The Screw,close Tolerance, cataloged under National Stock Number 5305-01-175-0608, 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 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-175-0608 |
| Primary Part Number | 3M926-3DL4 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 0.641 INCHES MINIMUM AND 0.671 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488 TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.381 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE 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 | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.520 INCHES MINIMUM AND 0.560 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.297 INCHES MINIMUM AND 0.302 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 |
|---|---|
| HT4068-3D4A | Howmet Global Fastening Systems Inc (USA) |
| 3M926-3D4 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M926-3DL4 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4068-3D4A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4068-3D4A | Hi-Shear Corporation (USA) |
| HT4068-3D4A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4068-3D4A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4068-3D4A | Huck International, Inc (USA) |
| WC4068-3D4 | West Coast Aerospace, Inc. (USA) |
| 11883-3DL4/11883-3D4 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4068-3D4 | 5/9 Secondary reference U.S. Government activity |
| HT4068-3D4 | 5/9 Secondary reference Hi-Shear Corporation |
| HT4068-3D4A | 5/9 Secondary reference Fastener Innovation Technology, Inc. Dba F I T |
| HT4068-3D4 | 5/9 Secondary reference U.S. Government activity |
| HT4068-3D4A | 5/2 Secondary reference U.S. Government activity |
| WC4024L3D4 | 5/9 Secondary reference West Coast Aerospace, Inc. |
| HT4068-3D4 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4068-3D4 | 5/9 Secondary reference U.S. Government activity |
| 3M926-3D4 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5305-01-175-0608 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-175-0608 has 10 manufacturer part numbers on file: HT4068-3D4A (Howmet Global Fastening Systems Inc), 3M926-3D4 (Fastener Innovation Technology, Inc. Dba F I T), 3M926-3DL4 (The Boeing Company Div Defense), HT4068-3D4A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4068-3D4A (Hi-Shear Corporation) and 5 more.
Key specifications for 3M926-3DL4: Fastener Length: 0.641 INCHES MINIMUM AND 0.671 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488 TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.381 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM FIRST HOLE IN. 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.