The Seat,buffer,spring Orifice, cataloged under National Stock Number 5340-01-261-1955, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Woodward, Inc. Div Fuel Systems and Controls. 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 | 5340-01-261-1955 |
| Primary Part Number | 3583-028 |
| Item Name | Seat,buffer,spring Orifice |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Woodward, Inc. Div Fuel Systems and Controls |
| Status | ACTIVE |
| General Characteristics Item Description | SST 410 AMS 5613; 0.550 IN. LG; PASSIVATE; HARDEN RC 25-31; 0.620-0.625 IN. HEAD DIA; 0.0785-0.0885 IN. HEAD HEIGHT; 10-32 UNF-3A THDS FULL LG; 0.184-0.190 IN. DIA SHANK; 0.0937-0.0960 IN. HOLE DIA 0.172 IN. DEEP A |
| 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 |
|---|---|
| 3583-028 PRIMARY | Woodward, Inc. Div Fuel Systems and Controls (USA) |
NSN 5340-01-261-1955 is a Seat,buffer,spring Orifice, manufactured by Woodward, Inc. Div Fuel Systems and Controls, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-261-1955 has 1 manufacturer part number on file: 3583-028 (Woodward, Inc. Div Fuel Systems and Controls).
Key specifications for 3583-028: General Characteristics Item Description: SST 410 AMS 5613; 0.550 IN. LG; PASSIVATE; HARDEN RC 25-31; 0.620-0.625 IN. HEAD DIA; 0.0785-0.0885 IN. HEAD HEIGHT; 10-32 UNF-3A THDS FULL LG; 0.184-0.190 IN. DIA SHANK; 0.0937-0.0960 IN. HOLE DIA 0.172 IN. DEEP A. 1 specification is 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.