The Screw,close Tolerance, cataloged under National Stock Number 5305-01-477-5835, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Heartland Precision Fasteners Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 15 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-477-5835 |
| Primary Part Number | ST3M652C5-19A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Head Height | 0.0878 INCHES MINIMUM AND 0.0898 INCHES MAXIMUM IN |
| Fastener Length | 1.7025 INCHES MINIMUM AND 1.7495 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.531 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS5629, PH13-8MO ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Features Provided | O RING AND CETYL ALCOHOL LUBRICANT |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.1775 INCHES MINIMUM AND 1.1975 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE FASTENER |
| 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 FASTENER |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.575 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| HT4020-5-19A | Huck International, Inc (USA) |
| HT4020-5-19A | Hi-Shear Corporation (USA) |
| HT4020-5-19A | Howmet Global Fastening Systems Inc (USA) |
| ST3M652C5-19A PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 11925C5-19A PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M652C5-19A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4020-5-19A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4020-5-19A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4020-5-19A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M652C5-19A PRIMARY | The Boeing Company Div Defense (USA) |
| HT4020-5-19A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4020-5-19A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M652C5-19A | Houston Precision Fasteners I Lp (USA) |
| WC4020-5-19A | West Coast Aerospace, Inc. (USA) |
| ST3M652C5-19A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| HT4020-5-19A | 5/9 Secondary reference Sps Technologies Inc |
| HT4020-5-19A | 3/2 Design control — primary reference U.S. Government activity |
| HT4020-5-19A | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-477-5835 is a Screw,close Tolerance, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-477-5835 has 15 manufacturer part numbers on file: HT4020-5-19A (Huck International, Inc), HT4020-5-19A (Hi-Shear Corporation), HT4020-5-19A (Howmet Global Fastening Systems Inc), ST3M652C5-19A (Heartland Precision Fasteners Inc), 11925C5-19A (Reid Products Inc. Dba Reid Products Inc) and 10 more.
Key specifications for ST3M652C5-19A: Head Height: 0.0878 INCHES MINIMUM AND 0.0898 INCHES MAXIMUM IN; Fastener Length: 1.7025 INCHES MINIMUM AND 1.7495 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE FASTENER; Thread Length: 0.531 INCHES NOMINAL 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.