The Piston Retainer,ejector Assembly, cataloged under National Stock Number 1377-01-083-4277, is classified within Federal Supply Class 1377 (Cartridge and Propellant Actuated Devices and Components) of the Ammunition and Explosives group. The manufacturer of record is Wk Engineering International, Inc. Dba Wk Engineering International Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1377-01-083-4277 |
| Primary Part Number | 36172-1 |
| Item Name | Piston Retainer,ejector Assembly |
| FSC / FSG | 1377 / 13 — Cartridge and Propellant Actuated Devices and Components |
| Manufacturer | Wk Engineering International, Inc. Dba Wk Engineering International Inc |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,MIL-S-6758,COMP 4130; NICKEL PLATED,MIL-C-26074,CLASS 2; 1.313 IN. NOM DIA;0.813 IN. NOM H; THD DATA,1.000-12 UNF-3B,HEXAGONAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 36172-1 PRIMARY | Wk Engineering International, Inc. Dba Wk Engineering International Inc (USA) |
| Reference | Meaning |
|---|---|
| 36172-1 | 5/9 Secondary reference Ducommun Aerostructures, Inc. Div Gardena |
NSN 1377-01-083-4277 is a Piston Retainer,ejector Assembly, manufactured by Wk Engineering International, Inc. Dba Wk Engineering International Inc, classified under FSC 1377, Cartridge and Propellant Actuated Devices and Components. Status: active.
NSN 1377-01-083-4277 has 1 manufacturer part number on file: 36172-1 (Wk Engineering International, Inc. Dba Wk Engineering International Inc).
Key specifications for 36172-1: General Characteristics Item Description: STEEL,MIL-S-6758,COMP 4130; NICKEL PLATED,MIL-C-26074,CLASS 2; 1.313 IN. NOM DIA;0.813 IN. NOM H; THD DATA,1.000-12 UNF-3B,HEXAGONAL 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.
NSN 1377-01-083-4277 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.