The Nut,special, cataloged under National Stock Number 5310-00-941-0168, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-941-0168 |
| Primary Part Number | 494197 |
| Item Name | Nut,special |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| General Characteristics Item Description | CRES,SILVER PLATED,0.4375-20 UNJF 3B THD,0.616 IN. MIN 0.627 @IN. MAX ACROSS FLATS ON BASE HEX,0.553 IN. MIN 0.564 IN. MAX ACROSS FLATS ON TOP HEX,0.484 IN. MIN 0.504 IN. MAX H 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 |
|---|---|
| 494197 | Esna, Llc (USA) |
| 494197 | Kito Mfg Co. Ltd (JPN) |
| 494197 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 494197 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 494197 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 494197 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 494197 | 5/9 Secondary reference Mnr Tool Engineering Inc |
| 494197 | 5/9 Secondary reference Harvard Industries Inc |
| 494197 | 5/2 Secondary reference U.S. Government activity |
| 494197 | 5/9 Secondary reference Kito Mfg Co. Ltd |
NSN 5310-00-941-0168 is a Nut,special, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-941-0168 has 5 manufacturer part numbers on file: 494197 (Esna, Llc), 494197 (Kito Mfg Co. Ltd), 494197 (Sps Technologies, Llc Dba PB Fasteners), 494197 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 494197 (Howmet Global Fastening Systems Inc).
Key specifications for 494197: General Characteristics Item Description: CRES,SILVER PLATED,0.4375-20 UNJF 3B THD,0.616 IN. MIN 0.627 @IN. MAX ACROSS FLATS ON BASE HEX,0.553 IN. MIN 0.564 IN. MAX ACROSS FLATS ON TOP HEX,0.484 IN. MIN 0.504 IN. MAX H IN. 1 specification is 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.