The Screw,close Tolerance, cataloged under National Stock Number 5305-01-477-5617, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-477-5617 |
| Primary Part Number | ST3M652C4-15A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Head Height | 0.0713 INCHES MINIMUM AND 0.0733 INCHES MAXIMUM IN |
| Fastener Length | 1.3905 INCHES MINIMUM AND 1.4375 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS5629, PH13-8MO ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT AND O RING |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.9275 INCHES MINIMUM AND 0.9475 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 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 | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.456 INCHES MINIMUM 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 |
|---|---|
| ST3M652C4-15A PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 11925C4-15A | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4020-4-15A | Hi-Shear Corporation (USA) |
| WC4020-4-15A | West Coast Aerospace, Inc. (USA) |
| HT4020-4-15A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4020-4-15A PRIMARY | Huck International, Inc (USA) |
| ST3M652C4-15A | Houston Precision Fasteners I Lp (USA) |
| ST3M652C4-15A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4020-4-15A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M652C4-15A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4020-4-15A PRIMARY | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4020-4-15A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4020-4-15A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4020-4-15A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M652C4-15A PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT4020-4-15A | 3/2 Design control — primary reference U.S. Government activity |
| HT4020-4-15A | 3/2 Design control — primary reference U.S. Government activity |
| HT4020-4-15A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-477-5617 is a Screw,close Tolerance, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-477-5617 has 15 manufacturer part numbers on file: ST3M652C4-15A (Heartland Precision Fasteners Inc), 11925C4-15A (Reid Products Inc. Dba Reid Products Inc), HT4020-4-15A (Hi-Shear Corporation), WC4020-4-15A (West Coast Aerospace, Inc.), HT4020-4-15A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 10 more.
Key specifications for ST3M652C4-15A: Head Height: 0.0713 INCHES MINIMUM AND 0.0733 INCHES MAXIMUM IN; Fastener Length: 1.3905 INCHES MINIMUM AND 1.4375 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.469 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.