The Screw,close Tolerance, cataloged under National Stock Number 5305-01-129-9059, 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 20 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-129-9059 |
| Primary Part Number | HT4020-5-15A |
| 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 |
| Head Height | 0.088 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Fastener Length | 1.453 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN |
| Thread Length | 0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.629 INCHES MINIMUM AND 0.634 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 |
|---|---|
| HT4020-5-15A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4020-5-15A PRIMARY | Huck International, Inc (USA) |
| HT4020-5-15A PRIMARY | Hi-Shear Corporation (USA) |
| ST3M652C5-15A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4020-5-15A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4020-5-15A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M652C5-15A | West Coast Aerospace, Inc. (USA) |
| WC4020-3-15A PRIMARY | West Coast Aerospace, Inc. (USA) |
| ST3M652C5-15A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| HT4020-5-15A | 5/9 Secondary reference U.S. Government activity |
| ST3M652C5-15A | 5/9 Secondary reference Bikor Corp |
| ST3M652C5-15A | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4020-5-15A | 5/9 Secondary reference U.S. Government activity |
| HT4020-5-15A | 5/1 Secondary reference Houston Precision Fasteners I Lp |
| HT4020-5-15A | 5/1 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| HT4020-5-15A | 5/1 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| HT4020-5-15A | 3/2 Design control — primary reference U.S. Government activity |
| HT4020-5-15A | 5/1 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4020-5-15A | 5/1 Secondary reference Reid Products Inc. Dba Reid Products Inc |
| HT4020-5-15A | 5/1 Secondary reference Heartland Precision Fasteners Inc |
| HT4020-5-15A | 5/1 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| ST3M652C5-15A | 5/9 Secondary reference Sps Technologies Inc |
| 10115220 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-129-9059 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-129-9059 has 9 manufacturer part numbers on file: HT4020-5-15A (Howmet Global Fastening Systems Inc), HT4020-5-15A (Huck International, Inc), HT4020-5-15A (Hi-Shear Corporation), ST3M652C5-15A (Sps Technologies Ltd, Tj Brooks Division), HT4020-5-15A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 4 more.
Key specifications for HT4020-5-15A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.088 INCHES MINIMUM AND 0.090 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.