The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-01-156-7954, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is John Crane, Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-156-7954 |
| Primary Part Number | M38977 |
| Item Name | Seal Assembly,shaft,spring Loade |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | John Crane, Inc |
| Status | ACTIVE |
| General Characteristics Item Description | 3/4 IN. INSIDE DIAMETER,ITEM CONSISTS OF 1 EACH O RING-VITON,1 EACH RETAINER-PLATE STEEL,1 EACH SEAT-NI-RESIST,1 EACH SPRING-STAINLESS STEEL,1EACH WASHER-50 GRADE CARBON 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 |
|---|---|
| 2-473-028-999 | Viking Pump, Inc (USA) |
| M38977 PRIMARY | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| NSP-00146 XF911O151(316) | 3/9 Design control — primary reference Wartsila Lips Inc |
| 8348870 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
| 3/4IN.TY2-D-SK1098-XF-SUB-50871 | 5/9 Secondary reference John Crane, Inc |
| NSP-00146 XF911O151(316) | 5/9 Secondary reference John Crane, Inc |
| 3/4IN.TY2-D-SK1098XF911O151 | 5/9 Secondary reference John Crane, Inc |
NSN 4320-01-156-7954 is a Seal Assembly,shaft,spring Loade, manufactured by John Crane, Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-156-7954 has 2 manufacturer part numbers on file: 2-473-028-999 (Viking Pump, Inc), M38977 (John Crane, Inc).
Key specifications for M38977: General Characteristics Item Description: 3/4 IN. INSIDE DIAMETER,ITEM CONSISTS OF 1 EACH O RING-VITON,1 EACH RETAINER-PLATE STEEL,1 EACH SEAT-NI-RESIST,1 EACH SPRING-STAINLESS STEEL,1EACH WASHER-50 GRADE CARBON IN. 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.