The Cup,hydraulic Brake Cylinder, cataloged under National Stock Number 1630-00-124-2905, is classified within Federal Supply Class 1630 (Aircraft Wheel and Brake Systems) of the Aircraft Components and Accessories group. The manufacturer of record is The Boeing Company Div Legacy Am&m. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1630-00-124-2905 |
| Primary Part Number | 6C12SR |
| Item Name | Cup,hydraulic Brake Cylinder |
| FSC / FSG | 1630 / 16 — Aircraft Wheel and Brake Systems |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Feathered Lip Feature | NOT INCLUDED |
| Largest Outside Diameter | 1.250 INCHES MAXIMUM IN |
| Projection Length | 0.187 INCHES NOMINAL IN |
| Outer Periphery Base Groove | NOT INCLUDED |
| Mounting Method | CENTER HOLE |
| Material Document and Classification | AMS 3200 ASSN STD SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.187 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Sealing Lip Length | 0.187 INCHES NOMINAL IN |
| Size Designator | 1-3/16 IN. IN |
| Base Outside Diameter | 1.125 INCHES NOMINAL IN |
| Base Inside Projection | INCLUDED |
| Base Thickness | 0.157 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Thru-Hole Length | 0.344 INCHES NOMINAL IN |
| Cup Protector | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 1630-00-124-2905 is a Cup,hydraulic Brake Cylinder, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 1630, Aircraft Wheel and Brake Systems. Status: active.
NSN 1630-00-124-2905 has 3 manufacturer part numbers on file: 6C12SR (The Boeing Company Div Legacy Am&m), B1117NB (The Boeing Company Div Legacy Am&m), B1117N (The Boeing Company Div Legacy Am&m).
Key specifications for 6C12SR: Feathered Lip Feature: NOT INCLUDED; Largest Outside Diameter: 1.250 INCHES MAXIMUM IN; Projection Length: 0.187 INCHES NOMINAL IN; Outer Periphery Base Groove: NOT INCLUDED. 15 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.
NSN 1630-00-124-2905 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.