The Screw,close Tolerance, cataloged under National Stock Number 5305-01-514-3354, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 18 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-514-3354 |
| Primary Part Number | ST3M557-4-10 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.015 INCHES NOMINAL IN |
| Fastener Length | 1.094 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Material Document and Classification | AMS5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FILLISTER COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.625 INCHES NOMINAL IN |
| Grip Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | NICKEL ALLOY 718 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 |
|---|---|
| ST3M557-4-10 | Linread Ltd (GBR) |
| HT4024-4-10 | Huck International, Inc (USA) |
| ST3M557-4-10 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4024-4-10 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M557-4-10 | Saturn Fasteners Inc (USA) |
| ST3M557-4-10 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M557-4-10 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| HT4024-4-10 | Hi-Shear Corporation (USA) |
| ST3M557-4-10 | Houston Precision Fasteners I Lp (USA) |
| HT4024-4-10 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4024-4-10 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4024-4-10 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M557-4-10 | Camcar Llc Div Camcar Llc (USA) |
| ST3M557-4-10 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| WC4024-4-10 | West Coast Aerospace, Inc. (USA) |
| 11923-4-10 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4024-4-10 | Howmet Global Fastening Systems Inc (USA) |
| ST3M557-4-10 | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4024-4-10 | 5/9 Secondary reference Sps Technologies Inc |
| HT4027-4-10 | 5/1 Secondary reference Hi-Shear Corporation |
| HT4024L4-10 | 5/9 Secondary reference U.S. Government activity |
| HT4024-4-10 | 5/2 Secondary reference U.S. Government activity |
| HT4024-4-10 | 5/2 Secondary reference U.S. Government activity |
| ST3M557-10-1 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4024L4-10 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4024L4-10 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5305-01-514-3354 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-514-3354 has 18 manufacturer part numbers on file: ST3M557-4-10 (Linread Ltd), HT4024-4-10 (Huck International, Inc), ST3M557-4-10 (Fastener Innovation Technology, Inc. Dba F I T), HT4024-4-10 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M557-4-10 (Saturn Fasteners Inc) and 13 more.
Key specifications for ST3M557-4-10: Head Height: 0.015 INCHES NOMINAL IN; Fastener Length: 1.094 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.469 INCHES NOMINAL IN. 18 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.