The Screw,close Tolerance, cataloged under National Stock Number 5305-01-439-4807, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-439-4807 |
| Primary Part Number | TX1027D3-3AF |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Head Height | 0.046 INCHES NOMINAL IN |
| Fastener Length | 0.532 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-83488,TY2,CLASS C MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.345 INCHES NOMINAL IN |
| Material Document and Classification | MCD23-112,CAGE76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.187 INCHES NOMINAL IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Internal Drive Style | CROSS RECESS TYPE IA |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| 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 | 0.265 INCHES MINIMUM AND 0.272 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 |
|---|---|
| 3M1170D3-3AF | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TX1027D3-3AF PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1170C3-3AF | Huck International, Inc (USA) |
| 11845D3-3AF | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1170D3-3AF | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11825D3-3AF | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1170C3-3AF | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027D3-3AF PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M1170C3-3AF | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| WC1170C3-3AF | West Coast Aerospace, Inc. (USA) |
| TX1027D3-3AF PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 3M1170C3-3AF | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M1170C3-3AF | Houston Precision Fasteners I Lp (USA) |
| TX1027D3-3AF PRIMARY | Hi-Shear Corporation (USA) |
| GS1014C3-3AF | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1170D3-3AF | Heartland Precision Fasteners Inc (USA) |
| TX1027D3-3AF PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| 10113816 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| TX1027D3-3AF | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies Inc |
| TX1027D3-3AF | 5/9 Secondary reference U.S. Government activity |
| TX1027D3-3AF | C/1 Advisory reference — outside the item-of-supply concept Fairchild Fasteners Europe - Vsd Gmbh |
| 3M1170C3-3AF | 5/2 Secondary reference U.S. Government activity |
| TX1027D3-3AF | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| 75305LLAZZW440 | 5/9 Secondary reference U.S. Government activity |
| 3M1170D3-3AF | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| TX1027D3-3AF | 3/2 Design control — primary reference U.S. Government activity |
| HP1170D3-3F | C/1 Advisory reference — outside the item-of-supply concept Heartland Precision Fasteners Inc |
NSN 5305-01-439-4807 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-439-4807 has 17 manufacturer part numbers on file: 3M1170D3-3AF (Fairchild Fasteners Europe - Vsd Gmbh), TX1027D3-3AF (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M1170C3-3AF (Huck International, Inc), 11845D3-3AF (Reid Products Inc. Dba Reid Products Inc), 3M1170D3-3AF (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 12 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-525-3903. Verify interchangeability with system specifications before substitution.
Key specifications for TX1027D3-3AF: Head Height: 0.046 INCHES NOMINAL IN; Fastener Length: 0.532 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-83488,TY2,CLASS C MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.345 INCHES NOMINAL IN. 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.