The Screw,close Tolerance, cataloged under National Stock Number 5305-01-420-3603, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 8 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-420-3603 |
| Primary Part Number | SC3102-5-40 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| 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 | 2.954 INCHES MINIMUM AND 2.984 INCHES MAXIMUM IN |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.577 INCHES MINIMUM AND 0.635 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 |
|---|---|
| SC3102-5-40 | Howmet Global Fastening Systems Inc (USA) |
| PBF1417-5-40 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HR240-5-40 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| SLB146-5-40 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| 03A174-5-40 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| T009-5-40 | Huck International, Inc (USA) |
| HR240-5-40 | Hi-Shear Corporation (USA) |
| AIC1652-5-40 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| 03A174-5-40 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
| 03A174-5-40 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| T009-5-40 | 5/9 Secondary reference U.S. Government activity |
| 123743-5-40 | 5/2 Secondary reference U.S. Government activity |
| SC3102-5-40 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-420-3603 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-420-3603 has 8 manufacturer part numbers on file: SC3102-5-40 (Howmet Global Fastening Systems Inc), PBF1417-5-40 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), HR240-5-40 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), SLB146-5-40 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), 03A174-5-40 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems) and 3 more.
Key specifications for SC3102-5-40: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 2.954 INCHES MINIMUM AND 2.984 INCHES MAXIMUM IN. 19 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.