The Screw,close Tolerance, cataloged under National Stock Number 5305-01-717-4261, 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 24 specifications, cited from the U.S. Government catalog. The record lists 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-717-4261 |
| Primary Part Number | ST3M652C7-26A |
| 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 | 125.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES HEAD |
| Head Height | 0.096 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Fastener Length | 2.265 INCHES MINIMUM AND 2.312 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2700,METHOD 1 OR 2 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.656 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5629 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE FASTENER |
| Single Shear Strength | ERR-060 |
| Nominal Thread Diameter | 0.4375 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT AND O RING |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-652C7 MANUFACTURERS STANDARD |
| Grip Length | 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 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 | 20 |
| Material | STEEL COMP XM-13 FASTENER |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.8812 INCHES MINIMUM AND 0.8884 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 |
|---|---|
| ST3M652C7-26A | Heartland Precision Fasteners Inc (USA) |
| 11925C7-26A | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4020-7-26A | Hi-Shear Corporation (USA) |
| ST3M652C7-26A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4020-7-26A | Huck International, Inc (USA) |
| HT4020-7-26A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| WC4020-7-26A | West Coast Aerospace, Inc. (USA) |
| ST3M652C7-26A | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M652C7-26A PRIMARY | The Boeing Company Div Defense (USA) |
| HT4020-7-26A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HT4020-7-26A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4020-7-26A | Howmet Global Fastening Systems Inc (USA) |
| HT4020-7-26A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M652C7-26A | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| HT4020-7-26A | 5/2 Secondary reference U.S. Government activity |
| HT4020-7-26A | 5/2 Secondary reference U.S. Government activity |
| ST3M652C7 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 5305-01-717-4261 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-717-4261 has 14 manufacturer part numbers on file: ST3M652C7-26A (Heartland Precision Fasteners Inc), 11925C7-26A (Reid Products Inc. Dba Reid Products Inc), HT4020-7-26A (Hi-Shear Corporation), ST3M652C7-26A (Fastener Innovation Technology, Inc. Dba F I T), HT4020-7-26A (Huck International, Inc) and 9 more.
Key specifications for ST3M652C7-26A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 125.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES HEAD; Head Height: 0.096 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN. 24 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.