The Screw,lag, cataloged under National Stock Number 5305-00-402-5749, 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 5 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 | 5305-00-402-5749 |
| Primary Part Number | ANSI B18.2.1 |
| Item Name | Screw,lag |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | General Services Administration Federal Supply Service |
| Status | CANCELLED |
| Fastener Length | 3.500 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Shoulder Length | 0.094 INCHES MINIMUM FIRST SHOULDER IN |
| Width Between Flats | 0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Hardness Rating | 60.0 ROCKWELL B MINIMUM OVERALL |
| Material | STEEL OVERALL |
| Surface Treatment Document and Classification | ASTM A153-60 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.237 INCHES MINIMUM AND 0.260 INCHES MAXIMUM FIRST SHOULDER IN |
| Nonmachine Nominal Thread Diameter | 0.250 INCHES IN |
| Surface Treatment | ZINC OVERALL |
| Nonmachine Thread Style | GIMLET POINT (TYPE A, AB OR BA) |
| Head Height | 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| ANSI B18.2.1 | General Services Administration Federal Supply Service (USA) |
| 1051 | Bolt Depot, Inc. (USA) |
| MS16992-508 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| FF-B-561 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| FF-B-561 TY1ST1GRB | General Services Administration Federal Supply Service (USA) |
NSN 5305-00-402-5749 is a Screw,lag, manufactured by General Services Administration Federal Supply Service, classified under FSC 5305 (No Item Name Available). Status: cancelled.
NSN 5305-00-402-5749 has 5 cross-referenced part numbers: ANSI B18.2.1 (General Services Administration Federal Supply Service), 1051 (Bolt Depot, Inc.), MS16992-508 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), FF-B-561 (Federal Specifications Promulgated by General Services Administration Washington DC), FF-B-561 TY1ST1GRB (General Services Administration Federal Supply Service).
There are 12 known substitutes for 5305-00-402-5749: 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 ANSI B18.2.1: Fastener Length: 3.500 INCHES NOMINAL IN; Head Style: HEXAGON; Shoulder Length: 0.094 INCHES MINIMUM FIRST SHOULDER IN; Width Between Flats: 0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN. 14 total characteristics are documented in the Federal Logistics Information System.
NSN 5305-00-402-5749 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.