The Screw,close Tolerance, cataloged under National Stock Number 5305-01-007-8757, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Dba Lockheed Martin Div Rotary and Mission Systems (rms). Government technical data includes 19 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-007-8757 |
| Primary Part Number | LS15237-3-10 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lockheed Martin Corporation Dba Lockheed Martin Div Rotary and Mission Systems (rms) |
| Status | ACTIVE |
| Fastener Length | 0.953 INCHES MINIMUM AND 0.983 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.318 INCHES MINIMUM AND 0.368 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049RJGCAMS 6322 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP E4340 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.266 INCHES MINIMUM AND 0.303 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 |
|---|---|
| LS15237-3-10 | Lockheed Martin Corporation Dba Lockheed Martin Div Rotary and Mission Systems (rms) (USA) |
| LS15237-3-10 | Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc (USA) |
| Reference | Meaning |
|---|---|
| LS15237-3-10 | 3/9 Design control — primary reference Lockheed Martin Services, Llc |
| LS15237-3-10 | 5/9 Secondary reference U.S. Government activity |
| LS15237-3-10 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| LS15237-3-10 | 5/9 Secondary reference Hi-Shear Corporation |
| AR49 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| LS15237-3-10 | 5/2 Secondary reference U.S. Government activity |
| LS15237-3-10 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| LS15237-3-10 | 5/9 Secondary reference Huck International, Inc |
NSN 5305-01-007-8757 is a Screw,close Tolerance, manufactured by Lockheed Martin Corporation Dba Lockheed Martin Div Rotary and Mission Systems (rms), classified under FSC 5305, Screws. Status: active.
NSN 5305-01-007-8757 has 2 manufacturer part numbers on file: LS15237-3-10 (Lockheed Martin Corporation Dba Lockheed Martin Div Rotary and Mission Systems (rms)), LS15237-3-10 (Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc).
1 possible match (shared part number, not a government interchangeability claim): 6650-01-120-6230. Verify interchangeability with system specifications before substitution.
Key specifications for LS15237-3-10: Fastener Length: 0.953 INCHES MINIMUM AND 0.983 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.318 INCHES MINIMUM AND 0.368 INCHES MAXIMUM IN; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL. 19 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.