall Height: 0.292 INCHES MAXIMUM IN; Washer Outside Diameter: 0.409 INCHES MAXIMUM IN; Width Across Flats: 0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN. 19 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.