The Washer,key, cataloged under National Stock Number 5310-00-727-8900, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring. Government technical data includes 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-727-8900 |
| Primary Part Number | 500984 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Inside of Prebent Key | 0.220 INCHES NOMINAL IN |
| Split Key Length | 0.128 INCHES NOMINAL IN |
| Precious Material | SILVER |
| External Prebent Key Length | 0.136 INCHES NOMINAL IN |
| Overall Distance Including Keys | 0.610 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 0.451 INCHES NOMINAL IN |
| External Tapered Key Width | 0.258 INCHES NOMINAL IN |
| Material Thickness | 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN |
| External Key Quantity | 1 |
| Surface Treatment | SILVER OVERALL |
| External Prebent Key Width | 0.117 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Angle Between External Keys | 36.0 DEGREES NOMINAL |
| Hole Diameter | 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM 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 |
|---|---|
| 500984 PRIMARY | Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring (USA) |
| Reference | Meaning |
|---|---|
| 500984 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 500984 | 5/9 Secondary reference Royal Oak Gage, Inc |
| 500984 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 5310-00-727-8900 is a Washer,key, manufactured by Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-727-8900 has 1 manufacturer part number on file: 500984 (Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-222-9852. Verify interchangeability with system specifications before substitution.
Key specifications for 500984: Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Inside of Prebent Key: 0.220 INCHES NOMINAL IN; Split Key Length: 0.128 INCHES NOMINAL IN; Precious Material: SILVER. 16 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.