The Screw,close Tolerance, cataloged under National Stock Number 5305-01-733-9240, 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 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-733-9240 |
| Primary Part Number | 3M938-4-8-5 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.080 INCHES MINIMUM AND 0.084 INCHES MAXIMUM IN |
| Fastener Length | 0.7975 INCHES MINIMUM AND 0.8275 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488, TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.3125 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5629 PH13-8MO AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Head Style | FILLISTER COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Grip Length | 0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Minimum Tensile Strength | 125000 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 XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.3898 INCHES MINIMUM AND 0.3948 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 |
|---|---|
| HT4072-4-8-5 | Howmet Global Fastening Systems Inc (USA) |
| HT4072-4-8-5 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HT4072-4-8-5 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M938-4-8-5 | Houston Precision Fasteners I Lp (USA) |
| HT4072-4-8-5 | Hi-Shear Corporation (USA) |
| 3M938-4-8-5 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| WC4072-4-8-5 | West Coast Aerospace, Inc. (USA) |
| HT4072-4-8-5 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4072-4-8-5 | Huck International, Inc (USA) |
| HT4072-4-8-5 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| 3M938-4-8-5 PRIMARY | The Boeing Company Div Defense (USA) |
| 3M938-4-8-5 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 11889-4-8-5 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M938-4-8-5 | Hayes Manufacturing Company, Incorporated Div Hayes Manufacturing Co Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4072-4-8-5 | 5/2 Secondary reference U.S. Government activity |
| HT4072-4-8-5 | 5/2 Secondary reference U.S. Government activity |
| 3M938 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 5305-01-733-9240 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-733-9240 has 14 manufacturer part numbers on file: HT4072-4-8-5 (Howmet Global Fastening Systems Inc), HT4072-4-8-5 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HT4072-4-8-5 (Sps Technologies, Llc Dba PB Fasteners), 3M938-4-8-5 (Houston Precision Fasteners I Lp), HT4072-4-8-5 (Hi-Shear Corporation) and 9 more.
Key specifications for 3M938-4-8-5: Head Height: 0.080 INCHES MINIMUM AND 0.084 INCHES MAXIMUM IN; Fastener Length: 0.7975 INCHES MINIMUM AND 0.8275 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488, TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.3125 INCHES NOMINAL IN. 20 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.