The Nut Option, cataloged under National Stock Number 5310-01-268-5506, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Esna, Llc. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Nut Option |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Esna, Llc (CAGE 019L2); Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (CAGE 77445); Sps Technologies, Llc Dba PB Fasteners (CAGE 56878); Howmet Global Fastening Systems Inc (CAGE 15653) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-268-5506 |
| Primary Part Number | ST2395-09 |
| Item Name | Nut Option |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| ST2395-09 PRIMARY | Esna, Llc (USA) |
| 4073365 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| ST2396-09 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST2395-09 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST2483-09 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| ST2483-09 | 5/9 Secondary reference Harvard Industries Inc |
| ST2397-09 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-268-5506 is a Nut Option, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-268-5506 has 5 manufacturer part numbers on file: ST2395-09 (Esna, Llc), 4073365 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), ST2396-09 (Sps Technologies, Llc Dba PB Fasteners), ST2395-09 (Howmet Global Fastening Systems Inc), ST2483-09 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-284-9235. Verify interchangeability with system specifications before substitution.
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.