The Screw,lag, cataloged under National Stock Number 5305-00-177-5578, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is American National Standards Institute Incorporated Dba American National Standards Institute. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 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 | 5305-00-177-5578 |
| Primary Part Number | ANSI B18.2.1 |
| Item Name | Screw,lag |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | American National Standards Institute Incorporated Dba American National Standards Institute |
| Status | CANCELLED |
| Surface Treatment Document and Classification | ASTM A153-60 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Fastener Length | 4.000 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Shoulder Length | 0.125 INCHES MINIMUM OVERALL IN |
| Nonmachine Thread Style | GIMLET POINT (TYPE A, AB OR BA) |
| Hardness Rating | 60.0 ROCKWELL B MINIMUM OVERALL |
| Surface Treatment | ZINC OVERALL |
| Nonmachine Nominal Thread Diameter | 0.312 INCHES IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shoulder Diameter | 0.298 INCHES MINIMUM AND 0.324 INCHES MAXIMUM FIRST SHOULDER IN |
| Head Height | 0.195 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN |
| Width Between Flats | 0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| ANSI B18.2.1 | American National Standards Institute Incorporated Dba American National Standards Institute (USA) |
| 1065 | Bolt Depot, Inc. (USA) |
| MS16992-528 | 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 5305-00-177-5578 is a Screw,lag, manufactured by American National Standards Institute Incorporated Dba American National Standards Institute, classified under FSC 5305 (No Item Name Available). Status: cancelled.
NSN 5305-00-177-5578 has 5 cross-referenced part numbers: ANSI B18.2.1 (American National Standards Institute Incorporated Dba American National Standards Institute), 1065 (Bolt Depot, Inc.), MS16992-528 (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 5305-00-177-5578: 5305-00-058-2971, 5305-00-145-1064, 5305-00-177-5505 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for ANSI B18.2.1: Surface Treatment Document and Classification: ASTM A153-60 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Fastener Length: 4.000 INCHES NOMINAL IN; Head Style: HEXAGON; Shoulder Length: 0.125 INCHES MINIMUM OVERALL IN. 14 total characteristics are documented in the Federal Logistics Information System.
NSN 5305-00-177-5578 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.