The Screw,close Tolerance, cataloged under National Stock Number 5305-01-101-3328, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 17 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through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-101-3328 |
| Primary Part Number | HT4068-6-16A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 1.626 INCHES MINIMUM AND 1.656 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488 TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 101.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.510 INCHES MINIMUM AND 0.564 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 |
|---|---|
| HT4068-6-16A PRIMARY | Hi-Shear Corporation (USA) |
| 3M926-6L16 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4068-6-16 PRIMARY | Hi-Shear Corporation (USA) |
| HT4068-6-16 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4068-6-16A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M926-6L16 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M926-6L16 PRIMARY | The Boeing Company Div Defense (USA) |
| 3M926-6-16 PRIMARY | The Boeing Company Div Defense (USA) |
| 11883-6-16/11883-6L16 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4068-6-16 | 5/9 Secondary reference U.S. Government activity |
| HT4068-6-16A | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT4068-6-16 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 3M926-6L16 | 5/2 Secondary reference U.S. Government activity |
| HT4068-6-16 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT4068-6-16A | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4068-6-16 | 3/2 Design control — primary reference U.S. Government activity |
| HT4068-6-16A | 3/2 Design control — primary reference U.S. Government activity |
| HT4068-6-16 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4068-6-16A | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4068-6-16 | 5/9 Secondary reference U.S. Government activity |
| HT4068-6-16A | 5/9 Secondary reference U.S. Government activity |
| HT4068-6-16A | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-101-3328 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-101-3328 has 9 manufacturer part numbers on file: HT4068-6-16A (Hi-Shear Corporation), 3M926-6L16 (Sps Technologies Ltd, Tj Brooks Division), HT4068-6-16 (Hi-Shear Corporation), HT4068-6-16 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4068-6-16A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 4 more.
Key specifications for HT4068-6-16A: Fastener Length: 1.626 INCHES MINIMUM AND 1.656 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488 TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN; Material Document and Classification: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 17 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.