The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-196-3253, 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 15 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-196-3253 |
| Primary Part Number | H49661-8 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.825 INCHES MINIMUM AND 0.835 INCHES MAXIMUM IN |
| Width Across Flats | 0.553 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MAXIMUM DEGF |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | PASSIVATE OVERALL |
| Countersink Angle | 120.0 DEGREES NOMINAL WASHER |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| H49661-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| TLN1023CD3-8N PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TLN1023CD3-8N | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TLN1023CD3-8N PRIMARY | Huck International, Inc (USA) |
| TLN1023CD3-8N | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| 10110132 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| TLN1023CD3-8N | 5/9 Secondary reference U.S. Government activity |
| ST3M468C8M | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| TLN1023CD3-8N | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-196-3253 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-196-3253 has 5 manufacturer part numbers on file: H49661-8 (Howmet Global Fastening Systems Inc), TLN1023CD3-8N (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), TLN1023CD3-8N (Sps Technologies, Llc Dba PB Fasteners), TLN1023CD3-8N (Huck International, Inc), TLN1023CD3-8N (Reid Products Inc. Dba Reid Products Inc).
Key specifications for H49661-8: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN; Washer Outside Diameter: 0.825 INCHES MINIMUM AND 0.835 INCHES MAXIMUM IN; Width Across Flats: 0.553 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN. 15 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.