The Screw,close Tolerance, cataloged under National Stock Number 5305-01-008-2892, 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 20 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-008-2892 |
| Primary Part Number | HT193LB4H9 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Fastener Length | 0.972 INCHES MINIMUM AND 1.019 INCHES MAXIMUM IN |
| Thread Length | 0.400 INCHES MINIMUM AND 0.467 INCHES MAXIMUM IN |
| Material Document and Classification | NAS621,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | PAN |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R54520 OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.037 INCHES NOMINAL IN |
| Head Diameter | 0.473 INCHES MINIMUM AND 0.492 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 |
|---|---|
| HT193LB4H9 PRIMARY | Hi-Shear Corporation (USA) |
| HT193LB4H9 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| HT8099-4D9 | 3/2 Design control — primary reference U.S. Government activity |
| 67077D4-9 | 3/2 Design control — primary reference U.S. Government activity |
| GB511J4D9 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| GB511JD9 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| 67077D4-9 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5305-01-008-2892 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-008-2892 has 2 manufacturer part numbers on file: HT193LB4H9 (Hi-Shear Corporation), HT193LB4H9 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for HT193LB4H9: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN; Fastener Length: 0.972 INCHES MINIMUM AND 1.019 INCHES MAXIMUM IN. 20 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.