The Screw,assembled Washer, cataloged under National Stock Number 5305-00-237-7660, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Telemechanics Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-237-7660 |
| Primary Part Number | 185871 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Head Height | 0.125 INCHES NOMINAL IN |
| Fastener Length | 0.331 INCHES NOMINAL IN |
| Primary Washer Outside Diameter | 0.331 INCHES NOMINAL IN |
| Thread Length | 0.331 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | HEXAGON |
| Primary Washer Style | SPRING TENSION |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.050 INCHES NOMINAL IN |
| Width Between Flats | 0.250 INCHES NOMINAL IN |
| Surface Treatment | OXIDE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Washer Quantity | 1 |
| 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 |
|---|---|
| 185871 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 185871 | 5/9 Secondary reference American Telephone and Telegraph Co |
NSN 5305-00-237-7660 is a Screw,assembled Washer, manufactured by Telemechanics Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-237-7660 has 1 manufacturer part number on file: 185871 (Telemechanics Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4140-00-483-1932, 2530-01-166-1368. Verify interchangeability with system specifications before substitution.
Key specifications for 185871: Head Height: 0.125 INCHES NOMINAL IN; Fastener Length: 0.331 INCHES NOMINAL IN; Primary Washer Outside Diameter: 0.331 INCHES NOMINAL IN; Thread Length: 0.331 INCHES NOMINAL IN. 17 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.
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.