The Screw,close Tolerance, cataloged under National Stock Number 5305-01-138-4707, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 16 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-138-4707 |
| Primary Part Number | HT4025L6-13 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 1.438 INCHES MINIMUM AND 1.468 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 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 | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.692 INCHES MINIMUM AND 0.763 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 |
|---|---|
| ST3M454-6L13 | Houston Precision Fasteners I Lp (USA) |
| 11905-6L13 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4025L6-13 PRIMARY | Huck International, Inc (USA) |
| ST3M454-6L13 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4025L6-13 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4025L6-13 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4025L6-13 PRIMARY | Hi-Shear Corporation (USA) |
| WC4025L-6-13 | West Coast Aerospace, Inc. (USA) |
| HT4025L6-13 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4025L6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M454-6L13 | West Coast Aerospace, Inc. (USA) |
| ST3M454-6L13 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M454-6L13 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4025L613 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M454-6L13 | Heartland Precision Fasteners Inc (USA) |
| HT4025L6-13 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| HT4025L6-13 | 5/9 Secondary reference U.S. Government activity |
| HT4025L6-13 | 3/2 Design control — primary reference U.S. Government activity |
| HT4025L6-13 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-138-4707 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-138-4707 has 16 manufacturer part numbers on file: ST3M454-6L13 (Houston Precision Fasteners I Lp), 11905-6L13 (Reid Products Inc. Dba Reid Products Inc), HT4025L6-13 (Huck International, Inc), ST3M454-6L13 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), HT4025L6-13 (Howmet Global Fastening Systems Inc) and 11 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-251-4198. Verify interchangeability with system specifications before substitution.
Key specifications for HT4025L6-13: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 1.438 INCHES MINIMUM AND 1.468 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.