The Nut,plain,spline, cataloged under National Stock Number 5310-01-253-5924, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Penn Engineering & Manufacturing Corp. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-253-5924 |
| Primary Part Number | KF2-256-ET |
| Item Name | Nut,plain,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Penn Engineering & Manufacturing Corp |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Nominal Thread Size | 0.086 INCHES0.086 INCHES IN |
| Nut Diameter | 0.214 INCHES MINIMUM AND 0.214 INCHES MINIMUM AND 0.224 INCHES MAXIMUM0.224 INCHES MAXIMUM IN |
| Pilot Diameter | 0.157 INCHES MINIMUM AND 0.157 INCHES MINIMUM AND 0.163 INCHES MAXIMUM0.163 INCHES MAXIMUM IN |
| Pilot Length | 0.060 INCHES MAXIMUM0.060 INCHES MAXIMUM IN |
| Nut Height | 0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM0.130 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | SPLINESPLINE |
| Thread Class | 2B2B |
| Thread Quantity Per Inch | 5656 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| KF2-256-ET PRIMARY | Penn Engineering & Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| KF2-256 | 5/9 Secondary reference Penn Engineering & Manufacturing Corp |
NSN 5310-01-253-5924 is a Nut,plain,spline, manufactured by Penn Engineering & Manufacturing Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-253-5924 has 1 manufacturer part number on file: KF2-256-ET (Penn Engineering & Manufacturing Corp).
Key specifications for KF2-256-ET: Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HANDRIGHT-HAND; Nominal Thread Size: 0.086 INCHES0.086 INCHES IN. 13 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.