The Screw,lag, cataloged under National Stock Number 5305-00-402-5747, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is General Services Administration Federal Supply Service. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 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 | 5305-00-402-5747 |
| Primary Part Number | FF-B-561 TY1ST1GRB |
| Item Name | Screw,lag |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | General Services Administration Federal Supply Service |
| Status | CANCELLED |
| Nonmachine Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Width Between Flats | 0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Nonmachine Thread Style | GIMLET POINT (TYPE A, AB OR BA) |
| Shoulder Diameter | 0.237 INCHES MINIMUM AND 0.260 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | ASTM A153-60 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Surface Treatment | ZINC OVERALL |
| Shoulder Length | 0.094 INCHES MINIMUM FIRST SHOULDER IN |
| Hardness Rating | 60.0 ROCKWELL B MINIMUM OVERALL |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material | STEEL OVERALL |
| Head Height | 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Fastener Length | 1.500 INCHES NOMINAL IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| FF-B-561 TY1ST1GRB | General Services Administration Federal Supply Service (USA) |
| FF-B-561 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| MS16992-503 | 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 5305-00-402-5747 is a Screw,lag, manufactured by General Services Administration Federal Supply Service, classified under FSC 5305 (No Item Name Available). Status: cancelled.
NSN 5305-00-402-5747 has 4 cross-referenced part numbers: FF-B-561 TY1ST1GRB (General Services Administration Federal Supply Service), FF-B-561 (Federal Specifications Promulgated by General Services Administration Washington DC), MS16992-503 (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).
There are 12 known substitutes for 5305-00-402-5747: 5305-00-145-1064, 5305-00-177-5505, 5305-00-177-5542 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for FF-B-561 TY1ST1GRB: Nonmachine Nominal Thread Diameter: 0.250 INCHES IN; Head Style: HEXAGON; Width Between Flats: 0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN; Nonmachine Thread Style: GIMLET POINT (TYPE A, AB OR BA). 14 total characteristics are documented in the Federal Logistics Information System.
NSN 5305-00-402-5747 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.