The Setscrew, cataloged under National Stock Number 5305-00-721-5899, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5305-00-721-5899 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | CANCELLED |
| Width Across Flats | 0.126 INCHES MINIMUM IN |
| Fastener Length | 1.000 INCHES MINIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.000 INCHES MINIMUM IN |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | OVAL |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 5305007215899 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| FFS103TYPE3STYLE3 | 4/1 Identification reference U.S. Government activity |
| 52110 FIND 14 | C/1 Advisory reference — outside the item-of-supply concept Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace |
| 502572 | E/8 Replaced / superseded reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| AN565F428H16 | 2/2 Government specification standardization U.S. Government activity |
| 502572 | E/8 Replaced / superseded reference U.S. Government activity |
| 502572 | E/8 Replaced / superseded reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 5305-00-721-5899 is a Setscrew, classified under FSC 5305, Screws. Status: cancelled.
2 possible matches (shared part number, not a government interchangeability claim): 5962-01-131-1241, 6515-01-615-2468. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-721-5899: Width Across Flats: 0.126 INCHES MINIMUM IN; Fastener Length: 1.000 INCHES MINIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 1.000 INCHES MINIMUM IN. 15 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 5305-00-721-5899 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.