The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-449-5433, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Div Huck Products Division. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-449-5433 |
| Primary Part Number | D16161-2 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc. Div Huck Products Division |
| Status | ACTIVE |
| Width Across Flats | 0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN |
| Head Height | 0.225 INCHES MINIMUM IN |
| Fastener Length | 1.230 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-26074 CL 1, GRADE 8, MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.230 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN |
| Material Document and Classification | NAS1351-4 ASSN STD SINGLE MATERIAL RESPONSE AND FF-S-86 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT FILLISTER |
| Thread Direction | RIGHT-HAND |
| Nonstandard Thread Pitch Diameter | +0.1897 TO 0.1928 INCHES IN |
| Surface Treatment | NICKEL OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNRF |
| Head Diameter | 0.365 INCHES MINIMUM AND 0.375 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 |
|---|---|
| D16161-2 PRIMARY | Huck International, Inc. Div Huck Products Division (USA) |
| 11454937-3 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| D16161-2 | 5/9 Secondary reference U.S. Government activity |
| 79078-4-20 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5305-01-449-5433 is a Screw,cap,socket Head, manufactured by Huck International, Inc. Div Huck Products Division, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-449-5433 has 2 manufacturer part numbers on file: D16161-2 (Huck International, Inc. Div Huck Products Division), 11454937-3 (Us Army Aviation and Missile Command).
Key specifications for D16161-2: Width Across Flats: 0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN; Head Height: 0.225 INCHES MINIMUM IN; Fastener Length: 1.230 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-26074 CL 1, GRADE 8, MIL SPEC SINGLE TREATMENT 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.