The Screw,close Tolerance, cataloged under National Stock Number 5305-01-129-6934, 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 8 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-129-6934 |
| Primary Part Number | ST3M430V5-20AS |
| 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 GRIP |
| Head Height | 0.088 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Fastener Length | 1.765 INCHES MINIMUM AND 1.812 INCHES MAXIMUM IN |
| Thread Length | 0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Material Document and Classification | NAS621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.240 INCHES MINIMUM AND 1.260 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 UNS R54520 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.629 INCHES MINIMUM AND 0.634 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 |
|---|---|
| HT271A5-20 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BM33024V5-20U | Huck International, Inc (USA) |
| ST3M430V5-20AS | Houston Precision Fasteners I Lp (USA) |
| 110179-5-20AS | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT8137-5-20AS | Howmet Global Fastening Systems Inc (USA) |
| ST3M430V5-20AS PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M430V5-20AS | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT271A5-20 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| BM33024V5-20U | 5/9 Secondary reference U.S. Government activity |
| ST3M430V5-20AS | 5/9 Secondary reference Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc |
| 110179-5-20AS | 5/2 Secondary reference U.S. Government activity |
| HT8137-5-20AS | 5/9 Secondary reference U.S. Government activity |
| 10115203 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| WC8137-5-20A | C/1 Advisory reference — outside the item-of-supply concept West Coast Aerospace, Inc. |
NSN 5305-01-129-6934 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-129-6934 has 8 manufacturer part numbers on file: HT271A5-20 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BM33024V5-20U (Huck International, Inc), ST3M430V5-20AS (Houston Precision Fasteners I Lp), 110179-5-20AS (Sps Technologies Ltd, Tj Brooks Division), HT8137-5-20AS (Howmet Global Fastening Systems Inc) and 3 more.
Key specifications for ST3M430V5-20AS: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.088 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN; Fastener Length: 1.765 INCHES MINIMUM AND 1.812 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.