The Screw,close Tolerance, cataloged under National Stock Number 5305-01-720-0300, 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 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-720-0300 |
| Primary Part Number | ST3M430V4-11ASM |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.0713 INCHES MINIMUM AND 0.0733 INCHES MAXIMUM IN |
| Fastener Length | 1.1405 INCHES MINIMUM AND 1.1875 INCHES MAXIMUM IN |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Material Document and Classification | 6AL-4V PER NAS621 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE FASTENER V |
| Material Document and Classification | ST3-251 MFR REF SINGLE MATERIAL RESPONSE RING |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Features Provided | DRY FILM LUBRICANT AND CETYL ALCOHOL LUBRICANT |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-430 MANUFACTURERS STANDARD |
| Grip Length | 0.6775 INCHES MINIMUM AND 0.6975 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY FASTENER |
| Material | RUBBER FLUOROSILICONE CLASS FQ RING |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.5018 INCHES MINIMUM AND 0.5066 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 |
|---|---|
| ST3M430V4-11ASM PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M430V4-11ASM | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT8137-4-11ASM | Howmet Global Fastening Systems Inc (USA) |
| BM33024V4-11UM | Huck International, Inc (USA) |
| HT271A4-11M | Hi-Shear Corporation (USA) |
| 110179-4-11ASM | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M430V4-11ASM | Houston Precision Fasteners I Lp (USA) |
| WC8137-4-11AM | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| ST3M430 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 110179-4-11ASM | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-720-0300 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-720-0300 has 8 manufacturer part numbers on file: ST3M430V4-11ASM (The Boeing Company Div Defense), ST3M430V4-11ASM (Fastener Innovation Technology, Inc. Dba F I T), HT8137-4-11ASM (Howmet Global Fastening Systems Inc), BM33024V4-11UM (Huck International, Inc), HT271A4-11M (Hi-Shear Corporation) and 3 more.
Key specifications for ST3M430V4-11ASM: Head Height: 0.0713 INCHES MINIMUM AND 0.0733 INCHES MAXIMUM IN; Fastener Length: 1.1405 INCHES MINIMUM AND 1.1875 INCHES MAXIMUM IN; Thread Length: 0.469 INCHES NOMINAL IN; Material Document and Classification: 6AL-4V PER NAS621 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE FASTENER V. 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.