The Screw,close Tolerance, cataloged under National Stock Number 5305-01-439-4782, 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 12 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-439-4782 |
| Primary Part Number | 3M1170C4-23A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.060 INCHES NOMINAL IN |
| Fastener Length | 1.862 INCHES NOMINAL IN |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Material Document and Classification | MDA23-118,CAGE76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.437 INCHES NOMINAL IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE IA |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.358 INCHES MINIMUM AND 0.365 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 |
|---|---|
| GS1014C4-23A | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1170C4-23A PRIMARY | The Boeing Company Div Defense (USA) |
| 11825C4-23A | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027C4-23A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1027C4-23A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1027C4-23A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| TX1027C4-23A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TX1027C4-23A | Hi-Shear Corporation (USA) |
| TX1027C4-23A | Howmet Global Fastening Systems Inc (USA) |
| TX1027C4-23A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11845C4-23A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1170C4-23A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| 10113815 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| TX1027C4-23A | 5/9 Secondary reference Sps Technologies Inc |
| TX1027C4-23A | 5/2 Secondary reference U.S. Government activity |
| TX1027C4-23A | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-439-4782 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-439-4782 has 12 manufacturer part numbers on file: GS1014C4-23A (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), 3M1170C4-23A (The Boeing Company Div Defense), 11825C4-23A (Reid Products Inc. Dba Reid Products Inc), TX1027C4-23A (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), TX1027C4-23A (Sps Technologies, Llc Dba PB Fasteners) and 7 more.
Key specifications for 3M1170C4-23A: Head Height: 0.060 INCHES NOMINAL IN; Fastener Length: 1.862 INCHES NOMINAL IN; Thread Length: 0.425 INCHES NOMINAL IN; Material Document and Classification: MDA23-118,CAGE76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL. 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.