The Screw,close Tolerance, cataloged under National Stock Number 5305-01-129-6941, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Ltd, Tj Brooks Division. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 15 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-129-6941 |
| Primary Part Number | ST3M730-5L12 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Ltd, Tj Brooks Division |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 1.204 INCHES MINIMUM AND 1.234 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 | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 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 | 24 |
| Material | STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.578 INCHES MINIMUM AND 0.634 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 |
|---|---|
| ST3M730-5L12 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4054-5-12A | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4054-5-12 | 5/9 Secondary reference U.S. Government activity |
| ST3M730-5L12 | 5/9 Secondary reference The Boeing Company Div Defense |
| ST3M730-5L12 | 5/9 Secondary reference Fastener Innovation Technology, Inc. Dba F I T |
| HT4054-5-12A | 5/2 Secondary reference U.S. Government activity |
| ST3M730-5-12 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4054-5-12A | 5/9 Secondary reference Huck International, Inc |
| HT4054-5-12A | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| HT4054-5-12A | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| HT4054-5-12 | 5/9 Secondary reference Hi-Shear Corporation |
| ST3M730-5L12 | 5/9 Secondary reference West Coast Aerospace, Inc. |
| 3036AS190-5L12 | 3/1 Design control — primary reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| HT4054-5-12A | 5/2 Secondary reference U.S. Government activity |
| HT4054-5-12A | 5/9 Secondary reference U.S. Government activity |
| HT4054-5-12 | 5/9 Secondary reference U.S. Government activity |
| 10115209 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-129-6941 is a Screw,close Tolerance, manufactured by Sps Technologies Ltd, Tj Brooks Division, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-129-6941 has 2 manufacturer part numbers on file: ST3M730-5L12 (Sps Technologies Ltd, Tj Brooks Division), HT4054-5-12A (Hi-Shear Corporation).
Key specifications for ST3M730-5L12: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 1.204 INCHES MINIMUM AND 1.234 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.