The Screw,close Tolerance, cataloged under National Stock Number 5305-01-164-9729, 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 23 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-164-9729 |
| Primary Part Number | SC1779-7-29D |
| 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 |
| Fastener Length | 2.461 INCHES MINIMUM AND 2.508 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | NAS672 ASSN STD 1ST TREATMENT RESPONSE OR MIL-C-8837,TY 2,CL 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Length | 0.639 INCHES MINIMUM AND 0.706 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.096 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.802 INCHES MINIMUM AND 1.822 INCHES MAXIMUM IN |
| Grip Diameter | 0.7782 INCHES MINIMUM AND 0.7784 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 220000 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 | 20 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.153 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 0.826 INCHES MINIMUM AND 0.888 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 |
|---|---|
| SC1779-7-29D PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HR204-7-29D PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1202-7-29D PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HR204-7-29D PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 106706T-7-29D | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| GB510FD7-29D | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| GB510CE7-29D | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 106706T-7-29D | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-164-9729 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-164-9729 has 4 manufacturer part numbers on file: SC1779-7-29D (Howmet Global Fastening Systems Inc), HR204-7-29D (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), PBF1202-7-29D (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), HR204-7-29D (Hi-Shear Corporation).
Key specifications for SC1779-7-29D: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 2.461 INCHES MINIMUM AND 2.508 INCHES MAXIMUM IN; Surface Treatment Document and Classification: NAS672 ASSN STD 1ST TREATMENT RESPONSE OR MIL-C-8837,TY 2,CL 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL. 23 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.