The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-051-4078, 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 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5305-00-051-4078 |
| Primary Part Number | B1821BH031F125N |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | American National Standards Institute Incorporated Dba American National Standards Institute |
| Status | CANCELLED |
| Thread Series Designator | UNF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Material | STEEL OVERALL |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | ASTM A354, GRADE BD ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Quantity Per Inch | 24 |
| Width Between Flats | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Head Style | HEXAGON |
| Surface Treatment Document and Classification | ASTM B633, TYPE FE/ZN5 OR FE/ZN8 ASSN STD ALL TREATMENT RESPONSES OVERALL |
| Thread Class | 2A A |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Head Height | 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN |
| Fastener Length | 1.250 INCHES NOMINAL IN |
| Thread Length | 0.875 INCHES MINIMUM IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| AESQ1F312A25AW9A91 | The American Society of Mechanical Engineers (USA) |
| MS35304-36 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| 186505 | Rolls-Royce Solutions America Inc (USA) |
| 223587 | CAGE 00000 |
| B1821BH031F125N PRIMARY | American National Standards Institute Incorporated Dba American National Standards Institute (USA) |
| 63-CL-3335-1 PRIMARY | Rockford Powertrain Inc Div Powertrain Rockford, Inc. (USA) |
| C10-26066 PRIMARY | Brunswick Corp Dba Mercury Marine Div Mercury Marine (USA) |
| 157D4350-105 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| 5306000514078 | E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| MS90727-36 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
NSN 5305-00-051-4078 is a Screw,cap,hexagon Head, manufactured by American National Standards Institute Incorporated Dba American National Standards Institute, classified under FSC 5305 (No Item Name Available). Status: cancelled.
NSN 5305-00-051-4078 has 10 cross-referenced part numbers: AESQ1F312A25AW9A91 (The American Society of Mechanical Engineers), MS35304-36 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 186505 (Rolls-Royce Solutions America Inc), 223587, B1821BH031F125N (American National Standards Institute Incorporated Dba American National Standards Institute) and 5 more.
There are 3 known substitutes for 5305-00-051-4078: 2805-00-356-1579, 5306-00-543-5727, 5365-01-190-2130. Verify interchangeability with system specifications before substitution.
Key specifications for B1821BH031F125N: Thread Series Designator: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Diameter: 0.312 INCHES IN; Material: STEEL OVERALL. 15 total characteristics are documented in the Federal Logistics Information System.
NSN 5305-00-051-4078 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.