The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-638-1278, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Kearfott Corporation Div Guidance and Navigation Division. Government technical data includes 20 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5305-00-638-1278 |
| Primary Part Number | H66716-0403 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Kearfott Corporation Div Guidance and Navigation Division |
| Status | CANCELLED |
| Hardness Rating | 80.0 ROCKWELL B MINIMUM OVERALL |
| Thread Class | 3A A |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Minimum Yield Strength | 30000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Head Diameter | 0.176 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Nondefinitive Spec/std Data | 1 TYPE |
| Head Height | 0.108 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN |
| Head Style | FLAT CHAMFER |
| Minimum Tensile Strength | 80000 POUNDS PER SQUARE INCH LBS |
| Width Across Flats | 0.078 INCHES NOMINAL IN |
| Thread Length | 0.169 INCHES MINIMUM IN |
| Thread Direction | RIGHT-HAND |
| Fastener Length | 0.188 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 40 |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| H66716-0403 PRIMARY | Kearfott Corporation Div Guidance and Navigation Division (USA) |
| FFS86TYPE1 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| 1054640 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| NAS608C440-3 | National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA) |
NSN 5305-00-638-1278 is a Screw,cap,socket Head, manufactured by Kearfott Corporation Div Guidance and Navigation Division, classified under FSC 5305 (No Item Name Available). Status: cancelled.
NSN 5305-00-638-1278 has 4 cross-referenced part numbers: H66716-0403 (Kearfott Corporation Div Guidance and Navigation Division), FFS86TYPE1 (Federal Specifications Promulgated by General Services Administration Washington DC), 1054640 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), NAS608C440-3 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use).
There is 1 known substitute for 5305-00-638-1278: 5995-00-733-8658. Verify interchangeability with system specifications before substitution.
Key specifications for H66716-0403: Hardness Rating: 80.0 ROCKWELL B MINIMUM OVERALL; Thread Class: 3A A; Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL; Minimum Yield Strength: 30000 POUNDS PER SQUARE INCH LBS. 20 total characteristics are documented in the Federal Logistics Information System.
NSN 5305-00-638-1278 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.