The Stud,self-Locking, cataloged under National Stock Number 5307-00-505-9272, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5307-00-505-9272 |
| Primary Part Number | 240645 |
| Item Name | Stud,self-Locking |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Cotter Pin Hole Diameter | 0.065 INCHES MINIMUM AND 0.072 INCHES MAXIMUM FIRST HOLE IN |
| Thread Length | 0.220 INCHES MINIMUM AND 0.300 INCHES MAXIMUM NUT THREAD IN |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| Style Designator | SELF-LOCKING |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.312 INCHES NUT THREAD IN |
| Head Length | 0.476 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN |
| Locking Feature | SELF-CLINCHING HEAD |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 24 NUT THREAD |
| Material | STEEL COMP 615 |
| Distance Across Flats | 0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN |
| Thread Series Designator | UNF NUT THREAD |
| Distance From Cotter Pin Hole Centerline to Nut End | 0.252 INCHES MINIMUM AND 0.288 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.342 INCHES MINIMUM AND 0.348 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 |
|---|---|
| 240645 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 240645 | Thompson Aerospace, Llc Dba Thompson Aerospace Llc (USA) |
| Reference | Meaning |
|---|---|
| 240645 | 5/2 Secondary reference U.S. Government activity |
| 240645 | 5/9 Secondary reference Valco Co Government Sales Office |
NSN 5307-00-505-9272 is a Stud,self-Locking, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-505-9272 has 2 manufacturer part numbers on file: 240645 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 240645 (Thompson Aerospace, Llc Dba Thompson Aerospace Llc).
3 possible matches (shared part number, not a government interchangeability claim): 5940-01-089-5474, 6515-01-555-0640, 5640-01-677-7480. Verify interchangeability with system specifications before substitution.
Key specifications for 240645: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Cotter Pin Hole Diameter: 0.065 INCHES MINIMUM AND 0.072 INCHES MAXIMUM FIRST HOLE IN; Thread Length: 0.220 INCHES MINIMUM AND 0.300 INCHES MAXIMUM NUT THREAD IN; Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM. 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.