The Window Assembly,shi, cataloged under National Stock Number 4920-01-170-8105, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Technical Wire Products, Llc Dba Twp. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4920-01-170-8105 |
| Primary Part Number | 71-90556A |
| Item Name | Window Assembly,shi |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Technical Wire Products, Llc Dba Twp |
| Status | ACTIVE |
| FSC Application Data | TEST SET,INDICATOR |
| General Characteristics Item Description | 4.250 IN. LG; 2.500 IN. W; ACRYLIC; COLOR CLEAR; OPR. TEMP. MINUS 55.0 TO PLUS 85.0 C 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 |
|---|---|
| 71-90556A PRIMARY | Technical Wire Products, Llc Dba Twp (USA) |
| Reference | Meaning |
|---|---|
| 3304961-1 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 4920-01-170-8105 is a Window Assembly,shi, manufactured by Technical Wire Products, Llc Dba Twp, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-170-8105 has 1 manufacturer part number on file: 71-90556A (Technical Wire Products, Llc Dba Twp).
Key specifications for 71-90556A: FSC Application Data: TEST SET,INDICATOR; General Characteristics Item Description: 4.250 IN. LG; 2.500 IN. W; ACRYLIC; COLOR CLEAR; OPR. TEMP. MINUS 55.0 TO PLUS 85.0 C IN; End Item Identification: AVIONICS SUPPORT. 2 specifications are 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 4920-01-170-8105 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.