The Screw,close Tolerance, cataloged under National Stock Number 5305-01-170-5560, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-170-5560 |
| Primary Part Number | HT123-3-24P |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 1.890 INCHES MINIMUM AND 1.937 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.3765 INCHES MINIMUM AND 0.3813 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 |
|---|---|
| HT123-3-24P PRIMARY | Huck International, Inc (USA) |
| 3M123-3-24P PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT3N-24P PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT1029A-3-24P PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT3N-24P PRIMARY | Hi-Shear Corporation (USA) |
| 54291-3-24P PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 3M123-3-24P | 5/2 Secondary reference U.S. Government activity |
| HT1029A-3-24P | 5/9 Secondary reference U.S. Government activity |
| E128-3-24P | 5/9 Secondary reference Huck International, Inc |
| HT123-3-24P | 5/9 Secondary reference U.S. Government activity |
| 3M123-3-24P | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| E128-3-24P | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-170-5560 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-170-5560 has 6 manufacturer part numbers on file: HT123-3-24P (Huck International, Inc), 3M123-3-24P (Fastener Innovation Technology, Inc. Dba F I T), HT3N-24P (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT1029A-3-24P (Howmet Global Fastening Systems Inc), HT3N-24P (Hi-Shear Corporation) and 1 more.
Key specifications for HT123-3-24P: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 1.890 INCHES MINIMUM AND 1.937 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT 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.