The Screw,close Tolerance, cataloged under National Stock Number 5305-01-172-5571, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-172-5571 |
| Primary Part Number | PBF1417-4-3 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 0.575 INCHES MINIMUM AND 0.605 INCHES MAXIMUM IN |
| Thread Length | 0.378 INCHES MINIMUM AND 0.428 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4967 COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1580 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 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 | 28 |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.464 INCHES MINIMUM AND 0.507 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 |
|---|---|
| PBF1417-4-3 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| T009-4-3 | Huck International, Inc (USA) |
| 03A174-4-3 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| SLB146-4-3 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| HR240-4-3 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| AIC1652-4-3 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HR240-4-3 | Hi-Shear Corporation (USA) |
| SC3102-4-3 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| SC3102-4-3 | 5/9 Secondary reference Sps Technologies Inc |
| NAS1580V4T3 | 3/2 Design control — primary reference U.S. Government activity |
| 123743-4-3 | 5/2 Secondary reference U.S. Government activity |
| T009-4-3 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-172-5571 is a Screw,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-172-5571 has 8 manufacturer part numbers on file: PBF1417-4-3 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), T009-4-3 (Huck International, Inc), 03A174-4-3 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), SLB146-4-3 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), HR240-4-3 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 3 more.
Key specifications for PBF1417-4-3: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.575 INCHES MINIMUM AND 0.605 INCHES MAXIMUM IN; Thread Length: 0.378 INCHES MINIMUM AND 0.428 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.