The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-01-512-0276, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is A W Chesterton Co Div Sealing Device Division. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-512-0276 |
| Primary Part Number | 639908-180-1.37-CB/SC-EP-OK |
| Item Name | Seal Assembly,shaft,spring Loade |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | A W Chesterton Co Div Sealing Device Division |
| Status | ACTIVE |
| Overall Diameter | 5.400 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 639908-180-1.37-CB/SC-EP-OK PRIMARY | A W Chesterton Co Div Sealing Device Division (USA) |
NSN 4320-01-512-0276 is a Seal Assembly,shaft,spring Loade, manufactured by A W Chesterton Co Div Sealing Device Division, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-512-0276 has 1 manufacturer part number on file: 639908-180-1.37-CB/SC-EP-OK (A W Chesterton Co Div Sealing Device Division).
Key specifications for 639908-180-1.37-CB/SC-EP-OK: Overall Diameter: 5.400 INCHES MAXIMUM IN; Special Features: SEAL ASSEMBLY, SHAFT; DESIGNED TO FIT ANSI, DIN,API PUMPS; SPEED LIMITS: 5000 FPM 25M/SEC MAX; TEMP LIMITS: TO 300 DEGREES FAHRENHEIT ETHYLENE PROPYLENE, TO 400 DEGREES FAHRENHEIT FLOUROCARBON/AFLAS; PRESSURE LIMITS: SM SIZE 1.750 INCH THROUGH 2.500 INCH 600 PSIG, LG SIZE 2.625 INCH THROUGH 4.750 INCH 600 PSIG; SEAL FACES: CARBON WITH SILICON CARBIDE; ELASTOMER: ETHYLENE PROPYLENE; OVERSIZED GLAND; STYLE: 180; DIMENSION: 1.37; SPARES KIT IN; Part Name Assigned by Controlling Agency: INAVY: MECH SEAL SINGLE. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.