The Screw,close Tolerance, cataloged under National Stock Number 5305-01-447-6589, 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 16 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-447-6589 |
| Primary Part Number | 3M1170V4-16A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.063 INCHES NOMINAL IN |
| Fastener Length | 1.410 INCHES MINIMUM AND 1.440 INCHES MAXIMUM IN |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| 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 | 0.357 INCHES MINIMUM AND 0.398 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 |
|---|---|
| TX1027V4-16A | Hi-Shear Corporation (USA) |
| TX1027V4-16A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1170V4-16A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M1170V4-16A PRIMARY | The Boeing Company Div Defense (USA) |
| 3M1170V4-16A | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| GS1014V4-16A | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| TX1027V4-16A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| TX1027V4-16A | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| TX1027V4-16A | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba PB Fasteners |
| TX1027V4-16A | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| TX1027V4-16A | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 10113825 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| TX1027V4-16A | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies Inc |
| TX1027V4-5-10 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba PB Fasteners |
NSN 5305-01-447-6589 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-447-6589 has 7 manufacturer part numbers on file: TX1027V4-16A (Hi-Shear Corporation), TX1027V4-16A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M1170V4-16A (Fastener Innovation Technology, Inc. Dba F I T), 3M1170V4-16A (The Boeing Company Div Defense), 3M1170V4-16A (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc) and 2 more.
Key specifications for 3M1170V4-16A: Head Height: 0.063 INCHES NOMINAL IN; Fastener Length: 1.410 INCHES MINIMUM AND 1.440 INCHES MAXIMUM IN; Thread Length: 0.425 INCHES NOMINAL IN; Nominal Thread Diameter: 0.250 INCHES IN. 16 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.