The Cylinder Assembly,hydraulic Brak, cataloged under National Stock Number 2530-00-391-3979, is classified within Federal Supply Class 2530 (Vehicular Brake, Steering, Axle, Wheel, and Track Components) of the Vehicular Equipment Components group. The manufacturer of record is Federal Mogul Corp Sub Wagner Brake Moog Automotive Div. Government technical data includes 28 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2530-00-391-3979 |
| Primary Part Number | FD5998 |
| Item Name | Cylinder Assembly,hydraulic Brak |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | Federal Mogul Corp Sub Wagner Brake Moog Automotive Div |
| Status | ACTIVE |
| First End Fork Depth | 0.281 INCHES NOMINAL ALL WORKING ENDS IN |
| Mounting Facility Thread Class | 2B |
| Bleeding Feature Quantity | 1 |
| Compressed Length | 3.625 INCHES NOMINAL IN |
| Piston Rod End Similarity | IDENTICAL |
| Extended Length | 3.625 INCHES NOMINAL IN |
| Design Characteristics | DOUBLE ACTING SINGLE CYLINDER |
| Port Thread Series Designator | UNF SINGLE PORT |
| Mounting Position | RIGHT |
| Mounting Provision Arrangement Style | THREE HOLE TRIANGULAR |
| First Piston Rod End Style | SLOT TYPE ALL WORKING ENDS |
| Longest Vertical Distance Between Mounting Centers | 1.375 INCHES NOMINAL IN |
| Shortest Horizontal Distance Between Mounting Centers | 1.875 INCHES NOMINAL IN |
| Mounting Facility Thread Quantity Per Inch | 18 |
| Bore Type | STEPPED |
| Port Thread Class | 2B SINGLE PORT |
| Features Provided | RUBBER BOOT |
| Port Thread Quantity Per Inch | 20 SINGLE PORT |
| Mounting Facility Thread Length | 0.375 INCHES NOMINAL IN |
| Port Thread Diameter | 0.438 INCHES NOMINAL SINGLE PORT IN |
| Mounting Facility Thread Diameter | 0.312 INCHES NOMINAL IN |
| Port Location and Quantity | 1 CENTER SECTION |
| Port Style | GASKET SEAL SINGLE PORT |
| Mounting Facility Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Mounting Type and Location | FLANGE CENTER SECTION |
| Mounting Facility Thread Direction | RIGHT-HAND |
| Mounting Provision | THREADED MOUNTING HOLES |
| Longest Horizontal Distance Between Mounting Centers | 1.875 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| FD5998 PRIMARY | Federal Mogul Corp Sub Wagner Brake Moog Automotive Div (USA) |
| Reference | Meaning |
|---|---|
| 95919HX | 5/2 Secondary reference U.S. Government activity |
| 8332304 | 5/9 Secondary reference U S Army Tank Automotive Command Amsta-Im-Mm |
| EW5998 | 5/9 Secondary reference U.S. Government activity |
| F5998 | 5/9 Secondary reference Federal Mogul Corp Sub Wagner Brake Moog Automotive Div |
| 95919HX | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
NSN 2530-00-391-3979 is a Cylinder Assembly,hydraulic Brak, manufactured by Federal Mogul Corp Sub Wagner Brake Moog Automotive Div, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-00-391-3979 has 1 manufacturer part number on file: FD5998 (Federal Mogul Corp Sub Wagner Brake Moog Automotive Div).
Key specifications for FD5998: Overall Height: 2.000 INCHES NOMINAL IN; First End Fork Depth: 0.281 INCHES NOMINAL ALL WORKING ENDS IN; Mounting Facility Thread Class: 2B; Bleeding Feature Quantity: 1. 28 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.