The Screw,close Tolerance, cataloged under National Stock Number 5305-01-526-3878, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Valley-Todeco, Inc. Dba Arconic Fastening Systems. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 17 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-526-3878 |
| Primary Part Number | 3M1170V4-15A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Point Diameter | 0.425 INCHES NOMINAL IN |
| Fastener Length | 1.348 INCHES MINIMUM AND 1.378 INCHES MAXIMUM IN |
| Thread Length | 0.420 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN |
| Spline Major Diameter | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Grip Diameter | 0.249 INCHES NOMINAL IN |
| Internal Drive Style | TORX |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.385 INCHES MINIMUM AND 0.394 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 |
|---|---|
| TX1027V4-15A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| 3M1170V4-15A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M1170V4-15A | Houston Precision Fasteners I Lp (USA) |
| TX1027V4-15A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1027V4-15A PRIMARY | Huck International, Inc (USA) |
| TX1027V4-15A | Howmet Global Fastening Systems Inc (USA) |
| TX1027V4-15A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| WC1170V4-15A | West Coast Aerospace, Inc. (USA) |
| TX1027V4-15A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TX1027V4-15A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 11845V4-15A PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| GS1014V4-15A PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1170V4-15A PRIMARY | Saturn Fasteners Inc (USA) |
| 3M1170V4-15A PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 3M1170V4-15A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| TX1027V4-15A | Hi-Shear Corporation (USA) |
| 3M1170V4-15A PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10328870 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| TX1027V4-15A | 5/2 Secondary reference U.S. Government activity |
| TX1027V4-15A | 3/2 Design control — primary reference U.S. Government activity |
| TX1027V4-15A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-526-3878 is a Screw,close Tolerance, manufactured by Valley-Todeco, Inc. Dba Arconic Fastening Systems, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-526-3878 has 17 manufacturer part numbers on file: TX1027V4-15A (Fairchild Fasteners Europe - Vsd Gmbh), 3M1170V4-15A (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 3M1170V4-15A (Houston Precision Fasteners I Lp), TX1027V4-15A (Sps Technologies, Llc Dba PB Fasteners), TX1027V4-15A (Huck International, Inc) and 12 more.
Key specifications for 3M1170V4-15A: Point Diameter: 0.425 INCHES NOMINAL IN; Fastener Length: 1.348 INCHES MINIMUM AND 1.378 INCHES MAXIMUM IN; Thread Length: 0.420 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN; Spline Major Diameter: 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN. 17 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.