The Screw,shoulder, cataloged under National Stock Number 5305-00-250-2144, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Heartland Precision Fasteners Inc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-250-2144 |
| Primary Part Number | HP6551C3-647 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Head Diameter | 0.276 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Thread Quantity Per Inch | 32 |
| Shoulder Diameter | 0.193 INCHES MINIMUM AND 0.195 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Series Designator | UNF |
| Surface Treatment | PAINT TOP OF HEAD |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Head Style | FLAT COUNTERSUNK |
| Thread Length | 0.291 INCHES MINIMUM AND 0.351 INCHES MAXIMUM IN |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Material | STEEL COMP 4037 OR STEEL COMP 8740 OVERALL |
| Thread Direction | RIGHT-HAND |
| Fastener Length | 0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Internal Drive Style | SLOT |
| Shoulder Length | 0.530 INCHES MINIMUM AND 0.560 INCHES MAXIMUM FIRST SHOULDER IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| GS551C3-647 | Pilgrim Screw Corporation Dba Pilgrim Aerospace Fasteners (USA) |
| HP6551C3-647 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| S100C3-647 | Fastener Engineering Corp (USA) |
| B1990-7-4 | Bfgoodrich Co the Aerospace Div Engineered Polymer Products (USA) |
| PBF1285-3-647 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC551C3-647 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BM19069-3-647 PRIMARY | Huck International, Inc (USA) |
| GS551C3-647 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS551C3-647 | Heartland Precision Fasteners Inc (USA) |
| PIL551C3-647 PRIMARY | Pilgrim Screw Corporation Dba Pilgrim Aerospace Fasteners (USA) |
| GS551C3-647 | Northrop Grumman Systems Corporation (USA) |
| GS551C3-647 | Huck International, Inc (USA) |
NSN 5305-00-250-2144 is a Screw,shoulder, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-250-2144 has 12 cross-referenced part numbers: GS551C3-647 (Pilgrim Screw Corporation Dba Pilgrim Aerospace Fasteners), HP6551C3-647 (Heartland Precision Fasteners Inc), S100C3-647 (Fastener Engineering Corp), B1990-7-4 (Bfgoodrich Co the Aerospace Div Engineered Polymer Products), PBF1285-3-647 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 7 more.
There is 1 known substitute for 5305-00-250-2144: 5930-00-106-7214. Verify interchangeability with system specifications before substitution.
Key specifications for HP6551C3-647: Surface Treatment: CADMIUM AND CHROMATE OVERALL; Head Diameter: 0.276 INCHES NOMINAL IN; Shoulder Shape: ROUND FIRST SHOULDER; Thread Quantity Per Inch: 32. 19 total characteristics are documented in the Federal Logistics Information System.