The Screw,close Tolerance, cataloged under National Stock Number 5305-01-027-2004, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-027-2004 |
| Primary Part Number | HT271-3-13 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN |
| Fastener Length | 1.203 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Thread Length | 0.381 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Material Document and Classification | NAS621,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | TITANIUM ALLOY UNS R54520 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.376 INCHES MINIMUM AND 0.381 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 |
|---|---|
| 110179-3-13 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT271-3-13 PRIMARY | Hi-Shear Corporation (USA) |
| HT271-3-13 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BM33024V3-13 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M430V3-13D | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT8137-3-13 | 5/2 Secondary reference U.S. Government activity |
| HT8137-3-13 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 110179-3-13 | 3/2 Design control — primary reference U.S. Government activity |
| BM33024V3-13 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-027-2004 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-027-2004 has 4 manufacturer part numbers on file: 110179-3-13 (Sps Technologies Ltd, Tj Brooks Division), HT271-3-13 (Hi-Shear Corporation), HT271-3-13 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BM33024V3-13 (Huck International, Inc).
Key specifications for HT271-3-13: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN; Fastener Length: 1.203 INCHES MINIMUM AND 1.250 INCHES MAXIMUM 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.