The Screw,lead,ball Bearing, cataloged under National Stock Number 5305-01-181-3681, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Beaver Aerospace & Defense, Inc.. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-181-3681 |
| Primary Part Number | B18919C |
| Item Name | Screw,lead,ball Bearing |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Beaver Aerospace & Defense, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | CORROSION RESISTANT STEEL,AMS 5643,TYPE 17-4PH; 4.025 IN. LG.; 0.687 IN. DIA.; HEAT TREATMENT: PRECIPITATION HARDEN BALL NUT AND BALL SCREW TO COND. H900,HARDNESS,ROCKWELL C 41-47,PER AMS 5643 IN |
| Cubic Measure | 1.89968 CUBIC INCHES |
| 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 |
|---|---|
| B18919C PRIMARY | Beaver Aerospace & Defense, Inc. (USA) |
| 9338377 | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| Reference | Meaning |
|---|---|
| M-305-18919 | 3/9 Design control — primary reference Beaver Aerospace & Defense, Inc. |
NSN 5305-01-181-3681 is a Screw,lead,ball Bearing, manufactured by Beaver Aerospace & Defense, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-181-3681 has 2 manufacturer part numbers on file: B18919C (Beaver Aerospace & Defense, Inc.), 9338377 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for B18919C: General Characteristics Item Description: CORROSION RESISTANT STEEL,AMS 5643,TYPE 17-4PH; 4.025 IN. LG.; 0.687 IN. DIA.; HEAT TREATMENT: PRECIPITATION HARDEN BALL NUT AND BALL SCREW TO COND. H900,HARDNESS,ROCKWELL C 41-47,PER AMS 5643 IN; Cubic Measure: 1.89968 CUBIC INCHES. 2 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.