The Screw,close Tolerance, cataloged under National Stock Number 5305-01-101-8536, 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 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-101-8536 |
| Primary Part Number | ST3M455-7L12M |
| 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 | 1.391 INCHES MINIMUM AND 1.421 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.631 INCHES MINIMUM AND 0.681 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 | 0.740 INCHES MINIMUM AND 0.760 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 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.612 INCHES MINIMUM AND 0.672 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 |
|---|---|
| ST3M455-7L12M PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M455-7L12M | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4024L7-12M | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4024L7-12M | Huck International, Inc (USA) |
| ST3M455-7L12M | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4024L7-12M | Hi-Shear Corporation (USA) |
| WC4024L7-12M | West Coast Aerospace, Inc. (USA) |
| HT4024L7-12M | Howmet Global Fastening Systems Inc (USA) |
| 11907-7L12M | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M455-7L12M | 5/9 Secondary reference Sps Technologies Inc |
| HT4024L7-12M | 5/9 Secondary reference U.S. Government activity |
| ST3M455-7L12M | 5/9 Secondary reference Huck International, Inc |
| HT4024L7-12M | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4024L7-12M | 5/2 Secondary reference U.S. Government activity |
| HT4024L7-12M | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-101-8536 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-101-8536 has 9 manufacturer part numbers on file: ST3M455-7L12M (The Boeing Company Div Defense), ST3M455-7L12M (Sps Technologies Ltd, Tj Brooks Division), HT4024L7-12M (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4024L7-12M (Huck International, Inc), ST3M455-7L12M (Fastener Innovation Technology, Inc. Dba F I T) and 4 more.
Key specifications for ST3M455-7L12M: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 1.391 INCHES MINIMUM AND 1.421 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.