The Screw,close Tolerance, cataloged under National Stock Number 5305-01-344-5533, 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 17 specifications, cited from the U.S. Government catalog. The record lists 11 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-344-5533 |
| Primary Part Number | ST3M430V4-9ASM |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.051 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN |
| Fastener Length | 1.015 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Material Document and Classification | AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | DRY FILM LUBRICANT AND O RING |
| Head Style | FILLISTER COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| 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 | TITANIUM ALLOY UNS R56400 OVERALL |
| 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 |
|---|---|
| ST3M430V4-9ASM | Hi-Shear Corporation (USA) |
| HT8137-4-9ASM | Howmet Global Fastening Systems Inc (USA) |
| ST3M430V4-9ASM PRIMARY | The Boeing Company Div Defense (USA) |
| HT271A4-9M | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M430V4-9ASM | Howmet Global Fastening Systems Inc (USA) |
| ST3M430V4-9ASM | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M430V4-9ASM | Huck International, Inc (USA) |
| HT271A4-9M | Hi-Shear Corporation (USA) |
| ST3M430V4-9ASM | Houston Precision Fasteners I Lp (USA) |
| ST3M430V4-9ASM | West Coast Aerospace, Inc. (USA) |
| ST3M430V4-9ASM | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| HT8137-4-9ASM | 5/9 Secondary reference Sps Technologies Inc |
| HT8137-4-9ASM | 5/9 Secondary reference U.S. Government activity |
| ST3M430V4-9ASM | 5/2 Secondary reference U.S. Government activity |
| ST3M430V4-9ASM | 5/2 Secondary reference U.S. Government activity |
| 110179-4-9ASM | 5/2 Secondary reference U.S. Government activity |
| ST3M430V4-9ASM | 5/9 Secondary reference Roneo President Ltd |
NSN 5305-01-344-5533 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-344-5533 has 11 manufacturer part numbers on file: ST3M430V4-9ASM (Hi-Shear Corporation), HT8137-4-9ASM (Howmet Global Fastening Systems Inc), ST3M430V4-9ASM (The Boeing Company Div Defense), HT271A4-9M (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M430V4-9ASM (Howmet Global Fastening Systems Inc) and 6 more.
Key specifications for ST3M430V4-9ASM: Head Height: 0.051 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN; Fastener Length: 1.015 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN; Thread Length: 0.469 INCHES NOMINAL IN; Material Document and Classification: AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 17 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.