The Screw,externally Relieved Body, cataloged under National Stock Number 5305-00-979-8987, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Brooks Automation, Inc. Div Cti Cryogenics. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-979-8987 |
| Primary Part Number | 394826 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Brooks Automation, Inc. Div Cti Cryogenics |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.186 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN |
| Head Diameter | 0.389 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN |
| Distance From Centerline to Flat | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Head Height | 0.189 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN |
| Second Diameter From Head | 0.197 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Quantity Per Inch | 20 |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 2.148 INCHES MINIMUM AND 2.196 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.125 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.486 INCHES MINIMUM AND 1.518 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Third Diameter From Head | 0.250 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| First Diameter From Head | 0.250 INCHES NOMINAL IN |
| Head Style | DEE CHAMFER |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.943 INCHES MINIMUM AND 0.959 INCHES MAXIMUM IN |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | STEEL COMP 4340 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 5305-00-979-8987 is a Screw,externally Relieved Body, manufactured by Brooks Automation, Inc. Div Cti Cryogenics, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-979-8987 has 2 cross-referenced part numbers: 394826 (Brooks Automation, Inc. Div Cti Cryogenics), A1-4826 (Brooks Automation, Inc. Div Cti Cryogenics).
There is 1 known substitute for 5305-00-979-8987: 5320-00-058-9890. Verify interchangeability with system specifications before substitution.
Key specifications for 394826: Fourth Diameter From Head: 0.186 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN; Head Diameter: 0.389 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN; Distance From Centerline to Flat: 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN; Head Height: 0.189 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN. 22 total characteristics are documented in the Federal Logistics Information System.