The Screw,close Tolerance, cataloged under National Stock Number 5305-00-283-4586, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-283-4586 |
| Primary Part Number | ST3M430V4-6AS |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Fastener Length | 0.828 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Thread Length | 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Material Document and Classification | NAS621 COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OR AMS4928 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 | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.5 DEGREES MINIMUM AND 100.5 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.502 INCHES MINIMUM AND 0.507 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 |
|---|---|
| 110179-4-6AS | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M430V4-6AS PRIMARY | Huck International, Inc (USA) |
| ST3M430V4-6AS | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M430V4-6AS PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M430V4-6AS PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M430V4-6AS PRIMARY | Hi-Shear Corporation (USA) |
| ST3M430V4-6AS PRIMARY | Huck International, Inc. Div Huck Products Division (USA) |
| Reference | Meaning |
|---|---|
| BM33024V4-6U | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| WC8137-4-6A | C/1 Advisory reference — outside the item-of-supply concept West Coast Aerospace, Inc. |
| 110179-4-6AS | 5/9 Secondary reference U.S. Government activity |
| 110179-4-6AS | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M430V4-6AS | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M430V4-6AS | 3/2 Design control — primary reference U.S. Government activity |
| ST3M430V4-6AS | C/1 Advisory reference — outside the item-of-supply concept Fastener Innovation Technology, Inc. Dba F I T |
| HT271A4-6 | 5/9 Secondary reference Hi-Shear Corporation |
| HT8137-4-6AS | 5/9 Secondary reference U.S. Government activity |
| BM33024V4-6U | 5/9 Secondary reference U.S. Government activity |
NSN 5305-00-283-4586 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-283-4586 has 7 manufacturer part numbers on file: 110179-4-6AS (Sps Technologies Ltd, Tj Brooks Division), ST3M430V4-6AS (Huck International, Inc), ST3M430V4-6AS (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), ST3M430V4-6AS (Howmet Global Fastening Systems Inc), ST3M430V4-6AS (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 2 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-310-9996. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M430V4-6AS: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Fastener Length: 0.828 INCHES MINIMUM AND 0.875 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.