The Screw,close Tolerance, cataloged under National Stock Number 5305-01-151-4128, 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 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-151-4128 |
| Primary Part Number | HT4048-4-16 |
| 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 | 1.301 INCHES MINIMUM AND 1.331 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.291 INCHES MINIMUM AND 0.341 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 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 | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.390 INCHES MINIMUM AND 0.395 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 |
|---|---|
| ST3M713-4-16-1 | West Coast Aerospace, Inc. (USA) |
| HT4048-4-16 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4048-4-16 PRIMARY | Hi-Shear Corporation (USA) |
| HT4048-4-16 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M713-4-16-1 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M713-4-16-1 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4048-4-16 PRIMARY | Huck International, Inc (USA) |
| 11929-4-16-1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M713-4-16-1 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| Reference | Meaning |
|---|---|
| HT4048-4-16 | 5/9 Secondary reference U.S. Government activity |
| HT4048-4-16 | 5/9 Secondary reference U.S. Government activity |
| 10115459 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4048-4-16 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4048-4-16 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M713-4-16-1 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5305-01-151-4128 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-151-4128 has 9 manufacturer part numbers on file: ST3M713-4-16-1 (West Coast Aerospace, Inc.), HT4048-4-16 (Howmet Global Fastening Systems Inc), HT4048-4-16 (Hi-Shear Corporation), HT4048-4-16 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M713-4-16-1 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc) and 4 more.
Key specifications for HT4048-4-16: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 1.301 INCHES MINIMUM AND 1.331 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.