The Screw,machine, cataloged under National Stock Number 5305-01-481-3940, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-481-3940 |
| Primary Part Number | 16991-4C20 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Thread Direction | RIGHT-HAND |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| Head Diameter | 0.480 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Screw Material | STEEL CORROSION RESISTING |
| Thread Quantity Per Inch | 20 |
| Head Style | FLAT COUNTERSUNK |
| Thread Series Designator | UNRC |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Class | 3A A |
| Fastener Length | 1.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 16991-4C20 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 31094 | Sps Technologies Inc Unbrako Div (USA) |
| 31094 | Sps Technologies, Llc Dba PB Fasteners (USA) |
NSN 5305-01-481-3940 is a Screw,machine, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-01-481-3940 has 3 cross-referenced part numbers: 16991-4C20 (Sps Technologies, Llc Dba PB Fasteners), 31094 (Sps Technologies Inc Unbrako Div), 31094 (Sps Technologies, Llc Dba PB Fasteners).
There are 9 known substitutes for 5305-01-481-3940: 3040-00-720-1456, 5940-00-849-1696, 5340-01-109-2828 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for 16991-4C20: Thread Direction: RIGHT-HAND; Countersink Angle: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM; Head Diameter: 0.480 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN; Screw Material: STEEL CORROSION RESISTING. 10 total characteristics are documented in the Federal Logistics Information System.