The Screw,machine, cataloged under National Stock Number 5305-00-620-0597, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-620-0597 |
| Primary Part Number | 343585 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Fastener Length | 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | IRON ALLOY 660 |
| Nonstandard Thread Pitch Diameter | +0.1644 TO 0.1667 INCHES IN |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 82.0 DEGREES NOMINAL |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNF |
| Head Diameter | 0.359 INCHES MINIMUM AND 0.385 INCHES MAXIMUM 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 |
|---|---|
| 343585 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 343585 | Linread Ltd (GBR) |
| 343585 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 343585 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| 343585 | 5/2 Secondary reference U.S. Government activity |
| 343585 | 5/9 Secondary reference North Bridge Fasteners Div of North Bridge Ltd |
| 343585 | 5/2 Secondary reference U.S. Government activity |
| 343585 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-00-620-0597 is a Screw,machine, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-620-0597 has 4 manufacturer part numbers on file: 343585 (Sps Technologies, Llc Dba PB Fasteners), 343585 (Linread Ltd), 343585 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 343585 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-466-0969. Verify interchangeability with system specifications before substitution.
Key specifications for 343585: Fastener Length: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN; Screw Material Document and Classification: AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE; Thread Length: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN; Hardness Rating: 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM. 14 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.