The Screw,lag, cataloged under National Stock Number 5305-00-177-5542, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5305-00-177-5542 |
| Primary Part Number | FF-B-561 |
| Item Name | Screw,lag |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Federal Specifications Promulgated by General Services Administration Washington DC |
| Status | CANCELLED |
| Fastener Length | 3.000 INCHES NOMINAL IN |
| Hardness Rating | 60.0 ROCKWELL B MINIMUM OVERALL |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Head Height | 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM-B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Nonmachine Nominal Thread Diameter | 0.250 INCHES IN |
| Surface Treatment | ZINC OVERALL |
| Nonmachine Thread Style | GIMLET POINT (TYPE A, AB OR BA) |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Shoulder Length | 0.094 INCHES MINIMUM FIRST SHOULDER IN |
| Width Between Flats | 0.437 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Head Style | HEXAGON |
| Shoulder Diameter | 0.237 INCHES MINIMUM AND 0.260 INCHES MAXIMUM FIRST SHOULDER IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| FF-B-561 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| FF-B-561 TY1ST1GRB | General Services Administration Federal Supply Service (USA) |
| 1050 | Bolt Depot, Inc. (USA) |
| ASME-B18.2.1 | The American Society of Mechanical Engineers (USA) |
| MS16992-507 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| ANSI B18.2.1 | American National Standards Institute Incorporated Dba American National Standards Institute (USA) |
NSN 5305-00-177-5542 is a Screw,lag, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5305 (No Item Name Available). Status: cancelled.
NSN 5305-00-177-5542 has 6 cross-referenced part numbers: FF-B-561 (Federal Specifications Promulgated by General Services Administration Washington DC), FF-B-561 TY1ST1GRB (General Services Administration Federal Supply Service), 1050 (Bolt Depot, Inc.), ASME-B18.2.1 (The American Society of Mechanical Engineers), MS16992-507 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M) and 1 more.
There are 12 known substitutes for 5305-00-177-5542: 5305-00-145-1064, 5305-00-177-5505, 5305-00-177-5578 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for FF-B-561: Fastener Length: 3.000 INCHES NOMINAL IN; Hardness Rating: 60.0 ROCKWELL B MINIMUM OVERALL; Shoulder Shape: ROUND FIRST SHOULDER; Head Height: 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN. 14 total characteristics are documented in the Federal Logistics Information System.
NSN 5305-00-177-5542 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.