The Screw,close Tolerance, cataloged under National Stock Number 5305-01-496-9577, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 20 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-496-9577 |
| Primary Part Number | ST3M652C3-9D |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN |
| Fastener Length | 0.952 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.406 INCHES NOMINAL IN |
| Material Document and Classification | AMS5629, COMP XM-13 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.562 INCHES NOMINAL IN |
| Grip Diameter | 0.189 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.377 INCHES MINIMUM AND 0.381 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 |
|---|---|
| ST3M652C3-9D | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4020-3-9 | Howmet Global Fastening Systems Inc (USA) |
| WC4020-3-9 | West Coast Aerospace, Inc. (USA) |
| ST3M652C3-9D PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5305-01-496-9577 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-496-9577 has 4 manufacturer part numbers on file: ST3M652C3-9D (Fastener Innovation Technology, Inc. Dba F I T), HT4020-3-9 (Howmet Global Fastening Systems Inc), WC4020-3-9 (West Coast Aerospace, Inc.), ST3M652C3-9D (The Boeing Company Div Defense).
Key specifications for ST3M652C3-9D: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN; Fastener Length: 0.952 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN. 20 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.