The Screw,close Tolerance, cataloged under National Stock Number 5305-01-101-8535, 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 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 18 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-101-8535 |
| Primary Part Number | ST3M455-5L4-1 |
| 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 | 0.766 INCHES MINIMUM AND 0.796 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.506 INCHES MINIMUM AND 0.556 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 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 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.429 INCHES MINIMUM AND 0.477 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 |
|---|---|
| HT4024L5-4-1 | Hi-Shear Corporation (USA) |
| 11907-5L4-1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M455-5L4-1 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4024L5-4-1 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4024L5-4-1 | Huck International, Inc (USA) |
| HT4024L5-4-1 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4024L5-4-1 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M455-5L4-1 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M455-5L4-1 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M455-5L4-1 | Heartland Precision Fasteners Inc (USA) |
| ST3M455-5L4-1 | Houston Precision Fasteners I Lp (USA) |
| HT4024L5-4-1 | Howmet Global Fastening Systems Inc (USA) |
| HT4024L5-4-1 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| WC4024L5-4 | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| HT402L5-4-1 | 5/9 Secondary reference Huck International, Inc |
| HT402L5-4-1 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| HT4024L5-4 | 5/9 Secondary reference Sps Technologies Ltd, Tj Brooks Division |
| HT4024L5-4 | 5/9 Secondary reference U.S. Government activity |
| HT402L5-4-1 | 5/9 Secondary reference Hi-Shear Corporation |
| HT402L5-4-1 | 5/9 Secondary reference Sps Technologies Ltd, Tj Brooks Division |
| HT4024L5-4 | 5/9 Secondary reference West Coast Aerospace, Inc. |
| HT4024L5-4 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4024L5-4 | 5/9 Secondary reference U.S. Government activity |
| HT402L5-4-1 | 5/9 Secondary reference U.S. Government activity |
| HT4024L5-4-1 | 5/2 Secondary reference U.S. Government activity |
| HT4024L5-4 | 5/9 Secondary reference Huck International, Inc |
| HT4024L5-4 | 5/9 Secondary reference Sps Technologies Inc |
| 10303326 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M455-5L4 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4024L5-4 | 5/9 Secondary reference Fastener Innovation Technology, Inc. Dba F I T |
| HT4024L5-4 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| HT4024L5-4 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5305-01-101-8535 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-101-8535 has 14 manufacturer part numbers on file: HT4024L5-4-1 (Hi-Shear Corporation), 11907-5L4-1 (Reid Products Inc. Dba Reid Products Inc), ST3M455-5L4-1 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), HT4024L5-4-1 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), HT4024L5-4-1 (Huck International, Inc) and 9 more.
Key specifications for ST3M455-5L4-1: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.766 INCHES MINIMUM AND 0.796 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.