The Screw,close Tolerance, cataloged under National Stock Number 5305-01-196-5579, 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 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-196-5579 |
| Primary Part Number | ST3M430V5-18AS |
| 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 | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.0878 INCHES MINIMUM AND 0.0899 INCHES MAXIMUM IN |
| Fastener Length | 1.640 INCHES MINIMUM AND 1.687 INCHES MAXIMUM IN |
| Thread Length | 0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Material Document and Classification | NAS 621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.6287 INCHES MINIMUM AND 0.6335 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 |
|---|---|
| ST3M430V5-18AS PRIMARY | The Boeing Company Div Defense (USA) |
| HT271A5-18 PRIMARY | Hi-Shear Corporation (USA) |
| 110179-5-18AS | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M430V5-18AS | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| HT8137-5-18AS PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| BM33024V5-18U PRIMARY | Huck International, Inc (USA) |
| HT271A5-18 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| BM33024V5-18U | 5/9 Secondary reference U.S. Government activity |
| 110179-5-18AS | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba PB Fasteners |
| 10113519 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT8137-5-18AS | 5/9 Secondary reference U.S. Government activity |
| ST3M430V5-18AS | C/1 Advisory reference — outside the item-of-supply concept Fastener Innovation Technology, Inc. Dba F I T |
| 110179-5-18AS | 3/2 Design control — primary reference U.S. Government activity |
| ST3M430V5-18AS | 5/2 Secondary reference U.S. Government activity |
| WC8137-5-18A | C/1 Advisory reference — outside the item-of-supply concept West Coast Aerospace, Inc. |
NSN 5305-01-196-5579 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-196-5579 has 7 manufacturer part numbers on file: ST3M430V5-18AS (The Boeing Company Div Defense), HT271A5-18 (Hi-Shear Corporation), 110179-5-18AS (Sps Technologies Ltd, Tj Brooks Division), ST3M430V5-18AS (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), HT8137-5-18AS (Howmet Global Fastening Systems Inc) and 2 more.
Key specifications for ST3M430V5-18AS: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.0878 INCHES MINIMUM AND 0.0899 INCHES MAXIMUM IN; Fastener Length: 1.640 INCHES MINIMUM AND 1.687 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.