The Screw,close Tolerance, cataloged under National Stock Number 5305-01-478-2862, 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 11 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-478-2862 |
| Primary Part Number | 3M1170-D4-23A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.046 INCHES MAXIMUM IN |
| Fastener Length | 1.427 INCHES MINIMUM AND 1.447 INCHES MAXIMUM IN |
| Thread Length | 0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN |
| Material Document and Classification | PH13-8MOCRES MFR REF 1ST MATERIAL RESPONSE OVERALL |
| 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 |
| Grip Length | 1.427 INCHES MINIMUM AND 1.447 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 2200 POUNDS PER SQUARE INCH LBS |
| 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 | STEEL COMP XM-13 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 |
|---|---|
| TX1027D4-23A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1027D4-23A | Howmet Global Fastening Systems Inc (USA) |
| TX1027D4-23A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1027D4-23A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TX1027D4-23A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11825-D4-23A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 11845-D4-23A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1170-D4-23A PRIMARY | The Boeing Company Div Defense (USA) |
| TX1027D4-23A | Hi-Shear Corporation (USA) |
| TX1027D4-23A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HP1170D4-23A | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| TX1027D4-23A | 5/9 Secondary reference Heartland Precision Fasteners Inc |
| TX1027D4-23A | 5/2 Secondary reference U.S. Government activity |
| TX1027D4-23A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-478-2862 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-478-2862 has 11 manufacturer part numbers on file: TX1027D4-23A (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), TX1027D4-23A (Howmet Global Fastening Systems Inc), TX1027D4-23A (Sps Technologies, Llc Dba PB Fasteners), TX1027D4-23A (Fairchild Fasteners Europe - Vsd Gmbh), TX1027D4-23A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 6 more.
Key specifications for 3M1170-D4-23A: Head Height: 0.046 INCHES MAXIMUM IN; Fastener Length: 1.427 INCHES MINIMUM AND 1.447 INCHES MAXIMUM IN; Thread Length: 0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN; Material Document and Classification: PH13-8MOCRES MFR REF 1ST MATERIAL RESPONSE OVERALL. 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.