The Screw,close Tolerance, cataloged under National Stock Number 5305-01-475-3401, 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 17 specifications, cited from the U.S. Government catalog. The record lists 13 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-475-3401 |
| Primary Part Number | 3M1169C4-21A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.110 INCHES NOMINAL IN |
| Fastener Length | 1.722 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Spline Major Diameter | 0.219 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.312 INCHES NOMINAL IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| 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 | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.4970 INCHES MINIMUM AND 0.5066 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 |
|---|---|
| GS1006C4-21A | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| TX1026C4-21A | Howmet Global Fastening Systems Inc (USA) |
| TX1026C4-21A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11827C4-21A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1169C4-21A | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| TX1026C4-21A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TX1026C4-21A | Hi-Shear Corporation (USA) |
| 3M1169C4-21A PRIMARY | The Boeing Company Div Defense (USA) |
| 3M1169C4-21A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| TX1026C4-21A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| TX1026C4-21A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| WC1169C4-21A | West Coast Aerospace, Inc. (USA) |
| TX1026C4-21A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| TX1026C4-21A | 5/2 Secondary reference U.S. Government activity |
| 10113832 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-475-3401 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-475-3401 has 13 manufacturer part numbers on file: GS1006C4-21A (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), TX1026C4-21A (Howmet Global Fastening Systems Inc), TX1026C4-21A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 11827C4-21A (Reid Products Inc. Dba Reid Products Inc), 3M1169C4-21A (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc) and 8 more.
Key specifications for 3M1169C4-21A: Head Height: 0.110 INCHES NOMINAL IN; Fastener Length: 1.722 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN; Thread Length: 0.425 INCHES NOMINAL IN; Spline Major Diameter: 0.219 INCHES MINIMUM AND 0.222 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.