The Screw,close Tolerance, cataloged under National Stock Number 5305-01-418-9853, 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 22 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through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-418-9853 |
| Primary Part Number | 3M1170D3-4AF |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 0.580 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488 TY 2 CL C MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.345 INCHES NOMINAL IN |
| Material Document and Classification | 23-112, CAGE76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Spline Major Diameter | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Single Shear Strength | ERR-060 |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE OVERALL |
| Internal Drive Style | TORX |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.2650 INCHES MINIMUM AND 0.3016 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 |
|---|---|
| TX1027D3-4AF | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HP1170D3-4AF | Heartland Precision Fasteners Inc (USA) |
| TX1027D3-4AF | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1027D3-4AF | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| 3M1170D3-4AF PRIMARY | The Boeing Company Div Defense (USA) |
| TX1027D3-4AF | Howmet Global Fastening Systems Inc (USA) |
| TX1027D3-4AF | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11825D3-4AF/11825D3-4F | Reid Products Inc. Dba Reid Products Inc (USA) |
| 11845D3-4AF/11845D3-4F | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027D3-4AF | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1027D3-4AF | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| TX1027D3-4AF | 5/2 Secondary reference U.S. Government activity |
| 3M1170D3-4F | 5/9 Secondary reference The Boeing Company Div Defense |
| TX1027D3-4AF | 5/9 Secondary reference Heartland Precision Fasteners Inc |
| TX1027D3-4AF | 5/2 Secondary reference U.S. Government activity |
| TX1027D3-4F | 5/9 Secondary reference U.S. Government activity |
| TX1027D3-4F | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Voi-Shan Products |
| TX1027D3-4F | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| TX1027D3-4AF | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies Inc |
| TX1027D3-4F | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| TX1027D3-4F | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HP1170D3-4F | C/1 Advisory reference — outside the item-of-supply concept Heartland Precision Fasteners Inc |
| TX1027D3-4F | 5/9 Secondary reference Hi-Shear Corporation |
| TX1027D3-4F | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
NSN 5305-01-418-9853 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-418-9853 has 11 manufacturer part numbers on file: TX1027D3-4AF (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), HP1170D3-4AF (Heartland Precision Fasteners Inc), TX1027D3-4AF (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), TX1027D3-4AF (Fairchild Fasteners Europe - Vsd Gmbh), 3M1170D3-4AF (The Boeing Company Div Defense) and 6 more.
Key specifications for 3M1170D3-4AF: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 0.580 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN. 22 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.