The Screw,close Tolerance, cataloged under National Stock Number 5305-01-199-1334, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is West Coast Aerospace, Inc.. Government technical data includes 18 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-199-1334 |
| Primary Part Number | ST3M430V4-4AS |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | West Coast Aerospace, Inc. |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.0713 INCHES MINIMUM AND 0.0733 INCHES MAXIMUM IN |
| Fastener Length | 0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Thread Length | 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4967,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 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 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 |
|---|---|
| ST3M430V4-4AS PRIMARY | West Coast Aerospace, Inc. (USA) |
| ST3M430V4-4AS PRIMARY | Huck International, Inc (USA) |
| HT271A4-4 | Hi-Shear Corporation (USA) |
| ST3M430V4-4AS PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M430V4-4AS PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M430V4-4AS PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M430V4-4AS | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT271A4-4 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| BM33024V4-4U | 5/9 Secondary reference U.S. Government activity |
| 110179-4-4AS | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba PB Fasteners |
| 110179-4-4AS | 5/2 Secondary reference U.S. Government activity |
| HT8137-4-4AS | 5/9 Secondary reference U.S. Government activity |
| BM33024V4-4U | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5305-01-199-1334 is a Screw,close Tolerance, manufactured by West Coast Aerospace, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-199-1334 has 8 manufacturer part numbers on file: ST3M430V4-4AS (West Coast Aerospace, Inc.), ST3M430V4-4AS (Huck International, Inc), HT271A4-4 (Hi-Shear Corporation), ST3M430V4-4AS (Fastener Innovation Technology, Inc. Dba F I T), ST3M430V4-4AS (Howmet Global Fastening Systems Inc) and 3 more.
Key specifications for ST3M430V4-4AS: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.0713 INCHES MINIMUM AND 0.0733 INCHES MAXIMUM IN; Fastener Length: 0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN. 18 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.