The Screw,close Tolerance, cataloged under National Stock Number 5305-01-132-9801, 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 22 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-132-9801 |
| Primary Part Number | HT4054-4D15A |
| 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 | 1.348 INCHES MINIMUM AND 1.378 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488,TY 2,CL 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 |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN |
| 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 | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE 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 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.222 INCHES MINIMUM AND 1.272 INCHES MAXIMUM FIRST HOLE IN |
| 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 |
|---|---|
| ST3M730-4DL-15 | Houston Precision Fasteners I Lp (USA) |
| HT4054-4D15A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| WC4054-4DL15A PRIMARY | West Coast Aerospace, Inc. (USA) |
| ST3M730-4DL-15 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4054-4D15A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4054-4D15A PRIMARY | Hi-Shear Corporation (USA) |
| HT4054-4DL-15A PRIMARY | Huck International, Inc (USA) |
| HT4054-4D15A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| ST3M730-4DL15 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M730-4D15 | 5/9 Secondary reference The Boeing Company Div Defense |
| 10115337 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4054-4D15A | 3/2 Design control — primary reference U.S. Government activity |
| HT4054-4D15 | 5/9 Secondary reference U.S. Government activity |
| HT4054-4D15 | 5/9 Secondary reference U.S. Government activity |
| HT4054-4D15 | 5/9 Secondary reference Hi-Shear Corporation |
| HT4054-4D15A | 5/9 Secondary reference U.S. Government activity |
| HT4054-4D15A | 5/9 Secondary reference U.S. Government activity |
| HT4054-4D15A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-132-9801 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-132-9801 has 8 manufacturer part numbers on file: ST3M730-4DL-15 (Houston Precision Fasteners I Lp), HT4054-4D15A (Howmet Global Fastening Systems Inc), WC4054-4DL15A (West Coast Aerospace, Inc.), ST3M730-4DL-15 (Fastener Innovation Technology, Inc. Dba F I T), HT4054-4D15A (Sps Technologies Ltd, Tj Brooks Division) and 3 more.
Key specifications for HT4054-4D15A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 1.348 INCHES MINIMUM AND 1.378 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488,TY 2,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 22 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.