The Screw,close Tolerance, cataloged under National Stock Number 5305-01-377-0946, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-377-0946 |
| Primary Part Number | 64494-4-24 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Width Across Flats | 0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN |
| Head Height | 0.263 INCHES NOMINAL IN |
| Fastener Length | 1.938 INCHES MINIMUM AND 1.958 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.438 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.500 INCHES MINIMUM AND 1.520 INCHES MAXIMUM IN |
| Grip Diameter | 0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 630 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.3737 INCHES MINIMUM AND 0.3742 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 |
|---|---|
| 64494-4-24 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| C630-4-24 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-377-0946 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-377-0946 has 1 manufacturer part number on file: 64494-4-24 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 64494-4-24: Width Across Flats: 0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN; Head Height: 0.263 INCHES NOMINAL IN; Fastener Length: 1.938 INCHES MINIMUM AND 1.958 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.