The Cup,hydraulic Brake Cylinder, cataloged under National Stock Number 2530-00-979-4338, 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 Meritor Industrial Products, Llc. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2530-00-979-4338 |
| Primary Part Number | 1706J88 |
| Item Name | Cup,hydraulic Brake Cylinder |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | Meritor Industrial Products, Llc |
| Status | ACTIVE |
| Feathered Lip Feature | INCLUDED |
| Largest Outside Diameter | 1.950 INCHES NOMINAL IN |
| Outer Periphery Base Groove | NOT INCLUDED |
| Mounting Method | FLAT BASE |
| Sealing Lip Length | 0.267 INCHES NOMINAL IN |
| Size Designator | 1.875 |
| Base Outside Diameter | 1.838 INCHES NOMINAL IN |
| Base Inside Projection | NOT INCLUDED |
| Base Thickness | 0.130 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC |
| Angle in Deg | 60.0 |
| Cup Protector | NOT INCLUDED |
| 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 |
|---|---|
| 1706J88 | Meritor Industrial Products, Llc (USA) |
| 1706J88 | Meritor Heavy Vehicle Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| VG5548 | 3/9 Design control — primary reference American Standard Inc Westinghouse Air Brake Co Div |
| 1706J88 | 5/9 Secondary reference Rockwell Intl Corp Highway Brake and Trailer Axle Div Heavy Vehicles Components Opns |
NSN 2530-00-979-4338 is a Cup,hydraulic Brake Cylinder, manufactured by Meritor Industrial Products, Llc, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-00-979-4338 has 2 manufacturer part numbers on file: 1706J88 (Meritor Industrial Products, Llc), 1706J88 (Meritor Heavy Vehicle Systems, Llc).
Key specifications for 1706J88: Feathered Lip Feature: INCLUDED; Largest Outside Diameter: 1.950 INCHES NOMINAL IN; Outer Periphery Base Groove: NOT INCLUDED; Mounting Method: FLAT BASE. 12 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.