The Screw,close Tolerance, cataloged under National Stock Number 5305-01-496-9487, 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 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-496-9487 |
| Primary Part Number | ST3M652C6-12D |
| 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 | 0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN |
| Fastener Length | 1.375 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.641 INCHES NOMINAL IN |
| Material Document and Classification | AMS5629, COMP XM-13 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.750 INCHES NOMINAL IN |
| Grip Diameter | 0.374 INCHES MINIMUM AND 0.375 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 | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.756 INCHES MINIMUM AND 0.760 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 |
|---|---|
| WC4020-6-12 | West Coast Aerospace, Inc. (USA) |
| HT40206-12 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M652C6-12D | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4020-6-12 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4020-6-12 | Hi-Shear Corporation (USA) |
| HT4020-6-12 | Howmet Global Fastening Systems Inc (USA) |
| ST3M652C6-12D PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT4020-6-12 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-496-9487 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-496-9487 has 7 manufacturer part numbers on file: WC4020-6-12 (West Coast Aerospace, Inc.), HT40206-12 (Sps Technologies Ltd, Tj Brooks Division), ST3M652C6-12D (Fastener Innovation Technology, Inc. Dba F I T), HT4020-6-12 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4020-6-12 (Hi-Shear Corporation) and 2 more.
Key specifications for ST3M652C6-12D: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN; Fastener Length: 1.375 INCHES MINIMUM AND 1.422 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.