The Screw,close Tolerance, cataloged under National Stock Number 5305-01-129-6939, 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 21 specifications, cited from the U.S. Government catalog. The record lists 12 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through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-129-6939 |
| Primary Part Number | HT4054-4-5A |
| 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 | 0.722 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488 TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.464 INCHES MINIMUM AND 0.506 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 |
|---|---|
| ST3M730-4L5 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M730-4L5 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4054-4-5A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M730-4L5 | Howmet Global Fastening Systems Inc (USA) |
| 303AS190-4L5 PRIMARY | Marvin Engineering Co, Inc (USA) |
| 3036AS190-4L5 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| ST3M730-4L5 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M730-4L5 | Hi-Shear Corporation (USA) |
| ST3M730-4L5 | West Coast Aerospace, Inc. (USA) |
| ST3M730-4L5 PRIMARY | Huck International, Inc (USA) |
| HT4054-4-5A | Huck International, Inc (USA) |
| ST3M730-4L5 | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| HT4054-4-5A | 5/9 Secondary reference U.S. Government activity |
| ST3M730-4L5 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M730-4L5 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| HT4054-4-5 | 5/9 Secondary reference Hi-Shear Corporation |
| HT4054-4-5 | 5/9 Secondary reference U.S. Government activity |
| 303AS190-4L5 | 5/2 Secondary reference U.S. Government activity |
| ST3M730-4L5 | 5/2 Secondary reference U.S. Government activity |
| HT4054-4-5A | 5/9 Secondary reference Hi-Shear Corporation |
| HT4054-4-5 | 5/9 Secondary reference U.S. Government activity |
| ST3M730-4-5 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4054-4-5A | 5/9 Secondary reference U.S. Government activity |
| HT4054-4-5A | 5/9 Secondary reference U.S. Government activity |
| ST3M730-4L5 | 5/9 Secondary reference Sps Technologies Inc |
| 10115207 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-129-6939 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-129-6939 has 12 manufacturer part numbers on file: ST3M730-4L5 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), ST3M730-4L5 (Sps Technologies Ltd, Tj Brooks Division), HT4054-4-5A (Howmet Global Fastening Systems Inc), ST3M730-4L5 (Howmet Global Fastening Systems Inc), 303AS190-4L5 (Marvin Engineering Co, Inc) and 7 more.
Key specifications for HT4054-4-5A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.722 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488 TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 21 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.