The Diaphragm,chamber,brake, cataloged under National Stock Number 2530-00-312-0372, 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 Velvac Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2530-00-312-0372 |
| Primary Part Number | 25A9 |
| Item Name | Diaphragm,chamber,brake |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | Velvac Inc |
| Status | ACTIVE |
| Mounting Hole Quantity | 18 |
| Diaphragm Type | FLANGED ANGULAR RECESSED |
| Mounting Hole Spacing | EQUALLY SPACED ON A 8 IN. BOLT CIRCLE IN |
| Mounting Method | FLANGE |
| Mounting Hole Diameter | 0.328 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN |
| Overall Outside Diameter | 8.938 INCHES NOMINAL IN |
| Material Thickness | 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Construction | FABRIC INSERT |
| Material | RUBBER |
| 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 |
|---|---|
| 25A9 | Velvac Inc (USA) |
| Reference | Meaning |
|---|---|
| N-2318 | 3/9 Design control — primary reference Haldex Brake Products Corporation |
NSN 2530-00-312-0372 is a Diaphragm,chamber,brake, manufactured by Velvac Inc, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-00-312-0372 has 1 manufacturer part number on file: 25A9 (Velvac Inc).
Key specifications for 25A9: Mounting Hole Quantity: 18; Overall Height: 1.273 INCHES MINIMUM AND 1.293 INCHES MAXIMUM IN; Diaphragm Type: FLANGED ANGULAR RECESSED; Mounting Hole Spacing: EQUALLY SPACED ON A 8 IN. BOLT CIRCLE IN. 9 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.