The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-164-6409, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-164-6409 |
| Primary Part Number | H19817-836 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Washer Outside Diameter | 0.266 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Width Across Flats | 0.212 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Temp Rating | 1200.0 FAHRENHEIT NOMINAL DEGF |
| Washer Thickness | 0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5537 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.164 INCHES IN |
| Specification/standard Data | 07482--50T421 MANUFACTURERS SPECIFICATION |
| Nondefinitive Spec/std Data | D CLASS |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | SILVER OVERALL |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 36 |
| Material | IRON ALLOY 660 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 |
|---|---|
| H19817-836 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HCG8WN-08-S | National Aerospace Fasteners Corporation |
| Reference | Meaning |
|---|---|
| H19817-836 | 5/9 Secondary reference Klx Aerospace Solutions II SAS |
| R1181P002C | 5/9 Secondary reference U.S. Government activity |
| R1181P002 | 1/2 Source control — Government-approved source U.S. Government activity |
| R1181 | D/9 Drawing number reference only U.S. Government activity |
| 5310PL0145220 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5310-00-164-6409 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-164-6409 has 2 manufacturer part numbers on file: H19817-836 (Howmet Global Fastening Systems Inc), HCG8WN-08-S (National Aerospace Fasteners Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5905-01-149-5386. Verify interchangeability with system specifications before substitution.
Key specifications for H19817-836: Overall Height: 0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Washer Outside Diameter: 0.266 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN; Width Across Flats: 0.212 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 17 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.