The Screw,close Tolerance, cataloged under National Stock Number 5305-01-138-7235, 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 19 specifications, cited from the U.S. Government catalog. The record lists 13 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-138-7235 |
| Primary Part Number | ST3M454-7L25 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 2.222 INCHES MINIMUM AND 2.252 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.650 INCHES MINIMUM AND 0.700 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 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 | 20 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.810 INCHES MINIMUM AND 0.889 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 |
|---|---|
| HT4025L7-25 | Howmet Global Fastening Systems Inc (USA) |
| ST3M454-7L25 | Houston Precision Fasteners I Lp (USA) |
| ST3M454-7L25 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M454-7L25 | West Coast Aerospace, Inc. (USA) |
| HT4025L7-25 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M454-7L25 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M454-7L25 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HT4025L7-25 | Hi-Shear Corporation (USA) |
| HT4025L7-25 | Huck International, Inc (USA) |
| 11905-7L25 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M454-7L25 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M454-7L25 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M454-7L25 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HT4025L7-25 | 5/9 Secondary reference U.S. Government activity |
| ST3M454-7L25 | 5/2 Secondary reference U.S. Government activity |
| HT4025L7-25 | 5/9 Secondary reference U.S. Government activity |
| HT4025L7-25 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-138-7235 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-138-7235 has 13 manufacturer part numbers on file: HT4025L7-25 (Howmet Global Fastening Systems Inc), ST3M454-7L25 (Houston Precision Fasteners I Lp), ST3M454-7L25 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), ST3M454-7L25 (West Coast Aerospace, Inc.), HT4025L7-25 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 8 more.
Key specifications for ST3M454-7L25: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 2.222 INCHES MINIMUM AND 2.252 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.