The Screw,close Tolerance, cataloged under National Stock Number 5305-01-133-2195, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 11 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 22 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-133-2195 |
| Primary Part Number | ST3M740-4L8 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 0.954 INCHES MINIMUM AND 0.984 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488 TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 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 |
|---|---|
| HT4053-4-8A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M740-4L8 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4053-4-8A | Howmet Global Fastening Systems Inc (USA) |
| HT4053-4-8A | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| HT4053-4-8A | Hi-Shear Corporation (USA) |
| ST3M740-4L8 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M740-4L8 PRIMARY | Hi-Shear Corporation (USA) |
| HT4053-4-8A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4053-4-8A | Huck International, Inc (USA) |
| HT4053-4-8A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4053-4-8A | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| ST3M740-4-8 | 5/9 Secondary reference U.S. Government activity |
| HT4053-4-8A | 5/9 Secondary reference U.S. Government activity |
| HT4053-4-8A | 5/2 Secondary reference U.S. Government activity |
| HT4053-4-8 | 5/9 Secondary reference U.S. Government activity |
| HT4053-4-8 | 5/9 Secondary reference U.S. Government activity |
| ST3M740-4-8 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4053-4-8 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| ST3M740-4-8 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT4053-4-8 | 5/9 Secondary reference Hi-Shear Corporation |
| ST3M740-4L8 | 5/9 Secondary reference Fastener Innovation Technology, Inc. Dba F I T |
| HT4053-4-8A | 5/9 Secondary reference U.S. Government activity |
| HT4053-4-8 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M740-4L8 | 5/9 Secondary reference Huck International, Inc |
| ST3M740-4L8 | 5/9 Secondary reference Sps Technologies Ltd, Tj Brooks Division |
| HT4053-4-8 | 5/9 Secondary reference U.S. Government activity |
| ST3M740-4L8 | 5/9 Secondary reference U.S. Government activity |
| 10115343 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M740-4L8 | 5/9 Secondary reference West Coast Aerospace, Inc. |
| ST3M740-4L8 | 5/9 Secondary reference The Boeing Company Div Defense |
| ST3M740-4L8 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-133-2195 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-133-2195 has 11 manufacturer part numbers on file: HT4053-4-8A (Sps Technologies Ltd, Tj Brooks Division), ST3M740-4L8 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4053-4-8A (Howmet Global Fastening Systems Inc), HT4053-4-8A (Howmet Global Fastening Systems Inc Div City of Industry Operations), HT4053-4-8A (Hi-Shear Corporation) and 6 more.
Key specifications for ST3M740-4L8: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.954 INCHES MINIMUM AND 0.984 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488 TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 21 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.